冷镦钢ML40Cr盘条的热变形抗力  

Deformation Resistance of ML40Cr Cold Heading Steel

作　　者：高秀华[1] 庞波[1] 邱春林[1] 齐克敏[1] 田彦文[1] 袁立忠[2] 吴水龙[2] 

机构地区：[1]东北大学 [2]湖南华菱湘潭钢铁有限公司,湖南湘潭411101

出　　处：《机械工程材料》2006年第12期69-71,共3页Materials For Mechanical Engineering

基　　金：中国博士后科学基金(2005038592)

摘　　要：采用 Gleeble-3800型热模拟试验机和单道次压缩试验对 ML40Cr 冷镦钢金属塑性变形抗力进行了研究。结果表明:在一定的变形程度下,塑性变形的 ML40Cr 冷镦钢仍存在强化,变形抗力随变形程度的增加而增加,在低应变速率下,温度大于1000℃时发生动态再结晶;变形抗力随着变形速率的增加而增大;多数情况下,变形温度增高,变形抗力降低,只有在两相区低应变速率下出现相反的情况。同时建立了 ML40Cr 冷镦钢变形抗力数学模型,为冷镦钢低温轧制计算轧制力提供了理论依据。The metal-plastic deformation resistance of ML40Cr steel had been studied by isothermal compression test in the Gleeble-3800. The results show that ML40Cr steels after plastic deformation have strengthen. The deformation resistance increase with increasing deformation degree. Dynamic recrystallization occur at low strain rate and more than 1 000 ℃. The deformation resistance increase with increasing strain rate. Most of condition, the flow stress decrease with the increase of deforming ternperature, on the contrary in two-phase region and low strain rate. Additionally, the deformation resistance expression is regressed using origin soft. It could offer theoretic base to calculate rolling force of ML40Cr steel.

关 键 词：冷镦钢 热模拟 变形抗力 

分 类 号：TG335.6[金属学及工艺—金属压力加工]