论文部分内容阅读
H13(4Cr5MoSiV1)钢作为一种热作模具钢,由于热强性及综合力学性能优于3Cr2W8V钢,已在我国广泛应用。它的常规热处理工艺是:淬火加两次高温回火,为提高表面硬度,有时结合最终回火进行氮碳共渗处理,表面硬度虽可达1000HV01,耐磨性和使用寿命仍较低。为了提高H13钢模具的耐磨性和使用寿命,我们对该钢进行了复合热处理实验。首先在预热期进行880℃×2h的无毒液体碳氮共渗[1～3]。然后放入980℃的氯基熔盐被覆炉中被覆TiC[2],经不同的时间保温后,取出淬油。处理后的试样进行表层显微组织检测,硬度结果较为理想。
H13 (4Cr5MoSiV1) steel, as a kind of hot work die steel, has been widely used in our country due to its thermal strength and mechanical properties superior to 3Cr2W8V steel. Its conventional heat treatment process is: quenching plus two high temperature tempering, in order to improve the surface hardness, sometimes combined with the final tempering nitrocarburizing treatment, although the surface hardness of up to 1000HV01, wear resistance and service life is still low. In order to improve the wear resistance and service life of H13 steel mold, we conducted a composite heat treatment experiment on the steel. The first non-toxic liquids at 880 ℃ × 2h carbonitriding [1 ~ 3] during the warm-up period. Then placed in 980 ℃ chlorine-based molten salt coated furnace covered TiC [2], after a different period of heat preservation, remove the quenching oil. The treated samples were examined by surface microstructure and the hardness results were satisfactory.