金属加工（热加工）Issue(7)：31-35,5.
原位热轧和热循环对电弧增材制造低合金钢微观组织和力学性能的影响
Effect of in situ hot rolling and hot cycling on microstructure and mechanical properties of low alloy steel manufactured by arc additive
摘要
Abstract
Utilizing in-situ hot rolling-assisted arc additive manufacturing technology,this study conducted additive remanufacturing of motor shafts with low-alloy steel wire.Through comparative analysis of single-layer and double-layer samples,the study aimed to elucidate the effects of in-situ hot rolling and thermal cycling on the microstructure and mechanical properties of low-alloy steel.The results demonstrated that the microstructure without rolling was predominantly lath martensite.After undergoing rolling,the lath martensite became fragmented and refined,and could further transform into tempered martensite under the influence of thermal cycling.The austenitic grains in the double-layer rolled samples were primarily equiaxed and exhibited characteristics of discontinuous dynamic recrystallization.Compared to the single-layer rolled samples,the average grain size of the original austenite in the double-layer rolled samples was significantly reduced from 95.1μm to 32.8μm.Furthermore,in the dilution zone of the cladding layer of the double-layer rolled samples,a notable decrease in microhardness was observed.When comparing the rolled samples to the unrolled samples,the tensile strength increased from 734MPa to 856MPa,with a slight reduction in elongation.关键词
电弧增材制造/原位热轧/低合金钢/微观组织/力学性能Key words
wire-arc additive manufacturing/in-situ rolling/high-strength low-alloy steel/microstructure/mechanical property引用本文复制引用
王锐,任杰,王义朋,祝弘滨,李红,ERIKA Hodúlová..原位热轧和热循环对电弧增材制造低合金钢微观组织和力学性能的影响[J].金属加工（热加工）,2025,(7):31-35,5.基金项目
中车集团重点科研项目(CIJS23-KJ011) （CIJS23-KJ011）
航空科学基金(2024M049075001). （2024M049075001）
