钒微合金化对5CrNiMo模具钢组织与性能的影响分析  

Influence of vanadium-microalloying on microstructure and property of 5CrNiMo die steel

作　　者：张玉平[1] 韦光珍[1] 王梦涵 Zhang Yuping;Wei Guangzhen;Wang Menghan(Chongqing Industry Polytechnic College,Chongqing 401120,China;College of Materials Science and Technology,Chongqing University,Chongqing 400044,China)

机构地区：[1]重庆工业职业技术学院,重庆401120 [2]重庆大学材料科学与工程学院,重庆400044

出　　处：《钢铁钒钛》2022年第3期146-151,共6页Iron Steel Vanadium Titanium

基　　金：重庆市教育委员会科学技术研究项目(编号:KJQN202103205,KJZD-K201903201)。

摘　　要：在5CrNiMoV模具钢试样中添加了不同含量的合金元素钒,制备了不同钒含量的5CrNiMoVx(x=0, 0.1, 0.2, 0.3, 0.4, 0.5)模具钢试样,并采用金相和扫描电镜对试样显微组织进行分析,测试了试样的抗热裂性能和耐高温磨损性能。结果表明,添加合金元素钒有助于细化5CrNiMoV模具钢试样的显微组织,提高其抗热裂性能和耐高温磨损性能。随钒含量逐渐增加,模具钢试样的显微组织先细化后粗化,抗热裂性能和耐高温磨损性能先提高后下降。与不添加钒(x=0)相比,当钒含量x=0.3%时,5CrNiMoVx模具钢试样的裂纹长度减小3.4 mm、磨损体积减小16×10^(-3)mm^(3),模具钢试样的抗热裂性能和耐高温磨损性能显著提高。5CrNiMoVx (x=0, 0.1, 0.2, 0.3,0.4, 0.5)模具钢试样的钒含量优选为x=0.3%。5CrNiMoVx(x = 0, 0.1, 0.2, 0.3, 0.4, 0.5) with different vanadium contents were prepared by adding different amounts of alloying element vanadium into the 5CrNiMoV die steel. The microstructure of the sample was analyzed by optical and scanning electron microscopes, and the hot cracking resistance and high temperature wear resistance of the sample were tested. The results show that the addition of vanadium helps refine the microstructure of 5CrNiMo die steel and improves its hot cracking resistance and high temperature wear resistance. With the increase of vanadium content, the microstructure of die steel samples is refined first and then coarsened, and the hot cracking resistance and high temperature wear resistance are improved first and then decreased. When the vanadium content is 0.3%,the crack length and wear volume of 5CrNiMoVx die steel are reduced by 3.4 mm and 16×10^(-3)mm^(3), respectively. The optimum vanadium content of 5CrNiMoVx(x = 0, 0.1, 0.2, 0.3, 0.4, 0.5) die steel sample is x = 0.3%.

关 键 词：5CrNiMoV模具钢 钒微合金化 抗热裂性 耐高温磨损性能 

分 类 号：TF76[冶金工程—钢铁冶金] TG375[金属学及工艺—金属压力加工]