Evolution of MnS inclusions in Ti-bearing X80 pipeline steel

IF 3.1 2区 材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING
Ze-an Lv , Hong-wei Ni , Hua Zhang , Cheng-song Liu
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引用次数: 9

Abstract

Studies show that manganese sulfide (MnS) inclusions in pipeline steel affect the lateral performance of steel in its rolling deformation, as well as the hydrogen-induced cracking and sulfide stress corrosion cracking resistance performance. To inhibit the precipitation of MnS and its effect on pipeline steel, a quenching experiment and a diffusion couple experiment, which investigated the evolution of MnS inclusions in Ti-bearing X80 pipeline steel, were conducted. The experimental results show that the transformation of the MnS inclusions during solidification is as follows: MnS→ titanium sulfide (TiS) → Ti4C2S2. The transition temperatures of MnS to TiS and TiS to Ti4C2S2 are 1673 and 1273 K, respectively, and the overall size of the sulfide decreased as well. Thermodynamic calculation results confirm that the transition temperatures of MnS to TiS and TiS to Ti4C2S2 are 1623 and 1203 K, respectively. When the sulfur content in the X80 pipeline steel is 0.0015%, all the sulfur in the steel can be converted into Ti4C2S2 with a titanium content of more than 0.02%.

含ti X80管线钢中MnS夹杂物的演变
研究表明,管道钢中硫化锰夹杂物影响钢在轧制变形过程中的横向性能,以及钢的氢致开裂和抗硫化物应力腐蚀开裂性能。为了抑制MnS的析出及其对管道钢的影响,进行了淬火实验和扩散偶联实验,研究了含ti X80管道钢中MnS夹杂物的演变规律。实验结果表明,MnS夹杂物在凝固过程中的转变为:MnS→硫化钛(ti)→Ti4C2S2。MnS到ti和ti到Ti4C2S2的转变温度分别为1673 K和1273 K,硫化物的总体尺寸也减小了。热力学计算结果表明,MnS向ti和ti向Ti4C2S2的转变温度分别为1623 K和1203 K。当X80管线钢中硫含量为0.0015%时,钢中的硫全部转化为钛含量大于0.02%的Ti4C2S2。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
4.30
自引率
0.00%
发文量
2879
审稿时长
3.0 months
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