High-performance large-section aluminum alloy valve body and preparation method thereof

Abstract

The invention relates to the field of aluminum alloy material processing, in particular to a high-performance large-section aluminum alloy valve body and a preparation method of the high-performance large-section aluminum alloy valve body. The content of Fe is smaller than or equal to 0.15%; the Cu content is less than or equal to 0.1%; the content of Mn is 0.55 to 0.6 percent; the content of Mg is 0.95 to 1 percent; the content of Cr is 0.1 to 0.15 percent; the content of Zn is 0-0.1%; the content of Ti is 0.05 to 0.15 percent; the content of Zr is 0.1 to 0.15 percent; the single content of other impurity elements is less than or equal to 0.05%; the total content of other impurity elements is less than or equal to 0.15%; the balance is Al; wherein the content of Mg2Si is 1.5-1.6%, the content of excess Si is 0.35-0.45%, and the performances of all positions in the transverse direction and the longitudinal direction of the valve body all reach that the yield strength is 300 Mpa, the tensile strength is 320 Mpa, the percentage elongation after fracture is 8%, the hardness is larger than or equal to 100 HBW, the coarse grain is smaller than or equal to 0.5 mm, and the conductivity is 24-28 MS / m.

Description

Technical Field

[0001] The present invention relates to the technical field of aluminum alloy processing, and in particular to a high-performance large-section aluminum alloy valve body and a preparation method thereof. Background Art

[0002] 6082 alloy is a 6 series high-strength aluminum alloy. When extruding a large-section valve body, the difficulties encountered are as follows: First, the cross-section size of the required raw material ingot is large, with a diameter of 582mm. During the smelting stage, the cast structure is prone to uneven grain size and segregation, resulting in large differences in the performance of various parts of the valve body section after extrusion; Second, during the extrusion production stage, the larger the size of the valve body section, on the one hand, due to the constraints of the mold and the extrusion barrel, the metal flow rate at the edge is slower than that in the core. This difference in flow rate causes the deformation degree of the metal at the edge to be less than that in the core, affecting the mechanical properties of the edge. At the same time, the metal close to the mold surface is subject to greater friction, making it more difficult to flow, further exacerbating the metal flow between the edge and the core. The unevenness of the movement makes the density of the edge organization inferior to that of the core, which reduces the performance of the edge; on the other hand, a large amount of deformation heat will be generated inside the aluminum alloy bar. The heat in the core is not easy to dissipate, and the temperature is relatively high. The higher temperature is conducive to the recrystallization process of the metal, making the core grains more uniform and fine, thereby improving the performance of the core; the edge metal is in contact with the mold and the external environment, the heat dissipation is faster, the temperature is relatively low, the recrystallization process is incomplete, the grain size is large and uneven, resulting in the performance of the edge being lower than that of the core; the above reasons make it extremely difficult to achieve greater consistency in the transverse and longitudinal performances across the entire valve body cross-section when producing large-size valve bodies, and the transverse performance can achieve the same high requirements as the longitudinal performance across the entire cross-section.

[0003] Therefore, there is an urgent need to provide an aluminum alloy valve body with consistent transverse and longitudinal properties throughout the entire cross-section and excellent mechanical properties, and a preparation method thereof. Summary of the Invention

[0004] The present invention aims to solve the technical problem of how to provide an aluminum alloy valve body having consistent transverse and longitudinal performances throughout the entire cross section and excellent mechanical properties, and a method for preparing the valve body.

[0005] In order to achieve the above-mentioned object, the first aspect of the present invention provides a high-performance large-section aluminum alloy valve body, wherein the components and their weight percentages in the valve body are as follows:

[0006] Si content is 0.95-1%;

[0007] Fe content ≤ 0.15%;

[0008] Cu content ≤ 0.1%;

[0009] Mn content is 0.55-0.6%;

[0010] Mg content is 0.95-1%;

[0011] Cr content is 0.1-0.15%;

[0012] Zn content is 0-0.1%;

[0013] Ti content is 0.05-0.15%;

[0014] Zr content is 0.1-0.15%;

[0015] The content of other impurity elements is ≤0.05%;

[0016] The total content of other impurity elements is ≤0.15%;

[0017] The remainder is Al;

[0018] Among them, the Mg2Si content is 1.5-1.6%, and the excess Si content is 0.35-0.45%.

[0019] A second aspect of the present invention provides a method for preparing the above-mentioned high-performance large-section aluminum alloy valve body, characterized in that the method comprises:

[0020] Casting, homogenization, extrusion, aging treatment;

[0021] The casting conditions include: adding electromagnetic stirring, stirring speed of 350-450r / min, hydrogen content of no more than 0.1cm during casting 3 / 100g, the amount of waste added does not exceed 25%, only the surface of the scrap aluminum substrate is added, continuous casting is used, the cooling rate is 15-20℃ / s, and the solidification time is 3-5min;

[0022] The homogenization treatment conditions include: homogenization treatment at 555-560° C. for 11.5-12.5 hours, and cooling to room temperature at a water cooling rate of 55-65° C. / s.

[0023] The beneficial effects of the present invention are:

[0024] The valve body provided by the present invention has performance at all positions in both horizontal and vertical directions reaching a yield strength of 300 MPa, a tensile strength of 320 MPa, an elongation after fracture of 8%, a hardness of ≥100 HBW, a coarse grain of ≤0.5 mm, and an electrical conductivity of 24-28 MS / m.

[0025] The preparation method provided by the present invention can achieve maximum uniformity of performance at different cross-sectional positions and in different directions when producing a valve body with a diameter of up to 220 mm, so that when manufacturing large-sized valve bodies, aluminum alloy extrusion can be selected to produce qualified blanks. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is the cross-section of the valve body;

[0027] Figure 2 Diagram of selected points for testing transverse mechanical properties of valve body;

[0028] Figure 3 Diagram of selected points for testing the longitudinal mechanical properties of the valve body. DETAILED DESCRIPTION

[0029] The endpoints of the ranges and any values disclosed herein are not limited to the precise ranges or values, and these ranges or values should be understood to include values close to these ranges or values. For numerical ranges, the endpoints of each range, the endpoints of each range and individual point values, and the individual point values can be combined with each other to obtain one or more new numerical ranges, which should be considered to be specifically disclosed herein.

[0030] In the present invention, the large cross-section is a valve body with a cross-section specification of 230 mm×110 mm.

[0031] In the existing technology, it is difficult to prepare an aluminum alloy valve body without a coarse grain layer and with excellent performance due to the existing alloy composition and preparation process, which makes it difficult for the mechanical properties of the aluminum alloy valve body to meet the requirements.

[0032] In the present invention, the inventors found that if the alloy composition is controlled and the processing technology is adjusted, the performance of the aluminum alloy valve body can be made to meet the requirements, without a coarse grain layer, and with excellent mechanical properties.

[0033] To achieve this goal, the inventors attempted to optimize the composition and processing technology of the aluminum alloy valve body. The inventors found that the above purpose can be achieved through specific component composition and melting, casting and homogenization processes. Furthermore, specific extrusion and heat treatment processes make the performance of the aluminum alloy valve body even better.

[0034] A first aspect of the present invention provides a high-performance, large-section aluminum alloy valve body, wherein the components and their weight percentages in the valve body are as follows:

[0035] Si content is 0.95-1%;

[0036] Fe content ≤ 0.15%;

[0037] Cu content ≤ 0.1%;

[0038] Mn content is 0.55-0.6%;

[0039] Mg content is 0.95-1%;

[0040] Cr content is 0.1-0.15%;

[0041] Zn content is 0-0.1%;

[0042] Ti content is 0.05-0.15%;

[0043] Zr content is 0.1-0.15%;

[0044] The content of other impurity elements is ≤0.05%;

[0045] The total content of other impurity elements is ≤0.15%;

[0046] The remainder is Al;

[0047] Among them, the Mg2Si content is 1.5-1.6%, and the excess Si content is 0.35-0.45%.

[0048] In the present invention, the contents of Mg2Si and excess Si are controlled to avoid the formation of free Si or coarse Al-Fe-Si phases, thereby reducing plasticity; the Cu content is controlled to reduce grain boundary brittleness; the Zr content is controlled to form Al3Zr nanoparticles, inhibit recrystallization, and improve lateral strength; and the Mn and Cr contents are controlled to refine the Al(FeMnCr)Si phase and improve uniformity.

[0049] Fe, Cu, and Zn are for 6082 alloy. Fe is an impurity element. The AlFeSi formed with Al and Si will reduce the plasticity and corrosion resistance of the alloy and promote structural segregation. Excessive Cu will reduce the corrosion resistance of the alloy and may also form complex compounds with other elements, resulting in uneven structure and increased grain boundary brittleness. Too high Zn content will increase the stress corrosion cracking sensitivity of the alloy. The above-mentioned effects on the uniformity of the ingot structure will be further inherited in the final extruded product, so strict control is required in the alloy composition of the present invention.

[0050] A second aspect of the present invention provides a method for preparing the above-mentioned high-performance large-section aluminum alloy valve body, characterized in that the method comprises:

[0051] Casting, homogenization, extrusion, aging treatment;

[0052] The casting conditions include: adding electromagnetic stirring, stirring speed of 350-450r / min, hydrogen content of no more than 0.1cm during casting 3 / 100g, the amount of waste added does not exceed 25%, only the surface of the scrap aluminum substrate is added, continuous casting is used, the cooling rate is 15-20℃ / s, and the solidification time is 3-5min;

[0053] The homogenization treatment conditions include: homogenization treatment at 555-560° C. for 11.5-12.5 hours, and cooling to room temperature at a water cooling rate of 55-65° C. / min.

[0054] In the present invention, the above-mentioned limitation on waste materials reduces the risk of composition instability while lowering costs. The limitation on cooling rate and solidification time can effectively refine the grains and make the structure more uniform.

[0055] In the present invention, high-temperature annealing allows the strengthening phase to be fully integrated into the matrix and dispersed, thereby improving the original structural properties of the cast rod, while slow cooling is conducive to the uniform distribution of the precipitated phase.

[0056] According to the present invention, the extrusion conditions include: a pressure of 61-64 MPa during continuous extrusion, and an extrusion speed of 1.4-1.6 m / min.

[0057] According to the present invention, the extrusion conditions include: using a 4-nozzle cooling water tank and a quenching rate of 45-55°C / s.

[0058] According to the present invention, the extrusion conditions include: mold control temperature of 430-450°C, extrusion ingot temperature of 490-520°C, and extrusion barrel temperature of 440-460°C.

[0059] According to the present invention, the aging treatment system is (122-128°C) x (1-1.25h) + (157-163°C) x (8-8.5h).

[0060] In the present invention, some fine solute atom clusters are formed in the alloy during the first stage aging. These clusters provide nucleation cores for the subsequent precipitation of strengthening phases. The subsequent second stage aging is carried out at a relatively high and appropriate temperature, which can make the strengthening phase grow to a suitable size and make the atoms more active. With these clusters as the core, the strengthening phase (such as Mg2Si phase) can be precipitated more uniformly and dispersedly, and the size of the precipitated phase is smaller, thereby increasing the number and distribution density of the strengthening phase and significantly improving the strength and hardness of the alloy.

[0061] The valve body is tested according to conventional testing methods in the art.

[0062] The technical solution of the present invention is further described in detail below with reference to the accompanying drawings and embodiments. Obviously, the embodiments described herein are only some embodiments of the present invention and are not intended to limit the present invention. Based on the embodiments of the present invention, all other embodiments implemented by those of ordinary skill in the art without making creative improvements are within the scope of protection of the present invention.

[0063] Example 1

[0064] The chemical composition of the alloy is Si: 1.00%, Fe: 0.11%, Cu: 0.04%, Mn: 0.60%, Mg: 0.96%, Cr: 0.13%, Zn: 0.10%, Ti: 0.07%, Zr: 0.11%, Mg2Si content is 1.52%, excess Si content is 0.445%, the individual content of other impurity elements is ≤0.05%; the total content of other impurity elements is ≤0.15%; the balance is Al.

[0065] The total amount of scrap aluminum added is about 20% of the total casting mass, and the hydrogen content is less than 0.2cm 3 / 100g, in the smelting stage, the stirring speed reached 400r / min under the action of external electromagnetic field, and the comparison of dendrite spacing is shown in Table 1. A circulating cooling water channel was added outside the casting mold, the cooling rate was 18℃ / s, the solidification time was 3.5min, and an ultrasonic external field was applied at the same time. Finally, after solidification, it was homogenized at 557℃×12h and cooled to room temperature at a water cooling rate of 62℃ / s.

[0066] The stirring method with external field electromagnetic stirring is adopted, and the dendrite spacing DAS inside the ingot is shown in Table 1.

[0067] Table 1

[0068] The mold control temperature is 446℃, the extrusion ingot temperature is 512℃, the extrusion barrel temperature is 452℃, the extrusion pressure during continuous extrusion is 62Mpa, the product speed is 1.5m / min, a 4-nozzle cooling water tank is used, and the quenching cooling rate is 48℃ / s.

[0069] Aging heat treatment: 126℃×1h+162℃×8.5h.

[0070] An aluminum alloy valve body A1 was produced.

[0071] Example 2

[0072] An aluminum alloy valve body is prepared according to the processing method of Example 1, except that the components of the aluminum alloy are Si: 0.95%, Fe: 0.06%, Cu: 0.03%, Mn: 0.55%, Mg: 0.95%, Cr: 0.1%, Zn: 0%, Ti: 0.05%, Zr: 0.1%, Mg2Si content is 1.50%, and excess Si content is 0.35%.

[0073] An aluminum alloy valve body A2 is produced.

[0074] Example 3

[0075] An aluminum alloy valve body was prepared according to the processing method of Example 1, except that the aluminum alloy components were Si: 1%, Fe: 0.15%, Cu: 0.1%, Mn: 0.6%, Mg: 1%, Cr: 0.15%, Zn: 0.1%, Ti: 0.15%, Zr: 0.15%, Mg2Si content was 1.6%, and excess Si content was 0.45%.

[0076] An aluminum alloy valve body A3 is produced.

[0077] Example 4

[0078] An aluminum alloy valve body was prepared according to the processing method of Example 1, except that the stirring speed was 350 r / min.

[0079] An aluminum alloy valve body A4 is produced.

[0080] Example 5

[0081] An aluminum alloy valve body was prepared according to the processing method of Example 1, except that the stirring speed was 450 r / min.

[0082] An aluminum alloy valve body A5 was produced.

[0083] Example 6

[0084] An aluminum alloy valve body was prepared according to the processing method of Example 1, except that a homogenization treatment was performed at 555° C. for 11.5 h.

[0085] An aluminum alloy valve body A6 was produced.

[0086] Example 7

[0087] An aluminum alloy valve body was prepared according to the processing method of Example 1, except that a homogenization treatment was performed at 560° C. for 12.5 h.

[0088] An aluminum alloy valve body A7 was produced.

[0089] Example 8

[0090] An aluminum alloy valve body was prepared according to the processing method of Example 1, except that the mold control temperature was 430°C, the extrusion ingot temperature was 490°C, the extrusion barrel temperature was 440°C, the extrusion pressure during continuous extrusion was 61 MPa, the product speed was 1.4 m / min, and the quenching cooling rate was 45°C / s.

[0091] An aluminum alloy valve body A8 is produced.

[0092] Example 9

[0093] An aluminum alloy valve body was prepared according to the processing method of Example 1, except that the mold control temperature was 450°C, the extrusion ingot temperature was 520°C, the extrusion barrel temperature was 460°C, the extrusion pressure during continuous extrusion was 64 MPa, the product speed was 1.6 m / min, and the quenching cooling rate was 55°C / s.

[0094] An aluminum alloy valve body A9 was produced.

[0095] Example 10

[0096] An aluminum alloy valve body was prepared according to the processing method of Example 1, except that the aging system was 122° C.×1 h+157° C.×8 h.

[0097] An aluminum alloy valve body A10 was produced.

[0098] Example 11

[0099] An aluminum alloy valve body was prepared according to the processing method of Example 1, except that the aging system was 128°C×1.25h+163°C×8.5h.

[0100] An aluminum alloy valve body A11 was produced.

[0101] Comparative Example 1

[0102] An aluminum alloy valve body is prepared according to the processing method of Example 1, except that the components of the aluminum alloy are Si: 0.85%, Fe: 0.20%, Cu: 0.20%, Mn: 0.50%, Mg: 0.90%, Cr: 0.05%, Zn: 0%, Ti: 0.02%, Zr: 0.05%, Mg2Si content is 1.42%, and excess Si content is 0.33%.

[0103] An aluminum alloy valve body DA1 was produced.

[0104] Comparative Example 2

[0105] An aluminum alloy valve body is prepared according to the processing method of Example 1, except that the components of the aluminum alloy are Si: 1.10%, Fe: 0.20%, Cu: 0.20%, Mn: 0.65%, Mg: 1.05%, Cr: 0.20%, Zn: 0.15%, Ti: 0.20%, Zr: 0.20%, Mg2Si content is 1.66%, and excess Si content is 0.49%.

[0106] An aluminum alloy valve body DA2 was produced.

[0107] Comparative Example 3

[0108] An aluminum alloy valve body was prepared according to the processing method of Example 1, except that the stirring speed was 300 r / min.

[0109] An aluminum alloy valve body DA3 was produced.

[0110] Comparative Example 4

[0111] An aluminum alloy valve body was prepared according to the processing method of Example 1, except that the stirring speed was 500 r / min.

[0112] An aluminum alloy valve body DA4 was produced.

[0113] Comparative Example 5

[0114] An aluminum alloy valve body was prepared according to the processing method of Example 1, except that a homogenization treatment was performed at 545° C. for 10 h.

[0115] An aluminum alloy valve body DA5 was produced.

[0116] Comparative Example 6

[0117] An aluminum alloy valve body was prepared according to the processing method of Example 1, except that a homogenization treatment was performed at 565° C. for 13 h.

[0118] Aluminum alloy valve body DA6 was produced.

[0119] Comparative Example 7

[0120] An aluminum alloy valve body was prepared according to the processing method of Example 1, except that the mold control temperature was 420°C, the extrusion ingot temperature was 480°C, the extrusion barrel temperature was 430°C, the extrusion pressure during continuous extrusion was 55 MPa, the product speed was 1.2 m / min, and the quenching cooling rate was 30°C / s.

[0121] An aluminum alloy valve body DA7 was produced.

[0122] Comparative Example 8

[0123] An aluminum alloy valve body was prepared according to the processing method of Example 1, except that the mold control temperature was 460°C, the extrusion ingot temperature was 530°C, the extrusion barrel temperature was 470°C, the extrusion pressure during continuous extrusion was 68 MPa, the product speed was 2.0 m / min, and the quenching cooling rate was 65°C / s.

[0124] An aluminum alloy valve body A8 is produced.

[0125] Comparative Example 9

[0126] An aluminum alloy valve body was prepared according to the processing method of Example 1, except that the aging system was 115°C×0.8h+150°C×7h.

[0127] Aluminum alloy valve body DA9 was produced.

[0128] Comparative Example 10

[0129] An aluminum alloy valve body was prepared according to the processing method of Example 1, except that the aging system was 135°C×1.5h+170°C×9.5h.

[0130] An aluminum alloy valve body DA10 was produced.

[0131] Perform performance tests on A1-A11 and DA1-DA10.

[0132] In transverse mechanics, side 1 corresponds to the instruction manual Figure 2 The number 1 in the figure and the edge 2 correspond to the Figure 2 The reference numeral 4 in the figure corresponds to the core 1 in the specification. Figure 2 The reference number 2 in the figure corresponds to the core 2 in the specification. Figure 2 Number 3 in the .

[0133] Example 1

[0134] Horizontal Mechanics:

[0135] Edge 1: yield strength 313Mpa, tensile strength 340Mpa, elongation A: 8.5%;

[0136] Edge 2: yield strength 313 MPa, tensile strength 342 MPa, elongation A: 9.0%;

[0137] Core 1: yield strength 311 MPa, tensile strength 344 MPa, elongation A: 8.5%;

[0138] Core 2: yield strength 309Mpa, tensile strength 343Mpa, elongation A: 9.5%

[0139] Longitudinal Mechanics:

[0140] Side 1: yield strength 312Mpa, tensile strength 339Mpa, elongation A: 17.0%; Side 2: yield strength 307Mpa, tensile strength 337Mpa, elongation A: 16.5%; Side 3: yield strength 325Mpa, tensile strength 351Mpa, elongation A: 17.0%; Side 4: yield strength 326Mpa, tensile strength 349Mpa, elongation A: 15.0%; Side 6: yield strength 319Mpa, tensile strength 342Mpa a, elongation A: 16.0%; Edge 7: yield strength 318 MPa, tensile strength 344 MPa, elongation A: 16.0%; Edge 8: yield strength 305 MPa, tensile strength 335 MPa, elongation A: 15.0%; Edge 9: yield strength 330 MPa, tensile strength 355 MPa, elongation A: 18.0%; Core 5: yield strength 364 MPa, tensile strength 391 MPa, elongation A: 14.0%; Hardness measured 107 HBW;

[0141] The measured conductivity is 25.65MS / m.

[0142] No coarse crystals.

[0143] Example 2

[0144] Horizontal Mechanics:

[0145] Edge 1: yield strength 303Mpa, tensile strength 330Mpa, elongation A: 8.0%; Edge 2: yield strength 303Mpa, tensile strength 332Mpa, elongation A: 8.5%; Core 1: yield strength 301Mpa, tensile strength 334Mpa, elongation A: 8.5%; Core 2: yield strength 302Mpa, tensile strength 333Mpa, elongation A: 8.5% Longitudinal mechanics:

[0146] Side 1: yield strength 302Mpa, tensile strength 329Mpa, elongation A: 14.0%; Side 2: yield strength 307Mpa, tensile strength 327Mpa, elongation A: 14.5%; Side 3: yield strength 305Mpa, tensile strength 331Mpa, elongation A: 15.0%; Side 4: yield strength 306Mpa, tensile strength 329Mpa, elongation A: 15.0%; Side 6: yield strength 311Mpa, tensile strength 332Mpa a, elongation A: 15.0%; Edge 7: yield strength 308 MPa, tensile strength 334 MPa, elongation A: 14.0%; Edge 8: yield strength 305 MPa, tensile strength 325 MPa, elongation A: 15.0%; Edge 9: yield strength 310 MPa, tensile strength 335 MPa, elongation A: 16.0%; Core 5: yield strength 324 MPa, tensile strength 341 MPa, elongation A: 15.0%; Hardness measured 103 HBW;

[0147] The measured conductivity is 25.95MS / m.

[0148] Coarse grain 0.5mm.

[0149] Example 3

[0150] Horizontal Mechanics:

[0151] Edge 1: yield strength 323Mpa, tensile strength 350Mpa, elongation A: 8.0%; Edge 2: yield strength 323Mpa, tensile strength 352Mpa, elongation A: 8.5%; Core 1: yield strength 321Mpa, tensile strength 354Mpa, elongation A: 8.5%; Core 2: yield strength 329Mpa, tensile strength 353Mpa, elongation A: 8.0% Longitudinal mechanics:

[0152] Side 1: yield strength 322Mpa, tensile strength 349Mpa, elongation A: 17.0%; Side 2: yield strength 327Mpa, tensile strength 347Mpa, elongation A: 17.5%; Side 3: yield strength 325Mpa, tensile strength 351Mpa, elongation A: 17.0%; Side 4: yield strength 326Mpa, tensile strength 349Mpa, elongation A: 16.0%; Side 6: yield strength 329Mpa, tensile strength 352Mpa a, elongation A: 16.5%; Edge 7: yield strength 328Mpa, tensile strength 346Mpa, elongation A: 16.5%; Edge 8: yield strength 315Mpa, tensile strength 340Mpa, elongation A: 15.5%; Edge 9: yield strength 340Mpa, tensile strength 365Mpa, elongation A: 18.5%; Core 5: yield strength 364Mpa, tensile strength 381Mpa, elongation A: 15.0%; Hardness measured 108HBW;

[0153] The measured conductivity is 24.43MS / m.

[0154] Coarse grain 0.3mm.

[0155] Example 4

[0156] Horizontal Mechanics:

[0157] Edge 1: yield strength 310Mpa, tensile strength 334Mpa, elongation A: 8.0%; Edge 2: yield strength 309Mpa, tensile strength 339Mpa, elongation A: 9.0%; Core 1: yield strength 306Mpa, tensile strength 336Mpa, elongation A: 8.0%; Core 2: yield strength 311Mpa, tensile strength 340Mpa, elongation A: 9.0% Longitudinal mechanics:

[0158] Side 1: yield strength 310Mpa, tensile strength 334Mpa, elongation A: 16.0%; Side 2: yield strength 304Mpa, tensile strength 332Mpa, elongation A: 16.0%; Side 3: yield strength 315Mpa, tensile strength 341Mpa, elongation A: 16.0%; Side 4: yield strength 316Mpa, tensile strength 344Mpa, elongation A: 15.5%; Side 6: yield strength 309Mpa, tensile strength 340Mpa a, elongation A: 16.5%; Edge 7: yield strength 312Mpa, tensile strength 344Mpa, elongation A: 15.0%; Edge 8: yield strength 306Mpa, tensile strength 332Mpa, elongation A: 15.0%; Edge 9: yield strength 320Mpa, tensile strength 347Mpa, elongation A: 16.5%; Core 5: yield strength 344Mpa, tensile strength 371Mpa, elongation A: 14.0%; Hardness measured 104HBW;

[0159] The measured conductivity is 25.83MS / m.

[0160] Coarse grain 0.4mm.

[0161] Example 5

[0162] Horizontal Mechanics:

[0163] Edge 1: yield strength 315Mpa, tensile strength 343Mpa, elongation A: 8.5%; Edge 2: yield strength 316Mpa, tensile strength 341Mpa, elongation A: 9.5%; Core 1: yield strength 312Mpa, tensile strength 346Mpa, elongation A: 9.0%; Core 2: yield strength 310Mpa, tensile strength 347Mpa, elongation A: 9.5% Longitudinal mechanics:

[0164] Side 1: yield strength 314Mpa, tensile strength 341Mpa, elongation A: 17.0%; Side 2: yield strength 310Mpa, tensile strength 340Mpa, elongation A: 17.0%; Side 3: yield strength 327Mpa, tensile strength 350Mpa, elongation A: 17.0%; Side 4: yield strength 329Mpa, tensile strength 351Mpa, elongation A: 15.5%; Side 6: yield strength 322Mpa, tensile strength 344Mpa a, elongation A: 16.5%; Edge 7: yield strength 322Mpa, tensile strength 345Mpa, elongation A: 16.0%; Edge 8: yield strength 314Mpa, tensile strength 340Mpa, elongation A: 15.5%; Edge 9: yield strength 333Mpa, tensile strength 356Mpa, elongation A: 18.0%; Core 5: yield strength 365Mpa, tensile strength 394Mpa, elongation A: 15.0%; Hardness measured 108HBW;

[0165] The measured conductivity is 25.32MS / m.

[0166] Coarse grain 0.3mm.

[0167] Example 6

[0168] Horizontal Mechanics:

[0169] Edge 1: yield strength 309 MPa, tensile strength 338 MPa, elongation A: 8.5%; Edge 2: yield strength 308 MPa, tensile strength 340 MPa, elongation A: 8.5%; Core 1: yield strength 310 MPa, tensile strength 341 MPa, elongation A: 8.5%; Core 2: yield strength 309 MPa, tensile strength 340 MPa, elongation A: 9.0% Longitudinal mechanics:

[0170] Side 1: yield strength 306Mpa, tensile strength 333Mpa, elongation A: 16.0%; Side 2: yield strength 307Mpa, tensile strength 331Mpa, elongation A: 16.0%; Side 3: yield strength 318Mpa, tensile strength 341Mpa, elongation A: 16.5%; Side 4: yield strength 320Mpa, tensile strength 345Mpa, elongation A: 15.0%; Side 6: yield strength 313Mpa, tensile strength 339Mpa a, elongation A: 15.5%; Edge 7: yield strength 311Mpa, tensile strength 340Mpa, elongation A: 16.0%; Edge 8: yield strength 308Mpa, tensile strength 331Mpa, elongation A: 14.5%; Edge 9: yield strength 320Mpa, tensile strength 345Mpa, elongation A: 17.0%; Core 5: yield strength 344Mpa, tensile strength 368Mpa, elongation A: 14.0%; Hardness measured 102HBW;

[0171] The measured conductivity is 25.15MS / m.

[0172] Coarse grain 0.2mm.

[0173] Example 7

[0174] Horizontal Mechanics:

[0175] Edge 1: yield strength 316Mpa, tensile strength 350Mpa, elongation A: 8.5%; Edge 2: yield strength 318Mpa, tensile strength 349Mpa, elongation A: 9.5%; Core 1: yield strength 318Mpa, tensile strength 348Mpa, elongation A: 9.0%; Core 2: yield strength 319Mpa, tensile strength 349Mpa, elongation A: 9.5% Longitudinal mechanics:

[0176] Side 1: yield strength 316Mpa, tensile strength 346Mpa, elongation A: 17.5%; Side 2: yield strength 317Mpa, tensile strength 347Mpa, elongation A: 17.0%; Side 3: yield strength 330Mpa, tensile strength 355Mpa, elongation A: 17.5%; Side 4: yield strength 337Mpa, tensile strength 358Mpa, elongation A: 16.0%; Side 6: yield strength 324Mpa, tensile strength 349Mpa a, elongation A: 16.5%; Edge 7: yield strength 326Mpa, tensile strength 348Mpa, elongation A: 16.5%; Edge 8: yield strength 319Mpa, tensile strength 345Mpa, elongation A: 15.5%; Edge 9: yield strength 341Mpa, tensile strength 358Mpa, elongation A: 18.0%; Core 5: yield strength 369Mpa, tensile strength 395Mpa, elongation A: 15.0%; Hardness measured 108HBW;

[0177] The measured conductivity is 24.85MS / m.

[0178] Coarse grain 0.4mm.

[0179] Example 8

[0180] Horizontal Mechanics:

[0181] Edge 1: yield strength 310Mpa, tensile strength 339Mpa, elongation A: 8.0%; Edge 2: yield strength 311Mpa, tensile strength 340Mpa, elongation A: 8.5%; Core 1: yield strength 309Mpa, tensile strength 338Mpa, elongation A: 9.0%; Core 2: yield strength 310Mpa, tensile strength 335Mpa, elongation A: 9.0% Longitudinal mechanics:

[0182] Side 1: yield strength 310Mpa, tensile strength 335Mpa, elongation A: 16.5%; Side 2: yield strength 306Mpa, tensile strength 332Mpa, elongation A: 16.0%; Side 3: yield strength 319Mpa, tensile strength 344Mpa, elongation A: 17.0%; Side 4: yield strength 320Mpa, tensile strength 346Mpa, elongation A: 15.5%; Side 6: yield strength 311Mpa, tensile strength 333Mpa a, elongation A: 16.0%; Edge 7: yield strength 312Mpa, tensile strength 337Mpa, elongation A: 16.5%; Edge 8: yield strength 304Mpa, tensile strength 328Mpa, elongation A: 15.5%; Edge 9: yield strength 324Mpa, tensile strength 353Mpa, elongation A: 16.5%; Core 5: yield strength 355Mpa, tensile strength 385Mpa, elongation A: 14.5%; Hardness measured 104HBW;

[0183] The measured conductivity is 25.31MS / m.

[0184] Coarse grain 0.3mm.

[0185] Example 9

[0186] Horizontal Mechanics:

[0187] Edge 1: yield strength 316Mpa, tensile strength 340Mpa, elongation A: 8.5%; Edge 2: yield strength 318Mpa, tensile strength 342Mpa, elongation A: 9.0%; Core 1: yield strength 315Mpa, tensile strength 344Mpa, elongation A: 8.5%; Core 2: yield strength 314Mpa, tensile strength 343Mpa, elongation A: 9.5% Longitudinal mechanics:

[0188] Side 1: yield strength 318Mpa, tensile strength 342Mpa, elongation A: 17.0%; Side 2: yield strength 317Mpa, tensile strength 345Mpa, elongation A: 17.5%; Side 3: yield strength 328Mpa, tensile strength 355Mpa, elongation A: 17.0%; Side 4: yield strength 326Mpa, tensile strength 354Mpa, elongation A: 16.0%; Side 6: yield strength 329Mpa, tensile strength 348Mpa a, elongation A: 16.5%; Edge 7: yield strength 325Mpa, tensile strength 347Mpa, elongation A: 16.5%; Edge 8: yield strength 315Mpa, tensile strength 343Mpa, elongation A: 16.0%; Edge 9: yield strength 335Mpa, tensile strength 346Mpa, elongation A: 17.5%; Core 5: yield strength 368Mpa, tensile strength 395Mpa, elongation A: 15.0%; Hardness measured 108HBW;

[0189] The measured conductivity is 25.25MS / m.

[0190] Coarse grain 0.4mm.

[0191] Example 10

[0192] Horizontal Mechanics:

[0193] Edge 1: yield strength 306Mpa, tensile strength 338Mpa, elongation A: 9.5%; Edge 2: yield strength 305Mpa, tensile strength 336Mpa, elongation A: 9.0%; Core 1: yield strength 308Mpa, tensile strength 333Mpa, elongation A: 9.0%; Core 2: yield strength 309Mpa, tensile strength 340Mpa, elongation A: 9.5% Longitudinal mechanics:

[0194] Side 1: yield strength 308Mpa, tensile strength 329Mpa, elongation A: 17.0%; Side 2: yield strength 307Mpa, tensile strength 327Mpa, elongation A: 17.0%; Side 3: yield strength 312Mpa, tensile strength 336Mpa, elongation A: 17.5%; Side 4: yield strength 314Mpa, tensile strength 331Mpa, elongation A: 16.0%; Side 6: yield strength 311Mpa, tensile strength 338Mpa a, elongation A: 17.0%; Edge 7: yield strength 313Mpa, tensile strength 337Mpa, elongation A: 16.5%; Edge 8: yield strength 303Mpa, tensile strength 328Mpa, elongation A: 16.0%; Edge 9: yield strength 319Mpa, tensile strength 341Mpa, elongation A: 18.0%; Core 5: yield strength 336Mpa, tensile strength 366Mpa, elongation A: 15.5%; Hardness measured 104HBW;

[0195] The measured conductivity is 25.72MS / m.

[0196] Coarse grain 0.4mm.

[0197] Example 11

[0198] Horizontal Mechanics:

[0199] Edge 1: yield strength 319 MPa, tensile strength 346 MPa, elongation A: 8.5%; Edge 2: yield strength 321 MPa, tensile strength 344 MPa, elongation A: 8.5%; Core 1: yield strength 320 MPa, tensile strength 348 MPa, elongation A: 8.5%; Core 2: yield strength 318 MPa, tensile strength 345 MPa, elongation A: 9.0% Longitudinal mechanics:

[0200] Side 1: yield strength 319Mpa, tensile strength 342Mpa, elongation A: 17.0%; Side 2: yield strength 317Mpa, tensile strength 344Mpa, elongation A: 17.0%; Side 3: yield strength 326Mpa, tensile strength 356Mpa, elongation A: 16.5%; Side 4: yield strength 328Mpa, tensile strength 355Mpa, elongation A: 15.5%; Side 6: yield strength 322Mpa, tensile strength 353Mpa a, elongation A: 16.5%; Edge 7: yield strength 327Mpa, tensile strength 352Mpa, elongation A: 15.5%; Edge 8: yield strength 318Mpa, tensile strength 346Mpa, elongation A: 15.5%; Edge 9: yield strength 336Mpa, tensile strength 361Mpa, elongation A: 16.5%; Core 5: yield strength 365Mpa, tensile strength 382Mpa, elongation A: 14.5%; Hardness measured 109HBW;

[0201] The measured conductivity is 25.11MS / m.

[0202] Coarse grain 0.4mm.

[0203] Comparative Example 1

[0204] Horizontal Mechanics:

[0205] Edge 1: yield strength 283Mpa, tensile strength 316Mpa, elongation A: 7.5%; Edge 2: yield strength 289Mpa, tensile strength 314Mpa, elongation A: 8.0%; Core 1: yield strength 291Mpa, tensile strength 320Mpa, elongation A: 7.0%; Core 2: yield strength 293Mpa, tensile strength 319Mpa, elongation A: 7.5% Longitudinal mechanics:

[0206] Side 1: yield strength 296Mpa, tensile strength 322Mpa, elongation A: 14.5%; Side 2: yield strength 294Mpa, tensile strength 318Mpa, elongation A: 16.0%; Side 3: yield strength 303Mpa, tensile strength 326Mpa, elongation A: 14.5%; Side 4: yield strength 296Mpa, tensile strength 317Mpa, elongation A: 15.0%; Side 6: yield strength 301Mpa, tensile strength 333Mpa a, elongation A: 16.0%; Edge 7: yield strength 291Mpa, tensile strength 316Mpa, elongation A: 14.5%; Edge 8: yield strength 289Mpa, tensile strength 308Mpa, elongation A: 14.0%; Edge 9: yield strength 296Mpa, tensile strength 321Mpa, elongation A: 15.5%; Core 5: yield strength 321Mpa, tensile strength 342Mpa, elongation A: 15.0%; Hardness measured 101HBW;

[0207] The measured conductivity is 27.35MS / m.

[0208] Coarse grain 1mm.

[0209] Comparative Example 2

[0210] Horizontal Mechanics:

[0211] Edge 1: yield strength 323Mpa, tensile strength 346Mpa, elongation A: 7.0%; Edge 2: yield strength 331Mpa, tensile strength 354Mpa, elongation A: 7.5%; Core 1: yield strength 333Mpa, tensile strength 352Mpa, elongation A: 7.0%; Core 2: yield strength 330Mpa, tensile strength 349Mpa, elongation A: 7.5% Longitudinal mechanics:

[0212] Side 1: yield strength 333Mpa, tensile strength 354Mpa, elongation A: 12.5%; Side 2: yield strength 335Mpa, tensile strength 356Mpa, elongation A: 14.0%; Side 3: yield strength 337Mpa, tensile strength 355Mpa, elongation A: 14.5%; Side 4: yield strength 329Mpa, tensile strength 358Mpa, elongation A: 13.0%; Side 6: yield strength 334Mpa, tensile strength 354Mpa a, elongation A: 13.5%; Edge 7: yield strength 331 MPa, tensile strength 351 MPa, elongation A: 14.5%; Edge 8: yield strength 337 MPa, tensile strength 356 MPa, elongation A: 14.0%; Edge 9: yield strength 341 MPa, tensile strength 365 MPa, elongation A: 14.5%; Core 5: yield strength 359 MPa, tensile strength 382 MPa, elongation A: 15.0%; Hardness measured 110 HBW;

[0213] The measured conductivity is 23.95MS / m.

[0214] No coarse crystals.

[0215] Comparative Example 3

[0216] Horizontal Mechanics:

[0217] Edge 1: yield strength 296Mpa, tensile strength 321Mpa, elongation A: 7.0%; Edge 2: yield strength 293Mpa, tensile strength 319Mpa, elongation A: 7.5%; Core 1: yield strength 321Mpa, tensile strength 342Mpa, elongation A: 7.0%; Core 2: yield strength 323Mpa, tensile strength 344Mpa, elongation A: 7.5% Longitudinal mechanics:

[0218] Side 1: yield strength 313Mpa, tensile strength 334Mpa, elongation A: 13.5%; Side 2: yield strength 315Mpa, tensile strength 338Mpa, elongation A: 13.0%; Side 3: yield strength 317Mpa, tensile strength 345Mpa, elongation A: 13.5%; Side 4: yield strength 319Mpa, tensile strength 351Mpa, elongation A: 14.0%; Side 6: yield strength 324Mpa, tensile strength 354Mpa a, elongation A: 13.5%; Edge 7: yield strength 321Mpa, tensile strength 352Mpa, elongation A: 14.0%; Edge 8: yield strength 327Mpa, tensile strength 356Mpa, elongation A: 14.0%; Edge 9: yield strength 321Mpa, tensile strength 353Mpa, elongation A: 14.0%; Core 5: yield strength 349Mpa, tensile strength 372Mpa, elongation A: 14.5%; Hardness measured 104HBW;

[0219] The measured conductivity is 26.42MS / m.

[0220] Coarse grain 0.7mm.

[0221] Comparative Example 4

[0222] Horizontal Mechanics:

[0223] Edge 1: yield strength 316Mpa, tensile strength 341Mpa, elongation A: 7.5%; Edge 2: yield strength 317Mpa, tensile strength 343Mpa, elongation A: 8.5%; Core 1: yield strength 321Mpa, tensile strength 342Mpa, elongation A: 8.0%; Core 2: yield strength 333Mpa, tensile strength 354Mpa, elongation A: 7.0% Longitudinal mechanics:

[0224] Side 1: yield strength 323Mpa, tensile strength 342Mpa, elongation A: 13.0%; Side 2: yield strength 325Mpa, tensile strength 348Mpa, elongation A: 13.0%; Side 3: yield strength 316Mpa, tensile strength 344Mpa, elongation A: 13.0%; Side 4: yield strength 319Mpa, tensile strength 351Mpa, elongation A: 14.0%; Side 6: yield strength 327Mpa, tensile strength 355Mpa a, elongation A: 13.5%; Edge 7: yield strength 324Mpa, tensile strength 354Mpa, elongation A: 14.5%; Edge 8: yield strength 336Mpa, tensile strength 356Mpa, elongation A: 14.5%; Edge 9: yield strength 331Mpa, tensile strength 356Mpa, elongation A: 12.5%; Core 5: yield strength 352Mpa, tensile strength 378Mpa, elongation A: 13.5%; Hardness measured 109HBW;

[0225] The measured conductivity is 24.62MS / m.

[0226] Coarse grain 0.2mm.

[0227] Comparative Example 5

[0228] Horizontal Mechanics:

[0229] Edge 1: yield strength 289 MPa, tensile strength 321 MPa, elongation A: 8.0%; Edge 2: yield strength 285 MPa, tensile strength 318 MPa, elongation A: 8.5%; Core 1: yield strength 306 MPa, tensile strength 332 MPa, elongation A: 8.5%; Core 2: yield strength 309 MPa, tensile strength 329 MPa, elongation A: 8.5% Longitudinal mechanics:

[0230] Side 1: yield strength 306Mpa, tensile strength 332Mpa, elongation A: 13.5%; Side 2: yield strength 305Mpa, tensile strength 328Mpa, elongation A: 13.5%; Side 3: yield strength 304Mpa, tensile strength 324Mpa, elongation A: 13.0%; Side 4: yield strength 318Mpa, tensile strength 341Mpa, elongation A: 14.5%; Side 6: yield strength 312Mpa, tensile strength 334Mpa a, elongation A: 13.0%; Edge 7: yield strength 311Mpa, tensile strength 336Mpa, elongation A: 14.0%; Edge 8: yield strength 309Mpa, tensile strength 330Mpa, elongation A: 12.5%; Edge 9: yield strength 321Mpa, tensile strength 346Mpa, elongation A: 12.5%; Core 5: yield strength 342Mpa, tensile strength 372Mpa, elongation A: 13.0%; Hardness measured 102HBW;

[0231] The measured conductivity is 26.12MS / m.

[0232] No coarse crystals.

[0233] Comparative Example 6

[0234] Horizontal Mechanics:

[0235] Edge 1: yield strength 289 MPa, tensile strength 321 MPa, elongation A: 7.0%; Edge 2: yield strength 285 MPa, tensile strength 318 MPa, elongation A: 6.5%; Core 1: yield strength 304 MPa, tensile strength 322 MPa, elongation A: 7.5%; Core 2: yield strength 302 MPa, tensile strength 325 MPa, elongation A: 7.5% Longitudinal mechanics:

[0236] Side 1: yield strength 286Mpa, tensile strength 312Mpa, elongation A: 12.5%; Side 2: yield strength 295Mpa, tensile strength 318Mpa, elongation A: 12.5%; Side 3: yield strength 294Mpa, tensile strength 314Mpa, elongation A: 12.0%; Side 4: yield strength 298Mpa, tensile strength 321Mpa, elongation A: 12.5%; Side 6: yield strength 302Mpa, tensile strength 324M pa, elongation A: 11.0%; Edge 7: yield strength 304Mpa, tensile strength 326Mpa, elongation A: 13.0%; Edge 8: yield strength 299Mpa, tensile strength 320Mpa, elongation A: 13.5%; Edge 9: yield strength 311Mpa, tensile strength 336Mpa, elongation A: 11.5%; Core 5: yield strength 320Mpa, tensile strength 342Mpa, elongation A: 12.0%; hardness measured 99HBW;

[0237] The measured conductivity is 25.52MS / m.

[0238] Coarse grain 0.8mm.

[0239] Comparative Example 7

[0240] Horizontal Mechanics:

[0241] Edge 1: yield strength 285Mpa, tensile strength 311Mpa, elongation A: 8.0%; Edge 2: yield strength 295Mpa, tensile strength 318Mpa, elongation A: 8.5%; Core 1: yield strength 296Mpa, tensile strength 322Mpa, elongation A: 7.5%; Core 2: yield strength 304Mpa, tensile strength 329Mpa, elongation A: 8.5% Longitudinal mechanics:

[0242] Side 1: yield strength 302Mpa, tensile strength 330Mpa, elongation A: 14.5%; Side 2: yield strength 305Mpa, tensile strength 328Mpa, elongation A: 15.5%; Side 3: yield strength 306Mpa, tensile strength 326Mpa, elongation A: 14.0%; Side 4: yield strength 312Mpa, tensile strength 339Mpa, elongation A: 15.5%; Side 6: yield strength 314Mpa, tensile strength 335Mpa a, elongation A: 14.0%; Edge 7: yield strength 318Mpa, tensile strength 340Mpa, elongation A: 14.5%; Edge 8: yield strength 319Mpa, tensile strength 343Mpa, elongation A: 14.5%; Edge 9: yield strength 316Mpa, tensile strength 341Mpa, elongation A: 13.5%; Core 5: yield strength 332Mpa, tensile strength 370Mpa, elongation A: 13.5%; Hardness measured 105HBW;

[0243] The measured conductivity is 25.82MS / m.

[0244] Coarse grain 0.3mm.

[0245] Comparative Example 8

[0246] Horizontal Mechanics:

[0247] Edge 1: yield strength 312 MPa, tensile strength 337 MPa, elongation A: 7.0%; Edge 2: yield strength 311 MPa, tensile strength 338 MPa, elongation A: 7.5%; Core 1: yield strength 314 MPa, tensile strength 342 MPa, elongation A: 8.5%; Core 2: yield strength 321 MPa, tensile strength 345 MPa, elongation A: 9.5% Longitudinal mechanics:

[0248] Side 1: yield strength 316Mpa, tensile strength 333Mpa, elongation A: 13.5%; Side 2: yield strength 315Mpa, tensile strength 329Mpa, elongation A: 14.5%; Side 3: yield strength 316Mpa, tensile strength 329Mpa, elongation A: 14.5%; Side 4: yield strength 312Mpa, tensile strength 334Mpa, elongation A: 15.0%; Side 6: yield strength 314Mpa, tensile strength 336Mpa a, elongation A: 14.5%; Edge 7: yield strength 318Mpa, tensile strength 341Mpa, elongation A: 14.0%; Edge 8: yield strength 319Mpa, tensile strength 345Mpa, elongation A: 14.0%; Edge 9: yield strength 316Mpa, tensile strength 342Mpa, elongation A: 14.5%; Core 5: yield strength 332Mpa, tensile strength 373Mpa, elongation A: 14.0%; Hardness measured 108HBW;

[0249] The measured conductivity is 25.41MS / m.

[0250] Coarse grain 0.5mm.

[0251] Comparative Example 9

[0252] Horizontal Mechanics:

[0253] Edge 1: yield strength 282Mpa, tensile strength 313Mpa, elongation A: 9.0%; Edge 2: yield strength 286Mpa, tensile strength 318Mpa, elongation A: 9.5%; Core 1: yield strength 294Mpa, tensile strength 319Mpa, elongation A: 8.5%; Core 2: yield strength 298Mpa, tensile strength 321Mpa, elongation A: 9.5% Longitudinal mechanics:

[0254] Side 1: yield strength 283Mpa, tensile strength 313Mpa, elongation A: 16.0%; Side 2: yield strength 286Mpa, tensile strength 316Mpa, elongation A: 15.5%; Side 3: yield strength 282Mpa, tensile strength 310Mpa, elongation A: 15.0%; Side 4: yield strength 291Mpa, tensile strength 311Mpa, elongation A: 15.5%; Side 6: yield strength 294Mpa, tensile strength 324M pa, elongation A: 14.5%; Edge 7: yield strength 289Mpa, tensile strength 312Mpa, elongation A: 15.0%; Edge 8: yield strength 291Mpa, tensile strength 322Mpa, elongation A: 15.0%; Edge 9: yield strength 284Mpa, tensile strength 309Mpa, elongation A: 15.5%; Core 5: yield strength 312Mpa, tensile strength 343Mpa, elongation A: 16.0%; hardness measured 98HBW;

[0255] The measured conductivity is 26.33MS / m.

[0256] Coarse grain 0.4mm.

[0257] Comparative Example 10

[0258] Horizontal Mechanics:

[0259] Edge 1: yield strength 310Mpa, tensile strength 333Mpa, elongation A: 7.0%; Edge 2: yield strength 314Mpa, tensile strength 338Mpa, elongation A: 7.5%; Core 1: yield strength 318Mpa, tensile strength 342Mpa, elongation A: 8.5%;

[0260] Core 2: Yield strength 321Mpa, tensile strength 341Mpa, elongation A: 9.0%

[0261] Longitudinal Mechanics:

[0262] Edge 1: yield strength 321Mpa, tensile strength 343Mpa, elongation A: 13.0%;

[0263] Edge 2: yield strength 324Mpa, tensile strength 346Mpa, elongation A: 13.5%;

[0264] Edge 3: yield strength 326Mpa, tensile strength 350Mpa, elongation A: 13.0%;

[0265] Edge 4: yield strength 330 MPa, tensile strength 349 MPa, elongation A: 14.5%;

[0266] Edge 6: yield strength 324Mpa, tensile strength 344Mpa, elongation A: 13.5%;

[0267] Edge 7: yield strength 319 MPa, tensile strength 348 MPa, elongation A: 14.0%;

[0268] Edge 8: yield strength 325Mpa, tensile strength 352Mpa, elongation A: 14.0%;

[0269] Edge 9: yield strength 328Mpa, tensile strength 354Mpa, elongation A: 13.5%;

[0270] Core 5: yield strength 351 MPa, tensile strength 383 MPa, elongation A: 14.0%;

[0271] The hardness is measured to be 108HBW;

[0272] The measured conductivity is 25.28MS / m.

[0273] Coarse grain 0.4mm.

[0274] By comparing the examples with the comparative examples, it can be seen that the valve body designed in the present invention has excellent and uniform mechanical properties at the edges and the core in both the transverse and longitudinal directions, and also has excellent hardness and electrical conductivity.

[0275] The above description is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, can make equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A high performance large cross-section aluminum alloy valve body, characterized in that: The components and their weight percentages in the valve body are: Si content is 0.95-1%; Fe content ≤ 0.15%; Cu content ≤ 0.10%; Mn content is 0.55-0.6%; Mg content is 0.95-1.00%; Cr content is 0.10-0.15%; Zn content is 0-0.10%; Ti content is 0.05-0.15%; Zr content is 0.10-0.15%; The content of other impurity elements is ≤0.05%; The total content of other impurity elements is ≤0.15%; The remainder is Al; Among them, the Mg2Si content is 1.5-1.6%, and the excess Si content is 0.35-0.45%.

2. A method for preparing the high-performance large-section aluminum alloy valve body according to claim 1, characterized in that: The method comprises: Casting, homogenization, extrusion, aging treatment; The casting conditions include: adding electromagnetic stirring, stirring speed of 350-450r / min, hydrogen content of no more than 0.1cm during casting 3 / 100g, the amount of waste added does not exceed 25%, only the surface of the scrap aluminum substrate is added, continuous casting is used, the cooling rate is 15-20℃ / s, and the solidification time is 3-5min; The homogenization treatment conditions include: homogenization treatment at 555-560° C. for 11.5-12.5 hours, and cooling to room temperature at a water cooling rate of 55-65° C. / min.

3. The method according to claim 2, characterized in that The extrusion conditions include: a pressure of 61-64 MPa during continuous extrusion, and an extrusion speed of 1.4-1.6 m / min.

4. The method according to claim 2, characterized in that The extrusion conditions include: using a 4-nozzle cooling water tank and a quenching speed of 45-55°C / s.

5. The method according to claim 2, characterized in that The extrusion conditions include: mold control temperature of 430-450°C, extrusion ingot temperature of 490-520°C, and extrusion barrel temperature of 440-460°C.

6. The method according to claim 2, characterized in that The aging treatment system is (122-128°C)x(1-1.25h)+(157-163°C)x(8-8.5h).

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