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目前,轻工行业还有许多单位采用剧毒的液体氰化工艺,因此,有必要进行用低碳马氏体强化取代液体氰化的研究。如自行车中轴等零件,用低碳马氏体淬火,其淬透性和扭转疲劳强度等,能满足自行车使用的要求[1]。关键在于表面硬度和耐磨性。自行车中轴和轴碗等零件的耐磨性,要求在轴向压力200kgf、转动速度2000r/min、转动时间30min条件下,轴颈或轴碗表面不出现凹陷、沟槽或剥落等缺陷。低碳马氏体强化零件的表面硬度一般在HRC36～48,液
At present, there are many units in the light industry that use the highly toxic liquid cyanide process. Therefore, it is necessary to carry out the research of replacing the liquid cyanide with the enhanced carbon martensite. Such as bicycle shafts and other parts, with low-carbon martensitic quenching, and its hardenability and torsion fatigue strength, to meet the requirements of bicycle use [1]. The key is the surface hardness and wear resistance. The wear resistance of the parts such as the bicycle axle and the shaft bowl requires that no defects such as depression, groove or spalling occur on the surface of the journal or the shaft bowl under the conditions of an axial pressure of 200kgf, a rotating speed of 2000r / min and a rotating time of 30min. Low-carbon martensite strengthened parts of the surface hardness is generally HRC36 ~ 48, liquid