一种新型曲轴感应淬火技术的研究

Study of a New Type of Crankshaft Induction Hardening Technology

在传统SHarP-c曲轴感应淬火技术的基础上,以某汽车四缸机B15T曲轴淬火工艺为例,提出了优化的曲轴感应淬火+回火工艺。测量了曲轴感应淬火/回火后的表面硬度、淬硬层深度以及宽度。结果表明,淬火后表面硬度最大偏差1.7 HRC,上、下止点硬化层深度最大偏差0.07 mm,上、下止点淬火宽度最大相差0.3 mm;淬火前后的变形量不到0.1 mm;淬火和回火共用时29 s,显著提高了曲轴淬火生产效率。

On the basis of traditional SHarP-c crankshaft induction quenching technology, taking the B15 T crankshaft quenching process of a car four cylinder engine as an example, an optimized crankshaft induction hardening/tempering process was proposed. Surface hardness, depth and width of hardened layer in the crankshaft after the induction quenching and tempering were measured. The results show that maximum deviation of surface hardness after quenching is 1.7 HRC, the maximum deviation of the depth of the upper and lower dead point hardening layer is 0.07 mm, and the maximum difference of quenching width between upper and lower stop is 0.3 mm; the amount of deformation before and after quenching is less than0.1 mm; the time of quenching and tempering is 29 s, which obviously improves the crankshaft quenching production efficiency.