[问]:焊接硬质合金刀具时,如何防止刀片出现裂纹? (上海第一石油机械厂工具车间) [答]:在制造硬质合金刀具时,常因在刀片上出现裂纹而报废。其原因是多种多样的,并且是相互密切牵连的。如:刀槽形状的设计、刀片质量,焊接用的焊料,焊接工艺及刃磨时砂轮的选择……等等,在这里我们主要谈谈与焊接有关的因素。一、刀具设计 [Q]: How to prevent the blade from cracking when welding the carbide tool? (Shanghai No.1 Petroleum Machinery Factory) [Answer]: When making a carbide tool, it is often scrapped due to the crack on the blade. The reasons for this are varied and closely inter-related. Such as: the shape of the blade design, blade quality, welding solder, welding process and the choice of grinding wheel grinding ... ... and so on, where we mainly talk about the welding-related factors. First, the tool design