Study on the mechanism of titanium improving the hot ductility of peritectic microalloyed steels in brittle zone III

IF 1.3 4区材料科学 Q3 METALLURGY & METALLURGICAL ENGINEERING

International Journal of Cast Metals Research Pub Date : 2021-11-02 DOI:10.1080/13640461.2021.2011655

Xiaogang Yang, L. Xie, Chao-bin Lai, Diqiang Luo

{"title":"Study on the mechanism of titanium improving the hot ductility of peritectic microalloyed steels in brittle zone III","authors":"Xiaogang Yang, L. Xie, Chao-bin Lai, Diqiang Luo","doi":"10.1080/13640461.2021.2011655","DOIUrl":null,"url":null,"abstract":"ABSTRACT In the current article, the influence of titanium on the hot ductility of peritectic-microalloyed steels, in the temperature range 600°C to 950°C, was investigated by tensile testing. The morphology of the fracture and the behaviour of precipitates, inclusions and microstructures near the fracture surface were observed and discussed. It was found that within the test temperature range, the reduction in area values of titanium-bearing steels were almost greater than 40%, which were much larger than those of titanium-free steels. This improvement was due to the formation of (TixNb1-x)(CyN1-y) precipitates and titanium-aluminium oxides with high titanium content that could act as the nucleation sites for dimples to promote the occurrence of ductile fracture. In addition, the austenite grain was refined and more uniform in size. The thickness together with the maintain temperature range of the ferrite films which distribute only along austenite grain boundaries were reduced.","PeriodicalId":13939,"journal":{"name":"International Journal of Cast Metals Research","volume":"34 1","pages":"151 - 161"},"PeriodicalIF":1.3000,"publicationDate":"2021-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Cast Metals Research","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1080/13640461.2021.2011655","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"METALLURGY & METALLURGICAL ENGINEERING","Score":null,"Total":0}

引用次数: 1

Abstract

ABSTRACT In the current article, the influence of titanium on the hot ductility of peritectic-microalloyed steels, in the temperature range 600°C to 950°C, was investigated by tensile testing. The morphology of the fracture and the behaviour of precipitates, inclusions and microstructures near the fracture surface were observed and discussed. It was found that within the test temperature range, the reduction in area values of titanium-bearing steels were almost greater than 40%, which were much larger than those of titanium-free steels. This improvement was due to the formation of (TixNb1-x)(CyN1-y) precipitates and titanium-aluminium oxides with high titanium content that could act as the nucleation sites for dimples to promote the occurrence of ductile fracture. In addition, the austenite grain was refined and more uniform in size. The thickness together with the maintain temperature range of the ferrite films which distribute only along austenite grain boundaries were reduced.

查看原文本刊更多论文

钛提高包晶微合金钢脆区热延性的机理研究

摘要本文通过拉伸试验研究了钛对包晶微合金钢在600°C至950°C温度范围内的热塑性的影响。观察和讨论了断口的形貌以及断口附近沉淀物、夹杂物和微观结构的行为。研究发现，在试验温度范围内，含钛钢的面积折减率几乎大于40%，远大于无钛钢。这种改进是由于形成了（TixNb1-x）（CyN1-y）沉淀物和具有高钛含量的钛铝氧化物，它们可以作为凹坑的成核位点，以促进韧性断裂的发生。此外，奥氏体晶粒细化，尺寸更加均匀。降低了仅沿奥氏体晶界分布的铁氧体膜的厚度和维持温度范围。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

International Journal of Cast Metals Research 工程技术-冶金工程

CiteScore

2.70

自引率

7.10%

发文量

审稿时长

7.5 months

期刊介绍： The International Journal of Cast Metals Research is devoted to the dissemination of peer reviewed information on the science and engineering of cast metals, solidification and casting processes. Assured production of high integrity castings requires an integrated approach that optimises casting, mould and gating design; mould materials and binders; alloy composition and microstructure; metal melting, modification and handling; dimensional control; and finishing and post-treatment of the casting. The Journal reports advances in both the fundamental science and materials and production engineering contributing to the successful manufacture of fit for purpose castings.