摘要
基于功能梯度材料(FGM)的思想制备多层金属热锻模是提高模具寿命的有效方法。采用焊条电弧堆焊制备了多层金属热锻模的原型试样,试样经焊后热处理后,进行了金相组织分析、显微硬度测试、磨损实验和冲击韧性测试等实验。实验结果表明:钴基合金堆焊层与W6Mo5Cr4V2堆焊层界面冶金结合情况良好;截面显微硬度呈梯度分布,表面钴基合金硬度达到492HV;制备的多层金属试样耐磨性是H13钢耐磨性的2.5倍,冲击韧性处于合理范围。
Multilayer metal hot forging die is an effective method to improve the service life of the die based on the idea of FGM.The samples of multi metal hot forging die were prepared through shiel-ded metal arc welding herein.After post weld heat treatment,the microstructure analysis,microhard-ness test,wear test and impact toughness test were done.The test results show that,interface of cobalt alloy surfacing layer and W6Mo5Cr4V2 surfacing layer bonds in good condition.The microhardness of cross section is in gradient distribution and the surface hardness of cobalt alloy reaches 492 HV.Wear resistance is 2.5 times that of H13 and the impact toughness is in a rational range.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2015年第6期828-830,836,共4页
China Mechanical Engineering
基金
国家自然科学基金资助项目(51475346)
湖北省自然科学基金资助项目(2012FFB05108)
关键词
功能梯度材料
热锻模
钴基合金
堆焊
梯度分布
functionally gradient material（FGM）
hot forging die
cobalt alloy
surfacing welding
gradient distribution
