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我厂生产的190和4135柴油机球铁曲轴,原只采用正火回火工艺,用户反映硬度低,耐磨性差。为了提高农机配件质量,大家经过试验、讨论、研究,制订了新的热处理工艺:在原来正火的基础上,辅以表面高频淬火。经处理后的曲轴,磨损位置的表面硬度从HRC18～30,普遍提高到50～58。经用户使用证明,使用寿命比原来提高一倍以上,效果十分显著。
I produced 190 and 4135 diesel engine ductile iron crankshaft, the original only normalized tempering process, the user reflects the low hardness, poor wear resistance. In order to improve the quality of agricultural machinery parts, we have tested, discussed, studied, developed a new heat treatment process: On the basis of the original normalized, supplemented by surface induction hardening. After treatment of the crankshaft, wear the surface hardness of the site from HRC18 ~ 30, generally increased to 50 ~ 58. Proved by the user, the service life more than double the original, the effect is very significant.