QP980钢低温韧脆性能的研究  

Research on low temperature toughness and brittleness of QP980

作　　者：周冶东[1] 周澍[1] 丁晨[1] 张建伟[1] 李和田[1] 方健[1] 

机构地区：[1]宝钢集团中央研究院,上海201900

出　　处：《塑性工程学报》2015年第3期103-106,共4页Journal of Plasticity Engineering

摘　　要：通过仪器化冲击试验方法评价了第三代汽车用高强钢QP980不同温度下的冲击韧性,并获得了其韧脆转变温度。使用预应变模拟冲压成形过程,评价了塑性变形对其低温韧脆特性的影响。结果表明,塑性变形会降低材料的冲击韧性,提高韧脆转变温度,预应变水平越高,其低温韧性下降越明显。With its higher strength and low temperature toughness,high strength steel used in car body is attracting increasingly attention.In this article,the instrumental impact test is used to evaluate low temperature toughness of QP980,a kind of the third generation auto steel.The ductile-brittle transition temperature（DBTT）is obtained from the results of the impact test.The prestrain is used to evaluate the effect of plastic deformation on low temperature toughness.The results indicate that plastic deformation will decrease impact toughness and increase its DBTT.With larger prestrain,low temperature toughness decreases greatly.

关 键 词：QP980钢 低温脆性 预应变 仪器化冲击 

分 类 号：TG142.1[一般工业技术—材料科学与工程]