钛锶复合添加对汽车零部件压铸用模具钢性能的影响
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摘要
对汽车零部件压铸用3Cr2W8V模具钢进行了钛锶复合添加改性,并对高温磨损试验和热疲劳试验结果进行了分析。结果表明:钛锶复合添加对3Cr2W8V模具钢的耐磨损性能和热疲劳性能产生了重要影响。与未添加钛锶的3Cr2W8V模具钢相比,添加了0.3%Ti和0.3%Sr的3Cr2W8V-0.3Ti-0.3Sr模具钢磨损体积、主裂纹平均宽度和主裂纹平均深度分别减小了35.7%、44.8%、57.1%,耐磨损性能和热疲劳性能得到明显提高。
In this paper,3 Cr2 W8 V die steel for casting of automotive parts was modified by Ti-Sr composite addition,and the results of high temperature wear test and thermal fatigue test were analyzed.The results show that the addition of Ti and Sr has an important effect on the wear resistance and thermal fatigue properties of 3 Cr2 W8 V die steel.Compared with the 3 Cr2 W8 V die steel without Ti and Sr,the wear volume,the average width and depth of the main crack for the steel with 0.3% Ti and 0.3% Sr respectively decrease by 35.7%,44.8% and 57.1%.The wear resistance and thermal fatigue properties of the die steel with 0.3% Ti and 0.3% Sr are improved.
In this paper,3 Cr2 W8 V die steel for casting of automotive parts was modified by Ti-Sr composite addition,and the results of high temperature wear test and thermal fatigue test were analyzed.The results show that the addition of Ti and Sr has an important effect on the wear resistance and thermal fatigue properties of 3 Cr2 W8 V die steel.Compared with the 3 Cr2 W8 V die steel without Ti and Sr,the wear volume,the average width and depth of the main crack for the steel with 0.3% Ti and 0.3% Sr respectively decrease by 35.7%,44.8% and 57.1%.The wear resistance and thermal fatigue properties of the die steel with 0.3% Ti and 0.3% Sr are improved.
引文
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[2] Li Wenzhen,Qu Nan.Wear resistance of hot work steel at elevated temperature for magnesium die casting[J].Special Casting & Nonferrous Alloys,2007,27(7):525-528.(李文珍,曲楠.镁合金压铸用热作模具钢高温磨损特性研究[J].特种铸造及有色合金,2007,27(7):525-528.)
[3] Qiu Qingzhong,Xiao Feng,Zhang Zhongqiu,et al.Heat treatment and deep cryogenic treatment of hot die steel[J].Iron Steel Vanadium Titanium,2012,33(1):91-94.(邱庆忠,肖峰,张中秋,等.热作模具钢热处理工艺及深冷处理研究[J].钢铁钒钛,2012,33(1):91-94.)
[4] Xiang Jun,Li Chengyang,Wang Haoyu,et al.Microstructure and properties of titanizing layer on die steels by salt bath metal cementation[J].Tool Technology,2016,50(9):27-30.(向俊,李承洋,王浩宇,等.模具钢表面盐浴渗钛层的制备及性能研究[J].工具技术,2016,50(9):27-30.)
[5] Chen Xuemei.Development of new die-casting mold steel[J].Metallurgical Collfctions,2011(4):10-12.(陈雪梅.新型压铸用模具钢的开发[J].冶金丛刊,2011(4):10-12.)
[6] Wang Zhenguang.Effect of vanadium and strontium addition on thermal fatigue properties of 5CrNiMo hot work die steel[J].Iron Steel Vanadium Titanium,2018,39(2):74-77.(王振光.钒锶添加对5CrNiMo热作模具钢热疲劳性能的影响[J].钢铁钒钛,2018,39(2):74-77.)
[7] Ji Chengmei,Zhao Hui,Lu Jianhui,et al.Effect of co-permeation of vanadium-titanium-cerium on properties of hot work die steel[J].Iron Steel Vanadium Titanium,2017,38(6):59-63.(纪成美,赵辉,陆建辉,等.钒钛铈共渗对热作模具钢性能的影响[J].钢铁钒钛,2017,38(6):59-63.)
[8] Liu Weidong,Lin Cuiqing.Vanadium-titanium composite infiltration process on the surface of cold working die steel[J].Iron Steel Vanadium Titanium,2016,37(1):61-64.(刘卫东,林翠青.冷作模具钢表面的钒—钛复合渗工艺研究[J].钢铁钒钛,2016,37(1):61-64.)
[9] Zeng Yan,Wu Xiaochun,Xia Shuwen,et al.Influence of Ni on the thermal stability of a new die casting steel[J].Materials Review,2017,31(16):72-75.(曾艳,吴晓春,夏书文,等.镍元素对新型压铸模具钢热稳定性的影响[J].材料导报,2017,31(16):72-75.)