随着社会对环境保护和能源科学合理利用的高度重视,汽车制造业寻求强度高、成形性好且密度低的材料来替代传统汽车材料以降低汽车自重来满足社会发展对节能减排的要求。目前已有的铝合金、镁合金、钛合金等新型成型材料的发展还未成熟,...随着社会对环境保护和能源科学合理利用的高度重视,汽车制造业寻求强度高、成形性好且密度低的材料来替代传统汽车材料以降低汽车自重来满足社会发展对节能减排的要求。目前已有的铝合金、镁合金、钛合金等新型成型材料的发展还未成熟,只局部应用在汽车制造中,大部分汽车材料仍然以钢材为主,因此研发高强延积、轻量化的汽车钢板成为冶金行业的一项重要课题。在保证汽车碰撞符合相关安全标准的前提下,冶金行业已经将高强度、轻量化的汽车钢板发展到以淬火-配分(Quenching and partitioning,Q&P)工艺为代表的第三代,但是第一、二代汽车钢板同样大规模应用于汽车制造业中未完全淘汰。主要介绍轻量化、高强度汽车钢板的应用现状及研发进展。展开更多
The Al2Ca intermetallic compound was prepared by melting process in a vacuum induction furnace. And the A12Ca compound was added in as-cast AZ31 alloys for grain refinement. The effect of its additional levels on grai...The Al2Ca intermetallic compound was prepared by melting process in a vacuum induction furnace. And the A12Ca compound was added in as-cast AZ31 alloys for grain refinement. The effect of its additional levels on grain refinement of as-cast AZ31 alloy was investigated and the mechanism of the grain refinement was discussed. The results reveal that the addition of 1.1% Al2Ca （mass fraction） decreases the average grain size of as-cast AZ31 alloy from 354 to 198 μm. And the thermal stability of the grains refined by Al2Ca is superior. The grain refining mechanism is attributed to the combined effects of solute and heterogeneous nucleation from the Al2Ca.展开更多
文摘随着社会对环境保护和能源科学合理利用的高度重视,汽车制造业寻求强度高、成形性好且密度低的材料来替代传统汽车材料以降低汽车自重来满足社会发展对节能减排的要求。目前已有的铝合金、镁合金、钛合金等新型成型材料的发展还未成熟,只局部应用在汽车制造中,大部分汽车材料仍然以钢材为主,因此研发高强延积、轻量化的汽车钢板成为冶金行业的一项重要课题。在保证汽车碰撞符合相关安全标准的前提下,冶金行业已经将高强度、轻量化的汽车钢板发展到以淬火-配分(Quenching and partitioning,Q&P)工艺为代表的第三代,但是第一、二代汽车钢板同样大规模应用于汽车制造业中未完全淘汰。主要介绍轻量化、高强度汽车钢板的应用现状及研发进展。
基金Projects(CSTC2013jcyj C60001,CSTC2013jcyj A50020,CSTC2014jcyjjq0041)supported by the Chongqing Science and Technology Commission,ChinaProjects(51531002,51171212,51474043)supported by the National Natural Science Foundation of China+1 种基金Projects(2013DFA71070,2013CB632200)supported by the National Science and Technology Program of ChinaProject(KJZH14101)supported by the Education Commission of Chongqing Municipality,China
文摘The Al2Ca intermetallic compound was prepared by melting process in a vacuum induction furnace. And the A12Ca compound was added in as-cast AZ31 alloys for grain refinement. The effect of its additional levels on grain refinement of as-cast AZ31 alloy was investigated and the mechanism of the grain refinement was discussed. The results reveal that the addition of 1.1% Al2Ca （mass fraction） decreases the average grain size of as-cast AZ31 alloy from 354 to 198 μm. And the thermal stability of the grains refined by Al2Ca is superior. The grain refining mechanism is attributed to the combined effects of solute and heterogeneous nucleation from the Al2Ca.
