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以低碳硅锰钢为研究对象,采用Q&PB与奥氏体形变+Q&PB两种工艺,利用Gleeble-3500热模拟试验机、SEM以及拉伸试验机等对奥氏体形变对其组织及力学性能的影响进行研究。结果表明:试样经奥氏体形变之后,显微组织由粗大板条贝氏体、块状M/A岛以及马氏体演变成较细板条贝氏体以及M/A岛,块状马氏体数量减少,显微组织得到明显细化;抗拉强度由1038 MPa降到1012 MPa,伸长率由11.8%提高到13.9%,强塑积得到提高,综合力学性能得到改善。
Taking low-carbon Si-Mn steel as the research object, using Q & PB and austenite deformation + Q & PB two technologies, using Gleeble-3500 thermal simulation testing machine, SEM and tensile testing machine on the microstructure and mechanical properties of austenite The impact of research. The results show that the microstructure changes from coarse lath bainite, massive M / A island and martensite to thinner lath bainite and M / A island after austenite deformation, The amount of martensite decreases, and the microstructure is obviously refined. The tensile strength decreases from 1038 MPa to 1012 MPa, the elongation increases from 11.8% to 13.9%, the plastic product increases and the comprehensive mechanical properties improve.