当前位置: X-MOL 学术Acta Metall. Sin. (Engl. Lett.) › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Effect of Interlayers on Microstructure and Properties of 2205/Q235B Duplex Stainless Steel Clad Plate
Acta Metallurgica Sinica-English Letters ( IF 3.5 ) Pub Date : 2019-12-18 , DOI: 10.1007/s40195-019-00985-1
Fengqiang Xiao , Dongpo Wang , Wenbin Hu , Lei Cui , Zhiming Gao , Lanju Zhou

In this research, 2205/Q235B clad plates were prepared by a vacuum hot rolling composite process. The effects of adding Fe, Ni, and Nb interlayers on the bonding interface structures and the shear strengths of the clad steel plates were studied. The results showed that 2205 duplex stainless steel and the three interlayers produced a large amount of plastic deformation and low-angle boundaries, and the main structures were the recrystallized and deformed grains. There were many recrystallized grains in the microstructure of the Q235B low-carbon steel due to the low deformation in the rolling process. The Fe interlayer had better wettability with the two kinds of steel, but the lower strength led to the reduction of shear strength by about 14 MPa compared with the original clad steel plate. The C element in the Q235B low-carbon steel easily diffused into the Fe interlayer, and the clad steel plate attained a poor corrosion resistance because a large decarburization area was formed. The Nb interlayer reacted with the Mo element in the 2205 duplex stainless steel to form an Nb–Mo binary alloy, which generated long-banded ferrite. The decarburization area was also produced because the Nb reacted with the C element in the Q235B to form hard and brittle NbCx. As a result, the shear strength was significantly reduced by about 282 MPa, and the corrosion resistance of the bonding surface was deteriorated. The Ni interlayer did not react with the alloy elements in both sides, and therefore effectively prevented element diffusion and improved the corrosion resistance of the bonding surface. Due to the low strength of the Ni interlayer and the increased number of bonding surfaces of the clad steel plates, the shear strength was reduced to some extent (about 40 MPa), but it still met the engineering application standards.

中文翻译:

中间层对2205 / Q235B双相不锈钢复合板组织和性能的影响

在这项研究中,通过真空热轧复合工艺制备了2205 / Q235B复合板。研究了添加Fe,Ni和Nb中间层对键合界面结构和复合钢板剪切强度的影响。结果表明,2205双相不锈钢和三个中间层产生大量塑性变形和低角度边界,其主要组织为再结晶和变形晶粒。由于轧制过程中的低变形,Q235B低碳钢的显微组织中有许多重结晶晶粒。Fe夹层对这两种钢具有更好的润湿性,但较低的强度导致与原始复合钢板相比剪切强度降低了约14 MPa。Q235B低碳钢中的C元素容易扩散到Fe中间层中,并且由于形成了较大的脱碳面积,因此复合钢板的耐蚀性差。Nb中间层与2205双相不锈钢中的Mo元素反应形成Nb-Mo二元合金,生成长带状铁素体。由于Nb与Q235B中的C元素反应形成硬而脆的NbC,因此也产生了脱碳区X。结果,剪切强度显着降低了约282MPa,并且接合表面的耐腐蚀性劣化。Ni中间层不与两侧的合金元素反应,因此有效地防止了元素扩散并提高了接合表面的耐腐蚀性。由于Ni夹层强度低以及复合钢板的结合面数量增加,剪切强度有所降低(约40 MPa),但仍满足工程应用标准。
更新日期:2019-12-18
down
wechat
bug