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我厂生产钢门窗型钢的冲裁模采用高铬钢Cr12。以前热处理外加工质量甚差,有的模子冲裁不到二小时就崩碎、断裂,查其原因,知道HRC58～60左右。为此厂部下决心增添二台箱式炉设备。经过一段时间摸索,模具质量大大提高,冲裁次数成倍增加,扭转了热处理质量差的环节。现将工艺摘录介绍如下: Cr12属高铬高碳钢,它的优点淬透性大,变形小,抗磨性高,具有高的硬度和足够的韧性。但导热性较差,合金元素扩散较慢(这也是我厂采用箱式炉淬火的原因)。
I plant the production of steel doors and windows punching die with high-chromium steel Cr12. Before the quality of heat treatment is very poor, and some mold blanking less than two hours collapse, fracture, check the reason, know HRC58 ~ 60 or so. For this factory department determined to add two box-type furnace equipment. After a period of time to explore, greatly improve the quality of the mold, the number of punching doubled, reversing the heat treatment of poor quality links. Process excerpts are introduced below: Cr12 is a high-chromium high-carbon steel, its advantages of hardenability, deformation, high abrasion resistance, high hardness and sufficient toughness. However, the thermal conductivity is poor, the diffusion of alloying elements is slow (this is why I use box furnace quenching).