57results about How to "Reduced Quench Sensitivity" patented technology

The invention discloses Al-Mg-Si-Cu alloy and a preparation method thereof. The alloy consists of the following components in percentage by mass: 0.4 to 0.6 percent of Mg, 0.45 to 0.6 percent of Si, 0.3 to 0.8 percent of Cu, 0.1 to 0.2 percent of Mn, 0.1 to 0.7 percent of Zn, 0 to 0.1 percent of Cr, 0.01 to 0.02 percent of Ti, not more than 0.3 percent of Fe, not more than 0.1 percent of other impurities (total content), and the balance of Al. The alloy has the characteristics of the reduction of deformation resistance, improves extrusion speed and production efficiency, and can improve the yield under the condition of constant productivity. In addition, the alloy does not need an extra water quenching process, and can reduce investment cost of equipment by on-line air quenching after hot extrusion.

The invention discloses an aluminium alloy section bar for structural engineering, and a preparation method thereof. The aluminium alloy section bar comprises the following compositions by weight percent: 0.50-0.60% of magnesium, 0.65-0.75% of silicon, 0-0.25% of manganese, 0-0.10% of chromium, 0.005-0.009% of titanium, 0-0.30% of iron, 0-0.10% of zinc, 0-0.10% of copper, and the balance aluminium. Compared with 6063 alloy and 6063A alloy, the aluminium alloy section bar of the invention has tensile strength of 290 MPa or more, yield strength of 240 MPa or more, and elongation at break of 8% or more. 6061 alloy is high in quench sensitivity, and quenching and water cooling must be employed for guarantee of obtaining demanded mechanical properties during production, and therefore the extruded aluminium section bar is serious in deformation; compared with 6061 alloy, the alloy material of the invention is smaller in quench sensitivity, and by using strong wind cooling or mist cooling, the demanded properties are obtained when the section bar is processed; and the aluminium alloy section bar of the invention is good in toughness, and has a pendulum impact value of 20 J/cm<2> or more.

The invention belongs to the technical field of aluminum alloy production, and relates to a machining method for 7-series aluminum alloy thick plates. Aluminum alloy ingots comprise the following components in percentage by mass: Si not more than 0.20%, Fe not more than 0.25%, 1.2-2.1% of Cu, 1.2-2.2% of Mg, 5.0-7.0% of Zn, 0.02-0.15% of Ti, 0.02-0.15% of Zr, Ti+Zr not more than 0.15%, single impurity not more than 0.05%, total impurity not more than 0.15%, and the balance of Al. The machining method for the aluminum alloy thick plates adopts a mode of multi-pass hot rolling, and adopts double-stage solid solution and double-stage aging to enable the finally prepared 7-series aluminum alloy thick plates to achieve excellent strength and rupture toughness.

The invention discloses a 600 MPa level low-quenching-sensitivity ultrahigh strength aluminum alloy and a preparing method thereof. The content and weight percent of Zn, Mg, Cu, Zr, Mn, Cr and Ti in the aluminum alloy are adjusted, and the three-level homogenizing treatment technology and the peak value aging or double-level aging treatment technology is adopted in the preparing technology. By adoption of the novel aluminum alloy prepared through the method, the comprehensive performance of the novel aluminum alloy is superior to AA7085.

The invention discloses Al-Mg-Zn aluminum alloy. The Al-Mg-Zn aluminum alloy comprises 6.0-10.0% of Mg, 3.0-5.0% of Zn, 2.0% of Cu and lt, 0.5% of Mn and lt, 0.3% of Fe and lt, 0.3% of Si and lt, less than or equal to 0.5% of each of Zn, S and c or less than or equal to 0.8% of the compound of the Zn, S and c, less than or equal to 0.05% of each of the other impurity elements, and rest of Al, wherein the total weight of the impurities is less than or equal to 0.2%, and the weight ratio of Zn to Mg is 0.48-0.62. The Al-Mg-Zn alloy has high intensity, good plasticity, low density and low quenching sensitivity. The intensity of the material (component) prepared by the alloy is larger than or equal to 500 Mpa under T6, the room temperature elongation percentage of the material is larger than or equal to 10%, and the density is lower than or equal to 2.7 g/cm3.

Ultrahigh-strength high-hardenability Al, Zn, Mg and Cu alloy belongs to the technical field of metal alloy. The ultrahigh-strength high-hardenability Al, Zn, Mg and Cu alloy comprises 10.0% of Al, 1.6% of Zn, 1.4% of Mg, 0.12% of Cu and Zr. Hardening depth of the alloy is increased by 32%, while hardening degree is lowered by 3.3%. Improvement action of alloy microelements on hardenability is not obvious. Therefore, quenching sensitivity of the alloy is lowered by increasing Zn-to-Mg ratio and controlling copper content, while cost is not evidently increased.

The invention discloses CuZnNiSi alloy, a preparation method thereof and a method for preparing strips using the same. The method comprises the following steps: weighting 10-20% of zinc, 0.462-1.89% of nickel, wherein silicon accounts for 0.11-0.42% of the total amount of copper silicon alloy and the balance is copper; placing copper and nickel into an intermediate frequency induction melting furnace, heating to 1250-1300 DEG C and melting; after melting, adding zinc, copper silicon alloy, uniformly stirring up and casting; obtaining CuZnNiSi alloy using homogenization processing. The CuZnNiSi alloy strips can be obtained by hot rolling, quenching, rolling, annealing and tension-leveling. The CuZnNiSi alloy is high in strength and conductivity.

The invention relates to aluminum alloy and provides high-strength aluminum alloy with the tensile strength of more than 700MPa and a preparation method thereof. The high-strength aluminum alloy comprises the following raw materials in percentage by weight: 0.10%-0.14% of Fe, 0.03%-0.04% of Mn, 0.02%-0.04% of Si, 0.01%-0.06% of Ti, 0.03%-0.09% of B, 2.2%-2.9% of Zn, 0.9%-1.0% of Mg, 1.1%-1.3% of Cu, 0.5%-1.0% of Ce, 0.1%-0.4% of Sc and the balance of Al.

The invention relates to a hot isostatic pressing treatment process method for a casting forming ZL101A aluminum alloy, belongs to the technical field of aluminum alloy casting and heat treatment, andsolves the problems that defects exist in a casting forming ZL101A aluminum alloy material, the fatigue performance of the material is affected, the heat treatment is carried out separately after hotisostatic pressing, many production processes are needed, and the period is long in the prior art. The hot isostatic pressing treatment process method for the casting forming ZL101A aluminum alloy comprises the following steps of step 1, casting ZL101A aluminum alloy castings; and step 2, carrying out hot isostatic pressing treatment on the ZL101A aluminum alloy castings in hot isostatic pressingequipment, wherein the step of carrying out hot isostatic pressing treatment comprises the steps of sequentially carrying out heating and boosting, high-temperature-segment heat preservation and pressure maintaining, pressure maintaining and quick cooling, low-temperature-segment heat preservation and pressure maintaining and cooling and depressurization. According to the method, the improvementof the strength and the anti-fatigue mechanical property of the ZL101A aluminum alloy material is realized, the production cycle of the conventional hot isostatic pressing treatment casting aluminum alloy is shortened, and the production cost is saved.

The invention is suitable for the field of material processing, and provides an aluminum alloy and a preparation method thereof. The aluminum alloy comprises the following components in percentage bymass: 0.62-0.78% of silicon, 0.56-0.70% of magnesium, 0.15-0.20% of copper, 0.25-0.38% of manganese, 0.10-0.18% of chromium, 0.03-0.08% of vanadium, iron not more than 0.20% and more than 0, titaniumnot more than 0.03% and more than 0, and the balance of aluminum. In the aluminum alloy, through limiting of the contents of silicon, magnesium and copper fed elements, the product strength is improved when the extrusion performance of the aluminum alloy is not reduced; and meanwhile, through feeding of such elements as manganese, chromium and vanadium and cooperation with subsequent process treatment, dispersion separation mass points can be generated to achieve an effect of inhibiting recrystallization in the extrusion process, that is, the product strength and ductility are further improved, and prepared products achieve higher strength, ductility, stress corrosion resistance and extrusion performance.

The invention discloses an aluminum alloy building formwork mainly comprising, by mass, 0.4%-1.0% of Si, 0.8%-1.3% of Mg, 0.05%-0.2% of Cu, 0.001%-0.15% of Mn, 0.2%-0.7% of Fe, less than or equal to 0.25% of Zn, 0.001%-0.1% of Cr, 0.03%-0.15% of Ti and the balance Al and inevitable impurities. The content of the inevitable impurities is less than or equal to 0.15%. Correspondingly, the invention further discloses a preparation method of the aluminum alloy building formwork. The aluminum alloy building formwork is excellent in mechanical property, the extrusion speed can reach 8-10 m/min, and the production efficiency is high.

The invention discloses a preparation method of a high-strength and corrosion-resistant Al-Y-Sc alloy and the Al-Y-Sc alloy. The preparation method includes the following steps that S1, an alloy castingot is prepared, specifically, intermediate alloys are prepared from Cu, Sc, Zr, Y, Fe, Cr, Ti Mn and Al, Mg is divided into two parts, the intermediate alloys Al-Cu, Al-Sc, Al-Zr, Al-Y, Al-Fe, Al-Cr, Al-Ti and Al-Mn, pure Zn and high-purity Al are smelted, and then a first part of Mg, an Al-Ti-B grain refiner, hexachloroethane and a second part of Mg are sequentially added; casting is performedto obtain the alloy cast ingot; and S2, the alloy cast ingot is sequentially subjected to homogenization treatment, solid solution treatment, quenching, pre-aging, regression and re-aging treatment,and the high-strength and corrosion-resistant aluminum alloy is obtained. The prepared aluminum alloy is high in strength, good in toughness, excellent in heat stability and fatigue resistance and long in service life.

The invention discloses Al-Zn-Mg-Cu-Mn aluminum alloy and a preparation process thereof. The Al-Zn-Mg-Cu-Mn aluminum alloy is prepared from the following components according to weight percent: 5.5 wt% to 6.6 wt% of Zn, 0.35 wt% to 0.55 wt% of Mg, 0.15 wt% to 0.25 wt% of Cu, 0.1 wt% to 0.19 wt% of Mn, 0.1 wt% to 0.2 wt% of Zr, 0.05 wt% to 0.2 wt% of Cr, less than 0.05 wt% of Ti, less than 0.15 wt%of Si, less than 0.25 wt% of Fe and the balance of Al. The preparation process of the Al-Zn-Mg-Cu-Mn aluminum alloy comprises the steps of melting the components of the Al-Zn-Mg-Cu-Mn aluminum alloyand casting into an aluminum alloy casting first, then uniformly heating the aluminum alloy casting so as to form an aluminum alloy rod, cutting the aluminum alloy rod into aluminum alloy casting rods, heating again so as to soften the aluminum alloy casting rods, extruding the softened aluminum alloy casting rods so as to form aluminum alloy extruded bodies, and finally, performing online coolingstraightening and cutting and standing treatment on the aluminum alloy extruded bodies in sequence, so that the Al-Zn-Mg-Cu-Mn aluminum alloy is obtained.