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模具的最后性能取决于奥氏体晶粒的尺寸和碳化物相的形状、尺寸和分布。本文讨论了用特殊的两阶段热处理方法改善模具钢的组织及提高其性能的可能性。研究了用GCr15钢制造的冷镦模具经不同热处理工艺后的组织和性能。普通的热处理和两阶段热处理的原理如图1所示。两阶段热处理的准备阶段(预先热处理)是用比普通热处理略高的温
The final properties of the mold depend on the size of austenite grains and the shape, size and distribution of carbide phases. This article discusses the possibility of using a special two-stage heat treatment to improve die steel organization and improve its performance. The structure and properties of the cold heading die made of GCr15 steel after different heat treatment processes were studied. The principle of ordinary heat treatment and two-stage heat treatment is shown in FIG. 1. The preparation phase of the two-stage heat treatment (pre-heat treatment) is performed with slightly higher temperature than the ordinary heat treatment