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对经固溶处理的,含碳和镍量不同的两种18—8型奥氏体不锈钢进行从小到大,直至超过90%变形度的大变形量冷塑性变形,并配以300℃左右低温回火强化处理,研究其金相组织和力学性能变化。试验结果表明,形变诱发马氏体的产生符合镍当量规律,镍当量为22.65%的18—8型奥氏体不锈钢(称为Ⅱ型钢)在室温下形变能较明显地产生形变诱发马氏体;形变诱发马氏体量将随形交度加大而增加;形变诱发马氏体(a’)的产生对奥氏体不锈钢的形变强化作出了附加的贡献,不仅使钢获得高强度,而且具有优良的综合性能。目前已用于钢丝生产,对改进钢丝产品质量有显著效果。经鉴定,Φ0.5～1.20毫米规格的牙科用不锈钢丝的主要技术性能指标已达到英国ASH同类产品水平。
The two types of 18-8 austenitic stainless steels treated by solution treatment with different contents of carbon and nickel are subjected to cold deformation of large deformation up to 90% Tempering strengthening treatment, study of its microstructure and mechanical properties changes. The experimental results show that the deformation-induced martensite is in accordance with the law of nickel equivalent, and the 18-8 austenitic stainless steel with nickel equivalent of 22.65% (called as Ⅱ-type steel) can produce deformation-induced martensite obviously at room temperature ; The amount of deformation-induced martensite will increase with the increase of shape degree; deformation-induced martensite (a ’) produce additional contribution to the deformation strengthening of austenitic stainless steel, not only to obtain high strength steel, but also Has excellent overall performance. Has been used for steel production, to improve the quality of steel products have a significant effect. Identified, Φ0.5 ~ 1.20 mm specifications of stainless steel wire stainless steel main technical performance indicators have reached the level of similar products in the United Kingdom ASH.