摘要
分析了铜管穿孔针的失效形式，报道了改进型马氏体热作模具钢ＨＤ２的主要力学性能及其在穿孔针上的应用。ＨＤ２钢因合理的合金化设计获得优良的强韧性，在相同的生产条件下，ＨＤ２钢制作的穿孔针使用寿命比３Ｃｒ２Ｗ８Ｖ钢的提高１０倍以上。
The working conditions and forms of failure of the piercing rod of copper pipes are in-vestigated. The modified martensitic hot work tool steel type HD2 can meet the strict require-ments of the piercing rod for withstanding high temperature. high pressure, severe frictionand repeated rapid cycles of heating and cooling during copper pipe extrusion. A comparisonof the main mechanical properties of steel type HD2 with the type 3Cr2W8V and its applica- tion as the material for the piercing rod are reported.It is shown that the yield strength ofsteel HD2 at room temperature and 7 50℃ is 26.9%and 73.6%higher than that of3Cr2W8V,respectively and,at the same hardness level(HRC 42～43),the fracture tough-ness of steel HD2 is 61.7%higher than that of 3Cr2W8V. The service life of the piercingrodmade of steel HD2 is about 10 times longer than that of 3Cr2W8V under identical workingconditions.
出处
《华中理工大学学报》
CSCD
北大核心
1995年第12期126-128,共3页
Journal of Huazhong University of Science and Technology
关键词
铜管
穿孔针
失效
力学性能
使用寿命
piercing rod for copper pipes
failure
mechsnical properties
service life
