连续矫直条件下Q235钢热变形行为的实验研究  

Research on Elevated Temperature Characteristics of Q235 Steel During Continuous Straightening

作　　者：满媛[1] 李宪奎[1] 杨拉道[2] 

机构地区：[1]燕山大学机械工程学院,河北秦皇岛066004 [2]中国重型机械研究院,陕西西安710032

出　　处：《热加工工艺》2008年第13期11-14,共4页Hot Working Technology

基　　金：河北省自然科学基金资助项目(E2006000235)

摘　　要：在连续矫直过程中,铸坯温度高,坯壳处于高温、低应变和低应变速率的状态。以Q235钢为例,在Gleeble3500型热/力模拟试验机上进行了普碳钢在连续矫直工艺条件下的高温流变曲线的测定,高温蠕变、应力松弛等实验,并通过金相组织观察了该材料热变形的组织特性。实验结果表明,在实验条件下,高温流变曲线为动态再结晶型,并且蠕变及应力松弛的速度都很快。在连铸生产中充分利用这些特性,对提高连铸坯的质量以及产量都有着很重要的意义。In the process of the continuous straightening during continuous casting, the temperature of steel slab is very high, the characteristic of deformation is low strain and low strain rate. The experiments of elevated rheopectic curve, elevated temperature creep and stress relaxation under the conditions of continuous straightening were carried on Gleeble3500 thermal-force simulation machine . The results indicate that the rheopectic curve is dynamic recrystallizing shape, and both the creep speed and the stress relaxation speed are very fast. Using the characteristics has a great importance to improve the quality and productivity of billets in the continuous casting.

关 键 词：连续铸钢 连续矫直 流变曲线 蠕变 应力松弛 

分 类 号：TG142.1[一般工业技术—材料科学与工程]