赵广迪,臧喜民,王博,孔令种,杨杰

• 1:辽宁科技大学材料与冶金学院
• 2:沈阳工业大学材料科学与工程学院

摘要(Abstract)：

随着海洋石油工业的深入开展和钻采难度的加大,齿条钢的厚度不断增大,对其淬透性提出了更高要求。B是提高淬透性的关键元素,以典型的ASTM A514Gr. Q齿条钢为研究对象,采用有限元模拟和端淬实验研究了B对其淬透性的影响。模拟结果表明:3种B含量齿条钢端淬试样的显微组织均由马氏体和贝氏体组成,添加0.0005 mass%B可显著提高齿条钢的淬透性,但当B含量提高至0.005 mass%时这种作用不再增强;不加B钢、0.0005 mass%B钢和0.005 mass%B钢的半马氏体点分别距淬火端约12、30和29 mm。端淬实验结果表明:对于不加B钢,淬火端的显微组织为板条马氏体+少量粒状贝氏体,远离淬火端时逐渐向全粒状贝氏体转变,洛氏硬度先迅速下降,后缓慢降低;添加0.0005 mass%B和0.005 mass%B均使齿条钢的淬透性明显增大,而它们的淬透性曲线特征和组织演变规律十分相近;这两种添加B钢的淬火端显微组织均为全板条马氏体,远离淬火端马氏体不断减少,转变为板条马氏体+粒状贝氏体的混合组织,洛氏硬度先小幅下降,后显著降低。3种B含量齿条钢端淬试样中的半马氏体点位置均与模拟结果吻合良好。总之,端淬实验结果验证了模拟结果的准确性。

关键词(KeyWords)： 齿条钢;硼;淬透性;数值模拟;组织演变

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金面上项目(52174317,52474362);; 辽宁省教育厅高校基本科研项目面上项目(JYTMS20230943)

作者(Author): 赵广迪,臧喜民,王博,孔令种,杨杰

DOI: 10.13289/j.issn.1009-6264.2024-0379

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