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为了防止在淬火中形成裂纹,所用的淬火介质应使工件在马氏体转变温度区不出现大的组织应力。采用5% 4水溶液,(水溶性塑料液)可以降低在马氏体转变区的冷却速度。水溶性塑料具有比水高的粘度,并可在工件表面形成导热性差的塑料薄膜。热处理时用强度为15～20千奥斯特的外加稳定磁场能明显地改变结构钢和某些工具钢以及铸铁的亚结构和性能。已经确定,在
In order to prevent the formation of cracks in the quenching, quenching medium used should make the workpiece in the martensitic transformation temperature zone does not appear large organizational stress. 5% 4 aqueous solution, (water-soluble plastic solution) can reduce the cooling rate in the martensitic transformation zone. Water-soluble plastic has a higher viscosity than water and can form a plastic film with poor thermal conductivity on the surface of the workpiece. Heat treatment with an intensity of 15 to 20 kilos Oersted additional stable magnetic field can significantly change the structural steel and some tool steel and cast iron substructure and properties. Already confirmed