摘要
为了稳定和提高精铸热锻的使用寿命,研究了其失效形式和机理.研究结果表明:材质及工艺决定了精铸热锻模具呈现不同的失效形式和寿命.不恰当的材质及工艺导致热锻模具出现早期断裂失效,失效形式不合理,寿命较低.经改进材质及工艺后,热磨损、塑性变形为主要失效形式,而未出现早期断裂失效,寿命得到明显提高,稳定在6000～7000件,高于锻造模具钢80%以上.
To improve and stabilize the service life of hot-forging die fabricated by cast die steer, the failure modes and mechanism were analyzed. Results show that different failure modes and lives are dependent on the material composition and subsequent processing. Improper material composition and processing can cause earlier fracture failure and short life happened to the hot-forging dies. With improvement of material composition and processing, the failure modes demonstrate predominately elevated wear and plastic deformation, and no earlier failure occurred, leading to a considerable improvement of service life and a stable number of 6000～7000 times, 80% more than forging steel dies.
出处
《吉林大学学报（工学版）》
EI
CAS
CSCD
北大核心
2005年第6期567-571,共5页
Journal of Jilin University:Engineering and Technology Edition
基金
"863"国家高技术研究发展计划项目(2002AA331180)
国家计委产业化前期关键技术与成套设备研制开发项目(1999317)
关键词
材料失效及保护
热锻模具
精铸模具
失效分析
使用寿命
失效形式
material failure and protection
hot-forging die
cast-steel die
failure analysis
service life
failure pattern
