700MPa微合金高强钢奥氏体高温变形行为研究  

Analysis on Austenitic Hot Deformation Behavior of 700MPa Micro-alloy High Strength Steel

作　　者：张慧云[1] 

机构地区：[1]山西工程职业技术学院机械系,山西太原030009

出　　处：《山西冶金》2014年第6期19-22,共4页Shanxi Metallurgy

摘　　要：研究了一种700 MPa微合金高强钢。在热力模拟试验机上进行了试验钢的单道次压缩试验,通过其各种变形参数的研究,建立了试验钢的变形抗力数学模型和动态再结晶模型。试验结果显示:试验钢在变形温度为950℃,应变速率为0.1 s-1;变形温度为1 000℃,应变速率为0.1 s-1;变形温度为1 050℃,应变速率为0.1s-1或1 s-1;变形温度为1 100℃,应变速率为0.1 s-1、1 s-1或5 s-1这几种条件下会发生动态再结晶。A 700 MPa micro-alloy high strength steel is studied. Single-pass pressing experiments are conducted by a thermal simulation testing machine. And the resistance of deformation and mathematical models of the dynamic crystallization deformation are built with researching various deformation parameters. Dynamic crystallization of tested steel may be happened under such conditions： deformation temperature 950 ℃, deformation rate 0.1 s^-1; deformation temperature 1 000 ℃, deformation rate 0.1 s^-1; deformation temperature 1 050 ℃, deformation rate 0.1 s^-1or 1 s^-1; deformation temperature 1 100 ℃, deformation rate 0.1 s^-1 , 1 s^-1 or 5 s^-1.

关 键 词：700MPa 微合金高强钢 动态再结晶 变形抗力 

分 类 号：TG135.1[一般工业技术—材料科学与工程]