The invention provides a preparation method of free cutting high strength multi-phase non-quenched and tempered steel. After the exit of the heating furnace, the ultra-fast cooling equipment is added, and then the reheating furnace is re-heated for conventional hot rolling. By pre-heat treatment in advance, the billet can produce a great core surface temperature difference under ultra-fast cooling, and the original coarse austenite can be transformed into fine martensite structure. The original Austrian grain refines, and the size of the original Austrian grain decreases after reheating due to the genetic characteristics of the structure. The final structure of the hot rolling process is obviously finer than that of the conventional process. The structure of bainite-martensite dual phase non-quenched and tempered steel was obtained by entering the ultra-fast cooling equipment and cooling to the bainite transformation temperature for thermal insulation, then entering the ultra-fast cooling equipment and cooling to room temperature. It achieves the performance level of modulation treatment, but omits the later heat treatment process, saves energy and production costs, and improves production efficiency.
【技术实现步骤摘要】
一种易切削高强度复相非调质钢制备方法
本专利技术属于冶金领域,涉及一种高强度复相非调质钢制备的工艺方法。
技术介绍
随着机械制造及汽车领域的飞速发展,环境保护越来越受到人们的重视。不仅在重视发展的基础上,更要合理的进行技术革新,采用新的材料来代替原有传统材料用于制造汽车等是一个行之有效的方式。通过资料显示,在汽车的行驶能耗占80%,材料生产能耗占15%,汽车制造能耗占5%。通过使用非调制钢材来替代传统调质钢可以很大程度降低生产能耗40%以上,同时还能降低制造成本20%以上,并且在保证材料所需要的综合力学性能及使用寿命。并可以有效的减少因调质处理不当引起的变形开裂等问题。目前国内所使用的转向节是由球铁材质制造,通过使用非调质钢进行等效替代,重量可以从5kg降低到3.5kg;传统前轴用42CrMo调质处理后制造,采用非调质钢等效代替,可以从9.5kg降低到8.5kg;通过使用非调质钢代替传统钢材,可以极大的实现汽车的轻量化,汽车每减重10%就可以降低7%的油耗,并提升了汽车的操控性,对易损件的消耗上也起到一定的保护作用,增强其使用寿命,缩短刹车距离,提高车身的主动安全 ...
【技术保护点】
1.一种易切削高强度复相非调质钢制备方法,其特征在于,该复相组织非调质钢成分按重量百分比:C:0.18~0.22%,Mn:1.80~2.20%,Si:0.35~0.40%,Cr:0.50~0.55%,Ni:0.05~0.08%,V:0.10~0.13%,Nb:0.05~0.08%,Ti:0.013~0.015%,Ce:0.005~0.015%,余量为Fe和不可避免的杂质;其制备方法包括如下步骤:第一步,预热处理:将铸态坯料放置于加热炉中加热到1200~1300℃,保温60~120min,通过水冷设备超快速水冷至马氏体相变点Ms;第二步,热轧处理:将预热处理后的坯料再送至加热 ...
【技术特征摘要】
1.一种易切削高强度复相非调质钢制备方法,其特征在于,该复相组织非调质钢成分按重量百分比:C:0.18~0.22%,Mn:1.80~2.20%,Si:0.35~0.40%,Cr:0.50~0.55%,Ni:0.05~0.08%,V:0.10~0.13%,Nb:0.05~0.08%,Ti:0.013~0.015%,Ce:0.005~0.015%,余量为Fe和不可避免的杂质;其制备方法包括如下步骤:第一步,预热处理:将铸态坯料放置于加热炉中加热到1200~1300℃,保温60~120min,通过水冷设备超快速水冷至马氏体相变点Ms;第二步,热轧处理:将预热处理后的坯料再送至加热炉中进行二次加热至1100~1150℃,保温20~30min,将坯料从加...
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