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一、前言 18Cr2Ni4W A钢的淬透性好,可用来制造尺寸较大的高强度零件。淬火状态的18Cr2Ni4W A钢历经不同温度回火时将产生一系列的组织变化,从而导致力学性能的改变。对高强度钢而言,组织因素对疲劳性能的影响常常不同于它们对强度、塑性和韧性的影响,为了寻找既能充分发挥18Cr2Ni4W A钢的优良强韧配合,又能具有足够疲劳强度的热处理工艺,本文将对这种钢作为低碳马氏体型钢使用时的强度、塑性、韧性及疲劳特性作一客观的估价。
First, the preface 18Cr2Ni4W A hardenability of steel is good, can be used to manufacture larger parts of high strength. Quenched 18Cr2Ni4W A steel after tempering at different temperatures will produce a series of organizational changes, resulting in changes in mechanical properties. For high-strength steels, the effect of microstructure on fatigue properties is often different from their effect on strength, ductility and toughness. In order to find a way to maximize the strength and toughness of 18Cr2Ni4W A steel, Technology, this article will make an objective appraisal on the strength, ductility, toughness and fatigue properties of this kind of steel when it is used as low carbon martensitic steel.