CX合金钢选区激光熔化工艺及性能研究

Study on Selective Laser Melting Process and Mechanical Property of CX Alloy Steel

为了研究CX合金钢选区激光熔化(SLM)成形工艺参数及性能,通过改变激光功率及扫描速度,研究了不同工艺参数对SLM成形组织及力学性能的影响规律。结果表明,随着激光功率逐渐增大,沉积态试样孔隙率先减小后增大,试样相对密度先增大后减小,而试样力学性能先增大后减小。激光功率300 W、扫描速度950 mm/s时,试样孔隙率为0.012%,相对密度为99.84%;抗拉强度为1135 MPa,屈服强度为1005 MPa,伸长率为19.3%。

Effect of microstructure and mechanical properties of CX alloy steel made by Selective Laser Melting(SLM)with different laser powers and scanning speed was studied.The results showed that porosity and relative density of the CX alloy steel first decreased,and then increased with the increase of laser power.Mechanical properties of the CX alloy steel first increased,and then decreased with laser power increased;The best process window is that laser power at 300 W and scanning speed at 950 mm/s,respectively;the responding porosity,relative density,ultimate strength,yield strength and elongation was 0.012%,99.84%,1135 MPa,1005 MPa and 19.3%,respectively.