Effect of laser quenching on salt spray corrosion and electrochemical corrosion of boronized layer on Cr12MoV steel

被引：0

作者：

Xie C. ^{[1
]}

Kong D. ^{[1
,2
]}

机构：

[1] School of Mechanical Engineering, Changzhou University, Changzhou

[2] Jiangsu Key Laboratory of Materials Surface Science and Technology, Changzhou University, Changzhou

来源：

Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2016年 / 47卷 / 08期

关键词：

Boronized layer; Cr12MoV; Electrochemical corrosion; Laser quenching; Salt spray corrosion;

D O I：

10.11817/j.issn.1672-7207.2016.08.011

中图分类号：

学科分类号：

摘要：

The boronized layer was prepared on the surface of C12MoV cold work die steel with hot-dipped boron, quenched by a CO2 laser. The morphologies, compositions of chemical elements and phases of the sample surfaces before and after salt spray corrosion were analyzed with SEM, EDS and XRD, respectively, and the salt spray corrosion properties of boronized layer before and after laser quenching were investigated. The corrosion potential, current density and corrosion rate before and after laser quenching were tested with electrochemical workstation, and the mechanism of laser quenching effect on electrochemical corrosion was discussed. The results show that pores exist on the surface of boronized layer, and the defects can be removed by laser quenching. After salt spray corrosion, the crevice corrosion is mainly produced in the boronized layer with main corrosion products of γ-FeO(OH) and Fe3O4, the laser quenched surface exhibits only tiny pits and slight cracks, and the passivation film is composed of Fe3O4 and α-FeO(OH). Compared with the boronized sample, the corrosion potential of laser quenched sample is nearly unchanged, but the corrosive current density decreases by 11%, showing that laser quenching can significantly improve corrosion resistance of the boronized layer. © 2016, Central South University Press. All right reserved.

引用

页码：2614 / 2620

页数：6

共 18 条

[1] Pang G.X., Li Z.L., Chen Z.Y., Research on ion nitriding temperature effect on wear resistance of Cr12MoV steel, Physics Procedia, 50, 50, pp. 120-123, (2013)
[2] Kong D., Zhou C., Long D., Et al., The surface morphologies and spectroscopy analysis of VC coatings on the substrate of Cr12MoV prepared by TD process after salt spray, Journal of Wuhan University of Technology (Materials Science Edition), 27, 4, pp. 628-633, (2012)
[3] Kang M.C., Kim K.H., Shin S.H., Et al., Effect of the minimum quantity lubrication in high-speed end-milling of AISI D2 cold-worked die steel (62 HRC) by coated carbide tools, Surface and Coatings Technology, 202, 22-23, pp. 5621-5624, (2008)
[4] Wang B., Xue W., Jin X., Et al., Plasma electrolytic borocarburizing treatment on Q235 low carbon steel and its properties, Journal of Materials Engineering, 42, 6, (2014)
[5] Yang H., Wu X., Yang Z., Et al., Enhanced boronizing kinetics of alloy steel assisted by surface mechanical attrition treatment, Journal of Alloys and Compounds, 590, 5, pp. 388-395, (2014)
[6] Sahin S., Meric C., Saritas S., Production of ferroboron powders by solid boronizing method, Advanced Powder Technology, 21, 4, pp. 483-487, (2010)
[7] George K.K., Grigoris E.K., Dimtrios N.T., Et al., Corrosion behavior of borided AISI H13 hot work steel, Surface and Coatings Technology, 201, 1-2, pp. 19-24, (2006)
[8] Wang H., Zhao Y., Yuan X., Et al., Effects of boronizing treatment on corrosion resistance of 65Mn steel in two acid mediums, Physics Procedia, 50, 1, pp. 124-130, (2013)
[9] Jia B., He Y., Tang Y., Et al., New technique of pack boronizing of Titanium, Journal of Central South University (Science and Technology), 36, 2, pp. 179-182, (2005)
[10] Kulk M., Makuch N., Dziarski P., Et al., Microstructure and properties of laser-borided composite layers formed on commercially pure titanium, Optics & Laser Technology, 56, 3, pp. 409-424, (2014)

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