中文摘要：

对CoCrMo合金激光选区熔化（SLM）直接制造成型工艺进行了研究,以便探索使用CoCrMo材料的个性化医用产品的更优化工艺。使用华南理工大学自主研发的Di-Metal100型SLM设备,在使用满足ASTM F75要求的CoCrMo合金进行SLM增材制造过程中,对激光功率、扫描速度、扫描间距3个关键工艺参数进行了工艺验证与分析,以便获得高致密度成型工艺参数,并对此工艺参数下成型件的性能进行测试。结果显示,在激光功率为170W,扫描间距为0.08mm,扫描速度为500mm/s时获得致密度为99.02%,此时CoCrMo合金SLM直接制造样件的抗拉强度、屈服强度σ0.2以及洛氏硬度均高于ASTM F75铸造标准,延伸率略低。通过对CoCrMo合金SLM增才制造工艺的优化,可以制造出性能上能够满足医用产品指标的CoCrMo合金个性化医用产品,从而为CoCrMo合金SLM个性化直接制造应用提供重要参考。

英文摘要：

The process of selective laser melting （SLM） direct manufacturing based on CoCrMo alloy is studied to explore the optimized process of CoCrMo personalized medical products that are in increasing demand. SLM equipment Di-Metal100 self-developed by South China University of Technology is used. When the CoCrMo alloy satisfying the requirement of ASTM F75 is manufactured by SLM, three critical process parameters including laser power, scanning speed and scanning space are carried out process validation and analysis so that the process parameters with high relative density is obtained and through which the mechanical performance of parts manufactured is tested. The result shows that with the laser power of 170 W, scanning space of 0.08 mm and scanning speed of 500 mm/s, CoCrMo alloy samples manufactured directly by SLM with 99.02 % relative density are obtained. Their tensile strength, yield strength ao. 2 and Rockwell hardness are all higher than the casting standard of ASTM F75 and their elongations are slightly lower. Through the process optimization of SLM direct manufacturing based on CoCrMo alloy, CoerMo alloy personalized medical products meeting the target of medical product in performance can be manufactured, which provides important reference for personalized SLM direct manufacturing based on CoerMo alloy.