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在日本，冷藏库和空气调节器冷冻机用压缩机壳体已经使用延性良好的热轧钢板，具有深冲性能，从零部件加工可靠性出发，要求薄钢板应具有良好的耐二次加工脆性。所谓耐二次加工脆性，是在进行过一次加工的材料在接受二次冲击力时不产生脆性现象。为了保护地球环境，作为冷冻机
In Japan, refrigerator housings and air conditioner freezer compressor housings have been used ductile hot-rolled steel sheet with deep drawing properties, starting from the parts processing reliability, the requirements of the steel sheet should have good resistance to secondary processing brittleness . The so-called resistance to secondary processing brittleness, is carried out once the processing of materials in the secondary impact force does not produce brittle phenomenon. In order to protect the Earth’s environment, as a freezer