金属注射成形冷作工具钢的超声疲劳性能  

Ultrasonic fatigue property of metal injection molded cold work tool steel

作　　者：K.Doi K.Hanami T.Teraoka S.Terauchi T.Sugimoto 韩风麟 

机构地区：[1]Osaka Yakin Kogyou Co.Ltd.,Higashiyodogawa-Ku,Osaka 553-0005,Japan [2]Kansai University ORDIST,Suita-shi,Osaka 564-8680,Japan

出　　处：《粉末冶金技术》2005年第2期88-90,共3页Powder Metallurgy Technology

摘　　要：用超声疲劳试验研究了金属注射成形(MIM)冷作工具钢和锻轧钢(JISSKD11)的高周疲劳性能。锻轧钢试样于423K回火1h。另一方面,为了评估回火温度对疲劳性能的影响,将MIM钢试样于不同温度下进行了回火。在N=103～108疲劳寿命范围内进行了超声疲劳试验。MIM钢试样的疲劳强度和锻轧钢试样相同。MIM钢试样的疲劳强度随着回火温度升高而减低。显微组织的观察结果表明,MIM钢试样的碳化物的直径与形状比锻轧钢试样的均一。High cycle fatigue properties of metal injection molded(MIM)cold work tool steel and wrought steel(JIS SKD11)were investigated via ultrasonic fatigue test.The wrought steel specimens were tempered at 423K for 1 hour.On the other hand,the MIM steel specimens were tempered at various temperatures in order to evaluate effect of tempering temperature on fatigue property.The ultrasonic fatigue tests were performaed in the fatigue life range of N=103～108.Fatigue strength of the MIM steel specimens was equivalent to that of the wrought steel specimens.Fatigue strength of the MIM specimens declined with increasing tempering temperature.The results of microstructure observation showed that diameter and shape of carbide of the MIM specimens were uniform than those of the wrought steel specimens.

关 键 词：金属注射成形 冷作工具钢 高周疲劳性能 超声疲劳试验 疲劳强度 MIM 试验研究 回火温度 疲劳寿命 温度升高 显微组织 试样 轧钢 碳化物 

分 类 号：TF124.39[冶金工程—粉末冶金] TG142.45[冶金工程—冶金物理化学]