硅含量对机械加工高速钢刀具材料的铸造性能的影响  

Influence of Silicon Content on Casting Properties of High Speed Steel Machining Tool Materials

作　　者：廉冰娴[1] 樊文渊 LIAN Bingxian;FAN Wenyuan(Shanxi Institute of Mechanical and Electrical Engineering,Changzhi 046000,China;Shanxi Aerospace Qinghua Equipment Co.,Ltd.,Changzhi 046000,China)

机构地区：[1]山西机电职业技术学院,山西长治046000 [2]山西航天清华装备有限责任公司,山西长治046000

出　　处：《热加工工艺》2022年第17期66-68,共3页Hot Working Technology

摘　　要：在M2机械加工高速钢中添加不同含量的硅制备了刀具材料,并进行了试样铸态显微组织和铸造性能的测试与分析。结果表明:随硅含量逐渐增加,试样的显微组织先细化后粗化,试样的流动性先基本不变后急剧下降,试样的抗热裂性先提升后下降。与不含硅的M2高速钢相比,当钢中添加0.5%或1.0%硅时,钢液流程长度无明显变化,试样的流动性基本不变;当硅含量增加至1.5%时,钢液流程长度减小9.89%,试样流动性明显变差。与不含硅的M2高速钢相比,当钢中添加1.0%硅时,裂纹长度减小48.21%,试样抗热裂性最佳。Tool materials were prepared by adding different silicon contents in M2 machining high speed steel. The test and analysis of cast microstructure and casting properties of samples were carried out. The results show that with the increase of silicon content, the microstructure of the sample is refined first and then coarsening, the fluidity of the sample is basically unchanged and then decreases dramatically, and the hot cracking resistance of the sample increases first and then decreases.Compared with those of M2 high speed steel without silicon, the flow length of the liquid steel with 0.5% and 1.0% silicon has no obvious change and the fluidity of the sample is basically unchanged;when the silicon content increases to 1.5 %, the flow length of the liquid steel decreases by 9.89% and the fluidity of the sample is obviously worse. Compared with those of M2high speed steel without silicon, the crack length of the steel with 1.0%Si decreases by 48.21%, the hot cracking resistance of the sample is the best.

关 键 词：M2高速钢 铸造性能 流动性 抗热裂性 SI含量 

分 类 号：TG211[金属学及工艺—铸造] TG213