论文部分内容阅读
采用自主开发的材料体系对5CrMnMo钢堆焊层表面进行了激光合金化处理。研究了堆焊层激光合金化处理后的组织和显微硬度。在优化的工艺参数下,获得了表面光洁、与基材形成良好冶金结合的强化层。合金化层平均硬度HV750。应用于热锻模具,斯太尔曲轴切边模寿命提高了60%。研究与生产应用表明,激光制备的原位合成颗粒增强表层微观结构和激光合金化层-堆焊层-5CrMnMo钢基材形成连续的宏观梯度组织结构,是模具服役寿命提高的关键因素。
The surface of 5CrMnMo steel surfacing layer was laser alloyed by self-developed material system. The microstructure and microhardness of the overlay after laser alloying were studied. Under the optimized process parameters, a strengthened layer with smooth surface and good metallurgical bond with the substrate was obtained. Alloying layer average hardness HV750. Used in hot forging die, Steyr crankshaft trimming die life increased by 60%. The research and production applications show that the microstructure of laser-enhanced in situ synthesized particle reinforced microstructure and the laser alloyed layer-5CrMnMo steel surfacing layer form a continuous macroscopic gradient structure, which is the key factor to improve the service life of the mold.