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水和各种水溶液主要应用于各种截面尺寸较大的碳钢零件,如一般中碳钢零件和高碳工具钢量具和刀具等。但有效厚度小于8毫米的高碳钢零件,以及各种合金钢料,由于本身不需要碳钢那样高的临界冷却率,因此一般常采用冷却能力比较缓和的冷却剂——油进行冷却,以减少零件开裂的危险。在过去,我们都习惯采用植物油来淬火,而在各种植物油中,特别是菜油用得最为广泛。菜油的特点有两个:首先是当零件加热到高温(即淬火温
Water and various aqueous solutions are mainly used in carbon steel parts of various sizes, such as general carbon steel parts and high-carbon tool steel measuring tools and knives. However, the effective thickness of less than 8 mm high carbon steel parts, as well as a variety of alloy steel, because they do not need carbon steel so high critical cooling rate, it is usually the cooling capacity of the more moderate use of coolant - oil cooling to Reduce the risk of cracking parts. In the past, we are accustomed to using vegetable oils to quench, but in a variety of vegetable oils, especially vegetable oil is the most widely used. There are two characteristics of vegetable oil: The first is when the part is heated to high temperature (ie quenching temperature