A high resistivity titanium alloy material for hot cutting knife of laminating machine and manufacturing method thereof

Abstract

The present invention discloses a high resistivity titanium alloy material for a hot cutter of a laminating machine and a manufacturing method thereof, wherein the titanium alloy material comprises the following components in percentage by mass: Sn 10.0-16.0%, Cr 3.0-10.0%, and the remainder is Ti and unavoidable impurities. The manufacturing method of the titanium alloy material is to prepare a plate with a thickness of 0.5 mm-4.0 mm by smelting, forging or rolling according to the component system and mass ratio of the titanium alloy material; then the plate is subjected to multiple annealing heat treatments to adjust the structure, improve the resistivity and tensile properties; and finally the plate is cut to obtain the required size. The titanium alloy material of the present invention has high resistivity and high strength, and the hot cutter of the laminating machine produced can greatly improve the film cutting efficiency and improve the stability of the equipment.

Description

Technical Field

[0001] The invention relates to the technical field of manufacturing titanium alloys, and in particular to a high-resistivity titanium alloy material for a hot cutter of a laminating machine and a manufacturing method thereof. Background Art

[0002] Laminating machine is a key equipment in the printing and packaging industry chain, and the hot cutter is an important part of the laminating machine. When the hot cutter is working, it generates a high temperature of 300℃-600℃ under the applied current. The plastic film is melted under high temperature and then cut without burrs. It can also accurately control the cutting accuracy and improve the cutting efficiency.

[0003] The premature cracking of hot cutters is a bottleneck technical problem faced by domestic laminating machines. Hot cutters of domestic laminating machines are generally made of stainless steel. The local temperature of the hot cutters can reach over 600°C, but the forced cooling and heat dissipation of the fixture in the tool clamping and other parts is only 300°C. The temperature difference between different parts, thermal stress and cyclic stress during film cutting are superimposed, and the risk of fatigue failure is significantly increased. In addition, the long-term operation of 304 stainless steel at 600°C may cause the precipitation of harmful phases and surface oxidation, which may also lead to material embrittlement, and then cause the hot cutter to break prematurely. At present, laminating machines generally work continuously, but because hot cutters are prone to premature cracking, their service life is only 3-5 days. Therefore, once cracked, they will have to be stopped for replacement. In addition, the uncertainty of the cracking location and cracking time will cause great economic losses. Summary of the invention

[0004] The purpose of the present invention is to provide a high resistivity titanium alloy material for a thermal cutter of a laminating machine and a manufacturing method thereof. The titanium alloy material of the present invention has high resistivity and high strength, and the thermal cutter of the laminating machine produced can greatly improve the film cutting efficiency and improve the equipment stability.

[0005] The technical solution of the present invention is a high resistivity titanium alloy material for a hot cutter of a laminating machine, comprising the following components in mass percentage: Sn 10.0-16.0%, Cr 3.0-10.0%, and the remainder being Ti and inevitable impurities.

[0006] The high resistivity titanium alloy material for the hot cutter of the laminating machine comprises the following components in percentage by mass: Sn 10.0-13.0%, Cr 7.0-10.0%, and the remainder being Ti and inevitable impurities.

[0007] The aforementioned high resistivity titanium alloy material for the hot cutter of the laminating machine includes the following components in percentage by mass: Sn 10.0%, Cr 10.0%, and the balance Ti and inevitable impurities.

[0008] The manufacturing method of the aforementioned high resistivity titanium alloy material for the thermal cutting knife of the laminating machine comprises the following steps:

[0009] S1. According to the component system and mass ratio of the titanium alloy material, a plate with a thickness of 0.5 mm to 4.0 mm is prepared by smelting, forging or rolling;

[0010] S2. Perform multiple annealing heat treatments on the plate to adjust the structure and improve the resistivity and tensile properties;

[0011] S3, cutting the sheet to obtain the required size.

[0012] In the aforementioned method for manufacturing the high resistivity titanium alloy material for the hot cutting knife of the laminating machine, in step 2, the plate is subjected to a triple annealing heat treatment.

[0013] In the aforementioned method for manufacturing high resistivity titanium alloy material for hot cutting knife of laminating machine, in step S2, the temperature of the first heat treatment of the plate is 900°C-960°C, kept at this temperature for 4 hours, and then air-cooled.

[0014] In the aforementioned method for manufacturing high resistivity titanium alloy material for hot cutting knife of laminating machine, in step S2, the temperature of the second heat treatment of the plate is 940°C-960°C, kept at that temperature for 1 hour, and then air-cooled.

[0015] In the aforementioned method for manufacturing high resistivity titanium alloy material for hot cutting knife of laminating machine, in step S2, the temperature of the third annealing heat treatment of the plate is 540°C-600°C, kept at this temperature for 1 hour, and then air-cooled.

[0016] Compared with the prior art, the present invention utilizes the high resistivity of titanium materials, and at the same time, adds a certain amount of Sn and Cr during the manufacturing process of the titanium alloy material. Through alloying and the coupling effect of alloy elements, and further combined with multiple annealing heat treatments, the resistivity of the alloy is greatly improved, and the strength of the titanium alloy material is greatly improved. The high resistivity titanium alloy material prepared by the present invention can adapt to working environments with large current intensity and many work repetitions. The produced hot cutter of the laminating machine can greatly improve the film cutting efficiency and improve the stability of the equipment. In addition, the alloy also has good technical applications and market prospects in other fields such as printing and packaging engineering. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the embodiments, but they are not intended to limit the present invention.

[0018] Embodiment 1: A high resistivity titanium alloy material for a thermal cutter of a laminating machine, the titanium alloy comprising the following components in mass percentage: Sn 10.0%, Cr 10.0%, the remainder being Ti and unavoidable impurities. The manufacturing method thereof is as follows:

[0019] 0.5mm titanium alloy plates were prepared by smelting, forging and rolling methods, and triple annealing heat treatment was carried out. The main process of heat treatment was: the temperature of the first heat treatment was 900℃, keeping warm for 4h, and air cooling; the temperature of the second heat treatment was 960℃, keeping warm for 1h, and air cooling; the temperature of the third heat treatment was 540℃, keeping warm for 1h, and air cooling.

[0020] Cut the sheet material to the required size.

[0021] Embodiment 2: A high resistivity titanium alloy material for a thermal cutter of a laminating machine, the titanium alloy comprising the following components in mass percentage: Sn 11.0%, Cr 9.0%, the remainder being Ti and unavoidable impurities. The manufacturing method thereof is as follows:

[0022] A 1.5 mm titanium alloy plate was prepared by smelting, forging and rolling methods, and subjected to triple annealing heat treatment. The main process of the heat treatment was: the temperature of the first heat treatment was 910°C, kept warm for 4 hours, and air-cooled; the temperature of the second heat treatment was 955°C, kept warm for 1 hour, and air-cooled; the temperature of the third heat treatment was 550°C, kept warm for 1 hour, and air-cooled.

[0023] Finally, the board is cut to the required size.

[0024] Embodiment 3: A high resistivity titanium alloy material for a thermal cutter of a laminating machine, the titanium alloy comprising the following components in mass percentage: Sn 12.0%, Cr 7.0%, the remainder being Ti and unavoidable impurities. The manufacturing method thereof is as follows:

[0025] A 2mm titanium alloy plate was prepared by melting, forging and rolling methods, and subjected to triple annealing heat treatment. The main process of the heat treatment was: the temperature of the first heat treatment was 920℃, kept warm for 4h, and air-cooled; the temperature of the second heat treatment was 950℃, kept warm for 1h, and air-cooled; the temperature of the third heat treatment was 560℃, kept warm for 1h, and air-cooled.

[0026] Finally, the board is cut to the required size.

[0027] Embodiment 4: A high resistivity titanium alloy material for a hot cutter of a laminating machine, the titanium alloy comprising the following components in mass percentage: Sn 14.0%, Cr 5.0%, the remainder being Ti and unavoidable impurities. The manufacturing method thereof is as follows:

[0028] A 3mm titanium alloy plate was prepared by melting, forging and rolling methods, and subjected to triple annealing heat treatment. The main process of the heat treatment was: the temperature of the first heat treatment was 940℃, kept warm for 4 hours, and air-cooled; the temperature of the second heat treatment was 945℃, kept warm for 1 hour, and air-cooled; the temperature of the third heat treatment was 570℃, kept warm for 1 hour, and air-cooled.

[0029] Finally, the board is cut to the required size.

[0030] Embodiment 5: A high resistivity titanium alloy material for a thermal cutter of a laminating machine, the titanium alloy comprising the following components in mass percentage: Sn 16.0%, Cr 3.0%, the remainder being Ti and unavoidable impurities. The manufacturing method thereof is as follows:

[0031] A 4mm titanium alloy plate was prepared by smelting, forging and rolling methods, and subjected to triple annealing heat treatment. The main process of the heat treatment was: the temperature of the first heat treatment was 960℃, kept warm for 4h, and air-cooled; the temperature of the second heat treatment was 940℃, kept warm for 1h, and air-cooled; the temperature of the third heat treatment was 590℃, kept warm for 1h, and air-cooled.

[0032] Finally, the board is cut to the required size.

[0033] Comparative examples: TC4 material, Ti-16Sn material and Ti-10Cr.

[0034] The performance tests were conducted on the titanium alloy materials manufactured in Examples 1 to 5 and the materials of the comparative example. The results are shown in Table 1:

[0035]

[0036]

[0037] Table 1

[0038] It can be seen from Table 1 that the high resistivity titanium alloy in the present invention has a resistivity higher than 2.5×10 -6 Ω·m, taking into account both high strength and good plasticity. Compared with the comparative material TC4 alloy, the resistivity of the material in the present invention is about 50% higher, and the strength is equivalent, which is very suitable for hot cutting knife applications. Compared with the comparative materials Ti-Sn and Ti-Cr binary alloys, the ternary alloy in the present invention also has obvious advantages in resistivity, plasticity, etc.

[0039] The titanium alloy proposed in the present invention adopts a multi-element strengthening design concept, which can greatly improve the resistivity of the material while ensuring the strength and plasticity of the material, meeting the comprehensive requirements of the hot cutter for high resistivity and high performance of the material. At the same time, it has good machinability and is particularly suitable for rolling out 0.5-4mm titanium alloy sheets to meet the size requirements of the hot cutter. At the same time, the titanium alloy proposed in the present invention does not contain precious elements, and compared with 304 stainless steel, the overall cost increase is not obvious.

[0040] The titanium alloy material of the present invention contains 10-16wt% Sn element. Sn metal has high resistivity. Adding Sn to titanium can effectively improve the resistivity of the alloy. When the Sn content is higher than 6%, intermetallic compounds can be formed. There are a large number of interfaces between the intermetallic compounds and the solid solution, which further improves the resistivity of the alloy. In addition, as a neutral element of titanium, Sn can appropriately improve the strength without significantly reducing the plastic toughness.

[0041] In the present invention, the Cr element can stabilize the β phase in the titanium alloy to form a dual-phase titanium alloy. The α-β phase boundary of the dual-phase titanium alloy has a certain barrier effect on the current, which can further improve the resistivity. At the same time, the Cr element can improve the strength and plasticity of the titanium alloy to a certain extent.

[0042] In the present invention, the applicant innovatively proposed and verified the synergistic effect of Sn and Cr. The simultaneous addition of the neutral element Sn and the β-stabilizing element Cr can exert an extraordinary coupling effect. The resistivity of the Ti-Sn-Cr ternary alloy is much higher than that of the Ti-Sn and Ti-Cr binary alloys with the same element addition amount.

[0043] Furthermore, the present invention performs triple annealing heat treatment on the prepared sheet, which can promote the dispersion and precipitation of intermetallic compounds such as Ti3Sn and Ti2Cr in the matrix, and at the same time fully decompose the β phase, increase the phase interface ratio, and increase the resistivity. At the same time, there is an obvious coupling effect between Ti3Sn and Ti2Cr, which makes the comprehensive performance of the ternary alloy much higher than that of the binary alloy.

[0044] In summary, the titanium alloy material of the present invention has high resistivity and high strength, and the thermal cutter of the laminating machine produced can greatly improve the film cutting efficiency and improve the stability of the equipment. In addition, the alloy also has good technical application and market prospects in other fields such as printing and packaging engineering.

Claims

1. A high resistivity titanium alloy material for hot cutting knives of laminating machines, characterized in that: In terms of mass percentage, the components are: Sn 10.0-13.0%, Cr7.0-10.0%, and the balance is Ti and unavoidable impurities; The method for manufacturing the high resistivity titanium alloy material for the hot cutting knife of the laminating machine comprises the following steps: S1. According to the component system and mass ratio of the titanium alloy material, a plate with a thickness of 0.5 mm to 4.0 mm is prepared by smelting, forging or rolling; S2. Perform multiple annealing heat treatments on the plate to adjust the structure and improve the resistivity and tensile properties; S3, cutting the sheet to obtain the required size; In step S2, the plate is subjected to a triple annealing heat treatment; the temperature of the first heat treatment of the plate is 900°C-920°C, kept warm for 4 hours, and then air-cooled; the temperature of the second heat treatment of the plate is 940°C-960°C, kept warm for 1 hour, and then air-cooled; the temperature of the third annealing heat treatment of the plate is 540°C-600°C, kept warm for 1 hour, and then air-cooled.

2. The high resistivity titanium alloy material for hot cutting blade of laminating machine according to claim 1, characterized in that: In terms of mass percentage, the components are: Sn 10.0%, Cr 10.0%, and the balance is Ti and inevitable impurities.

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