矿用WC-Co硬质合金球齿的失效分析与改善  

Failure Analysis and Improvement of WC-Co Cemented Carbide for Mine

作　　者：文晓 Wen Xiao(Xiamen Tungsten Co.,LTD.,Xiamen 361009,Fujian)

机构地区：[1]厦门钨业股份有限公司技术中心

出　　处：《福建冶金》2019年第6期23-27,共5页Fujian Metallurgy

摘　　要：本文对两个不同使用寿命的失效钻头的合金齿进行取样,对合金球齿进行详细的分析,包括断裂模式,裂纹扩散模式等,以期能找出引起合金失效的主要原因,从而对产品进行有针对性的改善。结果表明,合金齿失效形式有合金碎裂、磨损和断裂,失效原因包括合金的强韧性不足、合金缺陷、周期性和突发性冲击载荷以及摩擦热造成的冲击疲劳和热疲劳裂纹。In this paper,the alloy teeth of two failure drills with different service lives are analyzed,and the alloy spherical teeth are analyzed in detail,including fracture mode and crack propagation mode,in order to find out the main causes of alloy failure and improve the products.The results show that the failure modes of alloy teeth are alloy fragmentation,wear and fracture.The failure causes include insufficient strength and toughness,alloy defects,periodic and sudden impact loads,and impact fatigue and thermal fatigue cracks caused by friction heat.

关 键 词：硬质合金 矿用球齿 失效分析 

分 类 号：TD421.25[矿业工程—矿山机电]