碳氮化物析出行为对钒微合金化套管钢屈服强度的影响  

Influence of Carbonitride Precipitation on Yield Strength of Vanadium Micro-alloyed Casing Steels

作　　者：扈立 张旭 HU Li;ZHANG Xu(Tianjin Pipe Co.,Ltd.,Tianjin 300301,China)

机构地区：[1]天津钢管制造有限公司,天津300301

出　　处：《钢管》2024年第1期35-39,共5页Steel Pipe

摘　　要：钒微合金化套管钢调质处理后的屈服强度对回火温度有较高的敏感性。研究了碳氮化物析出行为对钒微合金化套管屈服强度的影响。分析了钒微合金化的作用与N含量的关系,研究了VN和VC的析出行为以及析出相的强化作用。分析认为:V含量与材料热处理后的强度波动存在近似定量关系,V含量每增加0.03%,在回火温度变化10℃时将产生3~4 MPa的附加屈服强度波动。因此,可据此对钒微合金化钢种进行成分优化设计和产品性能控制,以增加实际生产中套管强度指标的稳定性。The yield strength of the vanadium micro-alloyed casing has rather high sensibility to the tempering temperature.Studied here in the essay is the influence by the carbonitride precipitation behavior on the yield strength of the vanadium micro-alloyed casing.The relevance between the effect of the vanadium micro-alloying and the Nb content is analyzed,and the VN and VC precipitation behaviors,and the strengthening effect of the precipitated phase are studied.It is regarded via the analysis that there exists an approximate quantitative relationship between the V content and the strength fluctuation of the materials as heat treated,i.e.,each time when the tempering temperature changes with 10℃,a 3~4 MPa additional yield strength fluctuation occurs as a result of 0.03%increasment in V content.Accordingly in actual production,the stability of the casing strength is expected to be improved by means of optimizing the chemical composition design of the vanadium micro-alloyed steel types and properly controlling the product properties.

关 键 词：套管 热处理 屈服强度 钒微合金化 碳氮化物 析出行为 

分 类 号：TG142.1[一般工业技术—材料科学与工程]