铈对5CrNiMo模具钢力学性能的影响  

Effect of Ce on mechanical properties of 5CrNiMo die steel

作　　者：高文海 郭洪飞[1,2] 郝新[2] 何智慧[2] 刘润平 

机构地区：[1]内蒙古北方重工集团包头北方锻造有限责任公司,内蒙古包头014033 [2]内蒙古工业大学材料科学与工程学院,内蒙古呼和浩特110051

出　　处：《炼钢》2009年第1期60-62,共3页Steelmaking

摘　　要：通过研究在5CrNiMo模具钢中添加不同量稀土Ce后的强度、塑性和弹性模量的变化,对5CrNiMo模具钢的低周疲劳寿命进行了估算。结果表明:稀土Ce添加量在适当的范围内可显著提高强度和塑性,并且当稀土Ce添加量为0.20%(质量分数)时,5CrNiMo钢的强度、塑性达到最好,比不添加稀土Ce的5CrNiMo钢在相同断裂循环数Nf′=100时,总应变范围ΔεT提高61.2%。The alteration of the strength, plasticity and elastic ratio of 5CrNiMo die steel with four different additions of RE Ce is studied. The low cyclic fatigue life of 5CrNiMo die steel is calculated by studies on the changes of strength, plasticity and elasticity modulus after addition of different amount of the rare earth Ce into the die steel 5CrNiMo. The results show that strength and plasticity are improved greatly if the amount of addition of RE Ce is proper. And when the addition of RE Ce is controlled within the limit of 0. 20% the strength and plasticity of the 5CrNiMo steel are maximized. Compared with the 5CrNiMo steel without RE Ce und＇er the same rapture recurrent number the scope of the overall strain △ετ rises by 61.2%.

关 键 词：铈 模具钢 强度 塑性 低周疲劳寿命 

分 类 号：TG142.13[一般工业技术—材料科学与工程]