摘要
设计了汽车用Ti＋P-IF钢、Ti＋Nb-IF钢组成,通过试验将其与传统的汽车用IF钢性能进行比较,测试和分析了热处理工艺对3种钢材力学性能以及金相组织的影响。结果表明：Ti＋P-IF钢力学性能优于Ti＋Nb-IF钢和传统IF钢,当退火温度为825℃,其屈服强度为186 MPa,抗拉强度为412 MPa,伸长率为36.3%,硬化指数为0.2。P和Nb元素在Ti＋IF钢中起到固溶强化作用,有助于提高IF钢拉伸强度和屈服强度。退火后的Ti＋P-IF钢金相组织中呈网络结构,晶粒尺寸为20~100μm左右,有利于消除轧制过程中形成的晶体缺陷。
The composition of Ti＋P-IF steel, Ti＋Nb-IF steel used in car was designed. The properties were compared with traditional IF steel through experiment, the influence of heat treatment process on the mechanical properties and microstructure of the steel was studied. The results show that the mechanical properties of Ti＋P-IF steel is better than Ti＋Nb-IF steel and traditional IF steel, whtat＇s more, when the annealing temperature is 825 ~C, the yield strength is 186 MPa, tensile strength is 412 MPa, elongation is 36.3% and hardening index is 0.2. P element and Nb element can play the role of solid solution strengthening in Ti＋IF steel, which helps to improve the tensile strength and yield strength of IF steel. The microstructure of Ti＋P-IF steel exhibit network structure after annealing, and grain size is about 20-100 μm, which is good for eliminating the crystal defects formed fi＇om the process of rolling.
出处
《铸造技术》
CAS
北大核心
2016年第4期666-669,共4页
Foundry Technology
关键词
IF钢
热处理工艺
力学性能
组织和结构
IF steel
heat treatment process
mechanical properties
microstructure
