一种提高马氏体不锈钢耐腐蚀性的方法

• Format: Patent
• Language: Chinese
• Published: 04.11.2022
• Subjects: CHEMISTRY; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS

本发明公开了一种提高马氏体不锈钢耐腐蚀性的方法，处理步骤如下：a.首先将马氏体不锈钢样品加热到奥氏体相区；b.待步骤a完成后，再将马氏体不锈钢样品通过热机械处理引入一定的变形,并控制压下量在0-30％，利用奥氏体相变这一中间过程实现马氏体不锈钢样品的原奥氏体晶界结构的调控；c.待步骤b完成后，再将调控后的马氏体不锈钢样品进行淬火配分；d.待步骤c完成后，再将淬火分配后的马氏体不锈钢样品进行回火处理。本发明通过奥氏体相区形变热处理与淬火配分回火工艺协同处理，克服马氏体为体心立方结构，具有较高的层错能，不容易发生低能特殊晶界的增殖，晶界结构调控难度大的问题,优化晶界特征分布，提高马氏体不锈钢中残余奥氏体含量，改善马氏体不锈钢耐腐蚀性。 The invention discloses a method for improving corrosion resistance of martensitic stainless steel. The method comprises the following treatment steps: a, firstly, heating a martensitic stainless steel sample to an austenite phase region; b, after the step a is completed, enabling the martensitic stainless steel sample to be subjected to thermal mechanical treatment to introduce certain deformation, controlling the rolling reduction to be 0-30%, and regulating and controlling the original austenite grain boundary structure of the martensitic stainless steel sample through the intermediate process of austenite phase transformation; c, after the step b is completed, conducting quenching partition