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综述了国内外清洁弹簧钢生产技术的发展，论述了钢中夹杂物变性工艺和机制，并提出需要进一步研究的问题。
The development of the production technology of clean spring steel at home and abroad is reviewed. The technology and mechanism of the degeneration of inclusions in steel are discussed, and the problems that need further research are put forward.