CAJ | 학술논문

为了评价不同表面处理后 DZ40M 定向凝固高温合金表面塑性变形及高温再结晶程度，为表面处理工艺和参数选择提供依据，采用冷喷涂粒子冲击和喷砂对高温合金表面进行处理，经过1000和1100℃保温处理，考察了合金析出碳化物和表面再结晶的相互作用，并分析了表面处理方法对合金表面塑性层和再结晶层深度的影响。结果表明：冷喷涂粒子冲击和喷砂处理后的 DZ40M 高温合金在1000和1100℃下热处理后，表面均形成再结晶层；热处理时的二次析出碳化物对再结晶晶粒有一定的抑制作用；冷喷涂 CoNiCrAlY 粒子冲击后，合金表面塑性变形层的深度和维氏硬度均远低于喷砂处理的，其再结晶层厚度较小；冷喷涂 CoNiCrAlY 粒子冲击后的合金表面再结晶层厚度受热处理温度影响显著；退火可部分降低合金表面塑性层的加工硬化程度，但对塑性变形层深度无明显影响。
위료평개불동표면처리후 DZ40M 정향응고고온합금표면소성변형급고온재결정정도，위표면처리공예화삼수선택제공의거，채용랭분도입자충격화분사대고온합금표면진행처리，경과1000화1100℃보온처리，고찰료합금석출탄화물화표면재결정적상호작용，병분석료표면처리방법대합금표면소성층화재결정층심도적영향。결과표명：랭분도입자충격화분사처리후적 DZ40M 고온합금재1000화1100℃하열처리후，표면균형성재결정층；열처리시적이차석출탄화물대재결정정립유일정적억제작용；랭분도 CoNiCrAlY 입자충격후，합금표면소성변형층적심도화유씨경도균원저우분사처리적，기재결정층후도교소；랭분도 CoNiCrAlY 입자충격후적합금표면재결정층후도수열처리온도영향현저；퇴화가부분강저합금표면소성층적가공경화정도，단대소성변형층심도무명현영향。
In order to evaluate the extent of plastic deformation and high-temperature recrystallization after different surface treat-ments,directionally solidified superalloy DZ40M was impacted by cold spray particles and also by grit blasting.The treated sam-ples were heat treated at 1 000 ℃ and 1 100 ℃ and the interaction of recrystal grain with precipitated carbide was investigated. The effects of the surface treatment on the thickness of plastic deformation and recrystallization layers were also studied.The results show that recrystal regions can be observed after surface treatments of both cold spray impacting and grit blasting on the surface of DZ40M after heat treated at 1 000 ℃ and 1 100 ℃.The precipitated carbide during heat-treating restrains the recrystal grain to some extent.The thickness and micro hardness of the plastic deformation layer by CoNiCrAlY particle impacting are much lower than that by grit blasting,which resulted in a thinner recrystal layer on the surface of DZ40M.The temperature has a significant effect on the thickness of the recrystal layer in regard to cold spray impacting treatment.The annealing can partially eliminate the work hardening of plastic deformation layers,but has no obvious influence on their thickness.