轧后保温时间对20MnSiV钢的组织和硬度的影响  

Effect of Holding Time on Microstructure and Hardness of 20MnSiV Steel after Rolling

作　　者：张哲平[1] 马英伟 宁保群[2] 

机构地区：[1]天津钢管集团股份有限公司,天津300301 [2]天津理工大学材料科学与工程学院,天津300384

出　　处：《热加工工艺》2017年第17期144-145,154,共3页Hot Working Technology

基　　金：国家自然科学基金项目(51104107);天津市自然科学基金项目(12JCYBJC11800)

摘　　要：采用Gleeble-1500热力模拟试验机进行热变形实验,研究了轧后不同保温时间(0~600 s)对20Mn Si V钢的组织和显微硬度的影响。结果表明:无论是在奥氏体再结晶区(1050℃)轧制还是在(γ+α)两相区(750℃)轧制,随着轧后保温时间的延长,V元素充分发挥了在钢筋中的析出强化和细晶强化的作用,铁素体和珠光体晶粒都明显细化,改善了钢材的性能。The thermal deformation experiment was carried out by using Gleeble-1500 thermal simulator. The effects of different holding time （0-600 s） on the microstructure and micro-hardness of 20MnSiV steel after rolling were studied. The results show that： whether the steel is rolled in the austenite recrystallization zone （1050 ℃） or in the （γ＋α） two-phase region （750 ℃）, with the extension of holding time after hot roiling, the V element gives full play to the role of precipitation strengthening and fine grain strengthening, both ferrite and pearlite grains are obviously refined, and the properties of the steel are improved.

关 键 词：20MnSiV钢 保温时间 组织 析出强化 

分 类 号：TG335[金属学及工艺—金属压力加工] TG142.1[一般工业技术—材料科学与工程]