摘要:
A frame member for use in a two-wheeled vehicle and an all-terrain vehicle that includes a plurality of Al members each made of a 7000 series Al alloy having a high strength is provided in which weld crack sensitivity is reduced and a weld joint having an excellent strength is provided. The alloy composition of the 7000 series Al alloy, which provides the Al member, containing Cu: 0.01 to 0.50%, Mg: 0.5 to 2.1%, and Zn: 4.0 to 8.5%, with the balance being Al and inevitable impurities. Further, in the production of the frame member, the plurality of Al members are integrated by welding using a filler metal containing Mg: 5.5 to 8.0%, Cr: 0.05 to 0.25%, Ti: 0.25% or less, Si: 0.4% or less, Fe: 0.4% or less, Cu: 0.1% or less, Zr: 0.05% or less and Zn: 0.25% or less, and with the balance being Al and inevitable impurities.
摘要:
A frame member for use in a two-wheeled vehicle and an all-terrain vehicle that includes a plurality of Al members each made of a 7000 series Al alloy having a high strength is provided in which weld crack sensitivity is reduced and a weld joint having an excellent strength is provided. The alloy composition of the 7000 series Al alloy, which provides the Al member, contains Cu: 0.01 to 0.50%, Mg: 0.5 to 2.1%, and Zn: 4.0 to 8.5%, the balance consisting of Al and inevitable impurities. Further, in the production of the frame member, the plurality of Al members is integrated by welding using a filler metal containing Mg: 5.5 to 8.0%, Cr: 0.05 to 0.25%, Ti: 0.25% or less, Si: 0.4% or less, Fe: 0.4% or less, Cu: 0.1% or less, Zr: 0.05% or less and Zn: 0.25% or less, and the balance consisting of Al and inevitable impurities.
摘要:
A sheet of a 6000 type aluminum alloy containing Si and Mg as main alloy components and having an excellent formability sufficient to allow flat hemming, excellent resistance to denting, and good hardenability during baking a coating, which exhibits an anisotropy of Lankford values of more than 0.4 or the strength ratio for cube orientations of the texture thereof of 20 or more, and exhibits a minimum bend radius of 0.5 mm or less at 180° bending, even when the offset yield strength thereof exceeds 140 MPa through natural aging; and a method for producing the sheet of the aluminum alloy, which includes the steps of subjecting an ingot to a homogenization treatment, cooling to a temperature lower than 350° C. at a cooling rate of 100° C./hr or more, optionally to room temperature, heating again to a temperature of 300 to 500° C. and subjecting it to hot rolling, cold rolling the hot rolled product, and subjecting the cold rolled sheet to a solution treatment at a temperature of 400° C. or higher, followed by quenching.
摘要:
An Al—Mg—Si—Cu aluminum alloy plate excelling in strength and formability and exhibiting improved filiform corrosion resistance which is suitably used for automotive body panels. The aluminum alloy plate contains 0.25-0.6% of Mg (mass %, hereinafter the same), 0.9-1.1% of Si, 0.6-1.0% of Cu, and at least one of 0.20% or less of Mn and 0.10% or less of Cr, with the balance consisting of Al and impurities, wherein the number of Q phases (Cu—Mg—Si—Al phases) with a size of 2 &mgr;m or more in diameter present in a matrix is 150 per mm2 or more. The aluminum alloy plate is fabricated by homogenizing an ingot of an aluminum alloy having the above composition at 530° C. or more, cooling the ingot to 450° C. or less at a cooling rate of 30° C./hour or less, hot-rolling the ingot, cold-rolling the hot-rolled product, and providing the cold-rolled product with a solution heat treatment.
摘要翻译:Al-Mg-Si-Cu铝合金板具有优异的强度和成形性,并且表现出改善的丝状耐腐蚀性,适用于汽车车身面板。 铝合金板含有0.25-0.6%的Mg(质量%,以下相同),0.9-1.1%的Si,0.6-1.0%的Cu和0.20%以下的Mn和0.10%以下的至少一种 的Cr,余量由Al和杂质构成,其中存在于基体中的直径为2μm以上的Q相(Cu-Mg-Si-Al相)的数量为150个/ mm 2以上。 铝合金板通过在530℃以上均匀化具有上述成分的铝合金锭制成,以30℃/小时以下的冷却速度将锭冷却至450℃以下, 对锭进行热轧,冷轧热轧制品,并对冷轧制品进行固溶热处理。
摘要:
A sheet of a 6000 type aluminum alloy containing Si and Mg as main alloy components and having an excellent formability sufficient to allow flat hemming, excellent resistance to denting, and good hardenability during baking a coating, which exhibits an anisotropy of Lankford values of more than 0.4 or the strength ratio for cube orientations of the texture thereof of 20 or more, and exhibits a minimum bend radius of 0.5 mm or less at 180° bending, even when the offset yield strength thereof exceeds 140 MPa through natural aging; and a method for producing the sheet of the aluminum alloy, which includes the steps of subjecting an ingot to a homogenization treatment, cooling to a temperature lower than 350° C. at a cooling rate of 100° C./hr or more, optionally to room temperature, heating again to a temperature of 300 to 500° C. and subjecting it to hot rolling, cold rolling the hot rolled product, and subjecting the cold rolled sheet to a solution treatment at a temperature of 400° C. or higher, followed by quenching.
摘要:
An aluminum alloy material exhibiting excellent bendability can be produced without performing a straightening step, and can be bent without developing orange peel. The aluminum alloy material is a T4-tempered material formed of an Al—Cu—Mg—Si alloy including 1.0 to 2.5 mass % of Cu, 0.5 to 1.5 mass % of Mg, and 0.5 to 1.5 mass % of Si, with the balance being aluminum and unavoidable impurities, a matrix that forms an inner part of the aluminum alloy material having a microstructure formed by recrystallized grains having an average crystal grain size of 200 μm or less, and the aluminum alloy material having a ratio of tensile strength/yield strength determined by a tensile test of 1.5 or more.
摘要:
A high-strength Al—Cu—Mg—Si aluminum alloy product obtained by extrusion is characterized in that the microstructure of the entire surface of the cross-section of the aluminum alloy product is formed of recrystallized grains, the grains have an average aspect ratio (L/t) of 5.0 or less and the orientation density of the grains in the microstructure, for which the normal direction to the {001} plane is parallel to the extrusion direction in comparison with the grains orientated to random orientations, is 50 or less. The high-strength Al—Cu—Mg—Si aluminum alloy product is characterized in that rod-shaped precipitates are arranged in the grains of the matrix in the direction, the precipitates have an average length of 10 to 70 nm and a maximum length of 120 nm or less, and the number density of the precipitates in the [001] direction measured from the (001) plane is 500 or more per square micrometer.
摘要:
A method of joining aluminum alloy members, including the steps of: obtaining a joined body including: (a) contacting aluminum alloy members each made of a 6000 series aluminum alloy with T4 temper; and (b) performing a friction stir welding operation on a contact portion of the aluminum alloy members at which they are held in contact with each other, so as to form a stir zone at the contact portion; and performing, on the obtained joined body, an underaging treatment which is an artificial aging treatment and which is completed before hardness of the stir zone reaches maximum hardness, the underaging treatment being performed before GP zones are formed at the stir zone of the joined body.
摘要:
A heat-treated high-strength Al—Cu—Mg—Si aluminum alloy product exhibits excellent extrudability and high strength. The high-strength Al—Cu—Mg—Si aluminum alloy product obtained by extrusion is characterized in that the microstructure of the entire surface of the cross section of the aluminum alloy product is formed of recrystallized grains, the grains have an average aspect ratio (L/t) of 5.0 or less (wherein L is the average size of the grains in the extrusion direction, and t is the average thickness of the grains), and the orientation density of the grains in the microstructure, for which the normal direction to the {001} plane is parallel to the extrusion direction in comparison with the grains orientated to random orientations, is 50 or less. The high-strength Al—Cu—Mg—Si aluminum alloy product obtained by extrusion and cold working is characterized in that rod-shaped precipitates are arranged in the grains of the matrix in the direction, the precipitates have an average length of 10 to 70 nm and a maximum length of 120 nm or less, and the number density of the precipitates in the [001] direction measured from the (001) plane is 500 or more per square micrometer.
摘要翻译:经热处理的高强度Al-Cu-Mg-Si铝合金产品具有优异的挤出性和高强度。 通过挤出获得的高强度Al-Cu-Mg-Si铝合金产品的特征在于,铝合金产品的横截面的整个表面的微观结构由再结晶晶粒形成,颗粒具有平均纵横比( L / t)为5.0以下(其中L是挤出方向上的晶粒的平均尺寸,t是晶粒的平均厚度),并且微观结构中的晶粒的取向密度为法线方向 与定向为随机取向的晶粒相比,{001}平面与挤出方向平行,为50以下。 通过挤出和冷加工获得的高强度Al-Cu-Mg-Si铝合金产品的特征在于,在<100>方向上在基体颗粒中排列棒状沉淀物,沉淀物的平均长度 10〜70nm,最大长度为120nm以下,从(001)面测定的[001]方向的析出物的数密度为每平方微米500以上。
摘要:
A sheet of a 6000 type aluminum alloy containing Si and Mg as main alloy components and having an excellent formability sufficient to allow flat hemming, excellent resistance to denting, and good hardenability during baking a coating, which exhibits an anisotropy of Lankford values of more than 0.4 or the strength ratio for cube orientations of the texture thereof of 20 or more, and exhibits a minimum bend radius of 0.5 mm or less at 180° bending, even when the offset yield strength thereof exceeds 140 MPa through natural aging; and a method for producing the sheet of the aluminum alloy, which includes the steps of subjecting an ingot to a homogenization treatment, cooling to a temperature lower than 350° C. at a cooling rate of 100° C./hr or more, optionally to room temperature, heating again to a temperature of 300 to 500° C. and subjecting it to hot rolling, cold rolling the hot rolled product, and subjecting the cold rolled sheet to a solution treatment at a temperature of 400° C. or higher, followed by quenching.