摘要
通过对3Cr2W8V、4Cr5MoV1Si以及5CrNiMo、5Cr2NiMoVSi两组模具钢的热疲劳性能对比试验,证实5Cr2NiMoVSi的热疲劳性能优于5CrNiMo;循环上限温度低于670℃,4Cr5MoV1Si钢的热疲劳性能优于3Cr2W8V钢,循环上限温度为710℃时,反而3Cr2W8V钢的热疲劳抗力较好。文章分析了影响热疲劳性能的主要因素,提出了最佳硬度值范围,为指导热处理工艺提出了可靠依据,并为新材料的合理使用指出了工作温度范围。
Through the contrast experiment of thermal fatigue on two groups of diesteels 3Cr2W8V--4Cr5MoV1Si and 5CrNiMo--5Cr2NiMoVSi, it is confirmed that5Cr2NiMoVSi steel has better thermal fatigue resistance than 5CrNiMo steel.when the cycle up temperature is below 670℃, 4Cr5MoV1Si has better thermalfatigue resistance tham 3Cr2W8V, when the temperature is up to 710℃ thesituation is quite opposite. The paper analgzed the main factors that influence onthermal fatigue property and recommended optimum hardness scope.The paper pre-sents reliable basis for guiding heat treatment technology and presents properworking temperature range of the new developed material.
关键词
热疲劳性能
循环温度
模具钢
上限温度
thermal fatigue property
cycle temperature
die steel
up temperature
