FeCoCu prealloyed powder was prepared by coprecipitation method. The effects of the concentration of solution, temperature of coprecipitation, temperature and time of thermal decomposition on the yield and the particle size of the prealloyed powder were analyzed. The results show that good FeCoCu prealloyed powder can be prepared by coprecipitation method. The yield and the particle size increase with increasing the concentration of solution and the temperature of coprecipitation, respectively. The oxygen content of powder decrease and the particle size increase with increasing the temperature of thermal decomposition. The bulk samples sintered at 850℃ have high flexural strength, hardness and density. The welding intensity of FeCoCu prealloyed powder has satisfied the En132362001 standard on safety. The laser welding transition layer with FeCoCu prealloyed powder has higher welding intensity, better security and reliability than that of the certain overseas company.%采用共沉淀法制备了金刚石制品用FeCoCu预合金粉末,研究了共沉淀反应溶液的浓度、反应温度与还原温度、时间对粉末收得率与粒度的影响,并对其使用性能进行实用性研究.结果表明:采用共沉淀法可以制备出良好的预合金化粉末,随着混合金属盐溶液与沉淀剂溶液的浓度的增大,预合金粉未的粒度呈现明显的增加趋势,同时收得率也随之缓慢增加;随着温度的升高,粉末的粒度与收得率均呈增大趋势;随着还原温度的升高和还原时间的延长,粉末的含氧量逐渐降低,而粉末的粒度却逐渐增大.在850℃下烧结的预合金粉末烧结块体具有较高的弯曲强度和硬度,同时还具有较高的致密度.FeCoCu合金粉末过渡层的焊接强度完全达到并超过BS En13236-2001安全标准.与国外某公司过渡层相比,FeCoCu合金粉末过渡层具有更高的焊接强度以及更好的安全性和可靠性.
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