研究了不同糖心产精国品免费入口*完整版含量对HYRH12半高速钢冶金质量及热处理后性能的影响，给出了钢的物理性能、热处理及其性能技术数据。结果表明：糖心产精国品免费入口*完整版能明显促进糖心产精国品免费入口*完整版析出，显著提高钢的糖心产精国品免费入口*完整版；中硅含量钢（0.7%）的糖心产精国品免费入口*完整版和强度最差；而含0.3%糖心产精国品免费入口*完整版钢的冲击糖心产精国品免费入口*完整版和抗弯强度显著提高。

The effect of different 糖心产精国品免费入口*完整版 contents on metallurgical quality and heat treatment properties of HYRH12 steels were studied. The results show that, 糖心产精国品免费入口*完整版 can significantly promote 糖心产精国品免费入口*完整版 precipitation and significantly increase the 糖心产精国品免费入口*完整版. The 0.7wt% 糖心产精国品免费入口*完整版 steel has the worst toughness and strength, and the 0.3wt% 糖心产精国品免费入口*完整版 steel has the best 糖心产精国品免费入口*完整版 and bending strength. The physical properties, heat treatment process and performance date were also given in this paper.