深冷处理对W6Mo5Cr4V2高速钢硬度和冲击性能的影响  

Influence of cryogenic treatment on hardness and impact toughness of W6Mo5Cr4V2 high speed steel

作　　者：董良 闫献国[1] 陈峙 寇国富 李俊吉[1] 陈高华 赵桐羽 李佳乐 Dong Liang;Yah Xianguo;Chen Zhi;Kou Guofu;Li Junji;Chen Gaohua;Zhao Tongyu;Li Jiale(Department of Mechanical Engineering,Taiyuan University of Science and Technology,Taiyuan Shanxi 030024,China;Tunneling Equipment Branch,China Coal Science and Technology Group Taiyuan Research Institute,Taiyuan Shanxi 030006,China;Beijing New Oriental Yangzhou Foreign Language School,Yangzhou Jiangsu 225000.China)

机构地区：[1]太原科技大学机械工程学院,山西太原030024 [2]中国煤炭科工集团太原研究院掘进装备分院,山西太原030006 [3]北京新东方扬州外国语学校,江苏扬州225000

出　　处：《金属热处理》2018年第12期144-148,共5页Heat Treatment of Metals

基　　金：国家自然科学基金(51275333)

摘　　要：采用正交试验对W6Mo5Cr4V2高速钢深冷处理工艺参数进行优化,分析了淬火温度、深冷温度、深冷次数和回火温度对高速钢硬度和冲击韧性的影响,并对试样微观形貌和碳化物析出情况进行分析。研究表明,各工艺参数对高速钢硬度影响的显著性顺序为回火温度>深冷温度>淬火温度>深冷次数,对冲击韧性影响的显著性顺序是回火温度>淬火温度>深冷次数>深冷温度。深冷处理促使高速钢细小碳化物的弥散析出及均匀分布,深冷处理后高速钢冲击断口上存在明显的韧窝和较大的河流花样。Orthogonal design test was used to optimize the cryogenic treatment of W6MoSCr4V2high speed steel.The effects of quenching temperature,cryogenic temperature,cryogenic times and tempering temperature on the hardness and impact toughness of high speed steel were analyzed.The results show that the significance order of the influence of those cryogenic treatment parameters on hardness of the high speed steel is tempering temperature >cryogenic temperature >quenching temperature >cryogenic times;the order on impact toughness is tempering temperature >quenching temperature >cryogenic times >cryogenic temperature.Cryogenic treatment can promote fine carbides dispersed precipitation and homogeneous distribution.Significant dimples and larger river patterns exist in the impact fracture of the high speed steel with cryogenic treatment.

关 键 词：W6MO5CR4V2钢 深冷处理 正交试验 硬度 冲击性能 

分 类 号：TG156.91[金属学及工艺—热处理]