CAJ | 학술논문

铸辗复合成形工艺是生产环形零件的先进成形技术，具有高效短流程、节能节材和减少排放等显著优点。对铸态环坯材料在成形工艺条件下的组织演变机理和变形热力学条件进行深入的研究，对于实现材料在这种短流程中的组织改善和成形成性一体化调控，具有重要意义。分析研究材料在热变形条件下热物理性能参数和建立准确的材料模型，是分析研究材料热成形过程组织演变和实现成形成性一体化调控的前提和关键。针对轴承套圈铸辗复合成形工艺，以42CrMo钢为研究对象，通过数值模拟和试验研究，得到热变性条件下铸态42CrMo钢的热物性参数如热导率、比热容和热扩散系数及其变化规律，分析影响这些热物性参数变化的因素，可为分析42CrMo环件铸辗复合成形工艺和实现成形过程中组织和性能的改善提供准确的数据和模型。
주전복합성형공예시생산배형령건적선진성형기술，구유고효단류정、절능절재화감소배방등현저우점。대주태배배재료재성형공예조건하적조직연변궤리화변형열역학조건진행심입적연구，대우실현재료재저충단류정중적조직개선화성형성성일체화조공，구유중요의의。분석연구재료재열변형조건하열물이성능삼수화건립준학적재료모형，시분석연구재료열성형과정조직연변화실현성형성성일체화조공적전제화관건。침대축승투권주전복합성형공예，이42CrMo강위연구대상，통과수치모의화시험연구，득도열변성조건하주태42CrMo강적열물성삼수여열도솔、비열용화열확산계수급기변화규률，분석영향저사열물성삼수변화적인소，가위분석42CrMo배건주전복합성형공예화실현성형과정중조직화성능적개선제공준학적수거화모형。
Cast-rolling forming technology is a new technology to produce ring parts. It possesses many advantages such as high efficiency, short process, saving energy and materials and reducing pollution. In order to get better microstructure and mechanical properties in this new process it is very important to study the microstructure evolution mechanism and deformation thermodynamic conditions of casting materials. To investigate thermal-physical characteristics of materials under hot forming and establish accurate model is key and premise for analyzing microstructure evolution of materials and realizing the controlling of organization and mechanical properties. Aiming at the cast-rolling forming technology of bearing rings, the thermal-physical characteristics of casting 42CrMo such as thermal conductivity, specific heat and thermal diffusivity under hot forming are researched by means of numerical simulation and experiments. The variations with temperature of these parameters are achieved. The factors influencing the changes of these parameters are analyzed. The obtained results can provide accurate data and model for analyzing cast-rolling forming technology of 42CrMo steel rings and getting better microstructure and mechanical properties.