金刚石圆锯片工作层预合金粉与焊接层粉连接性能研究

Study on the bonding properties of pre-alloyed powder and welding powder in the working layer of diamond circular saw blade

使用A公司生产的预合金粉,多批次金刚石锯片在生产检验过程中出现大量刀头断裂情况,断裂位置为工作层与焊接层连接处。为了找到刀头断裂的原因,分别对现在使用的A公司生产的预合金粉和之前使用的B公司生产的预合金粉,用不同温度烧结工艺烧结制作试样块进行三点抗弯强度测试分析;以及A、B分别与C公司生产的焊接层金属粉之间的连接强度分析,A、B不同比例混合后的强度分析。通过研究分析得出,A公司生产的预合金粉对温度的反应敏感,较高温度下的性能无法达到生产要求;B公司生产的预合金粉对温度的适应范围大,在较低与较高温度下都能保持较好的性能;实际生产刀头中,烧结需要较高的温度,A与C结合强度就达不到要求从而导致刀头断裂。

For the usage of the pre-alloyed powder produced by Company A, a large number of cutter heads are broken during the production inspection of multiple batches of diamond saw blades, and the fracture position is the connection between the working layer and the welding layer. In order to find out the cause of the fracture of the cutter head, the pre-alloyed powder produced by Company A and the pre-alloyed powder produced by Company B are sintered at different temperatures, and the three-point bending strength is tested and analyzed. And the strength analysis of the connection between the pre-alloyed powder produced by Company A and B and the metal powder of the welding layer produced by Company C, and the strength analysis of the pre-alloyed powder produced by CompanyA and B mixed in different proportions are carried out. Through the research and analysis, it is concluded that the pre-alloyed powder produced by Company A is sensitive to temperature, and the performance at higher temperature can not meet the production requirements. The pre-alloyed powder produced by Company B has a wide range of temperature adaptation and can maintain the good performance at lower and higher temperatures. In the actual production of cutter head, sintering process needs higher temperature, and the bonding strength of A and C can not meet the requirements, resulting in the fracture of cutter head.