热处理参数对电熔增材材料EAM16MND5组织和力学性能的影响

从消除应力热处理循环次数、热处理保温温度、热处理保温时间和热处理类别4个因素考虑,研究了8种不同的热处理工艺条件下电熔增材制造材料EAM 16MND5强度、冲击韧性和微观组织的变化情况。材料内部应力对材料强度的影响较大,在消除应力后,不同的热处理循环次数、热处理温度对材料强度影响较小;模拟焊后热处理时间对材料强度影响较小,但是对冲击韧性的影响较大,且经过两次消应力热处理循环的材料冲击性能优于一次消应力热处理的材料;消应力热处理和模拟焊后热处理过程中,碳化物有向晶界扩散、并在晶界聚集的倾向。

Effects of heat treatment parameters on microstructure and mechanical properties of EAM16MND5 steel by electrical additive manufacturing

The microstructure and mechanical properties of EAM16MND5 steel by electrical additive manufacturing were investigated by electrical additive manufacturing in eight different heat treatment parameters by the number of thermal cycles,the temperature,holding time and the kind of heat treatment factors. The experimental results showed that the strength of the material was changed less in different thermal cycles or the temperatures of heat treatment after stressrelieving heat treatment. The effect of the holding time on simulated stress relieving heat treatment was less for material strength,but more for impact ductility,and the impact ductility was more excellent for the material with second stress relieving heat treatment than the first. The carbide was diffusing to the intergranular and assembling during stress relieving heat treatment and simulated stress relieving heat treatment.