硬质合金与Cr12冷作钢的微波焊接工艺  

Microwave welding of cemented carbide to Cr12 cold-working steel

作　　者：周承商[1] 易健宏[1] 罗述东[1] 彭元东[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,长沙410083

出　　处：《焊接学报》2010年第4期41-44,共4页Transactions of The China Welding Institution

基　　金：中国博士后科学基金资助项目(20060400882);中南大学博士后科学基金资助项目(No.5)

摘　　要：探讨了采用微波高温技术焊接WC-Co硬质合金与Cr12冷作钢的可行性.试验中将硬质合金混合粉直接压制在清洁的冷作钢基底表面,而后在微波多模腔中高温处理.结果表明,在升温速度约103℃/min,测量温度在1000～1100℃,保温时间小于10min的条件下能够实现硬质合金与Cr12钢的有效焊接,整个过程约20min.SEM分析显示,样品焊缝纯净,基底合金元素向硬质合金层扩散,具有良好的结合效果.微波焊接工艺结合了硬质合金烧结与硬质合金和冷作钢的焊接,从而周期短、步骤简单,有一定的发展前景,但也面临焊接条件苛刻、硬质合金欠烧以及基底烧蚀等问题.The feasibility of welding WC-Co cemented carbide to Cr12 cold-working steel via microwave energy was investigated.Cemented carbide powders were directly consolidated on clean Cr12 substrate surface and then heated at high temperatures in a multimode microwave furnace.The results show that under appropriate conditions such as 103 ℃/min heating rate,1 000-1 100 ℃ temperature and bellow 10 min soaking time,the cemented carbide can effectively be welded on the Cr12 substrate,and the whole processing cycle is approximately 20 min.SEM measurements reveal the formation of clean boundaries and the atomic diffusion from Cr12 to WC-Co.Microwave welding technique which combines the sintering of cemented carbide with the wielding of cemented carbide and Cr12 steel can reduce processing cycle and steps and have a potential prospect,but face harsh welding terms,under-sintering of cemented carbide and substrate etching.

关 键 词：微波 焊接 硬质合金 冷作钢 

分 类 号：TG496[金属学及工艺—焊接]