激光熔覆SiC<sub>p</sub>/Ni35覆层热熔损性能研究

潘成刚; 曾汉荣; 丁紫正; 常庆明

doi:10.15980/j.tzzz.2018.01.001

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激光熔覆SiC_p/Ni35覆层热熔损性能研究
Corrosion Resistance of SiC_p/Ni35 Coating by Laser Cladding
2018年38卷第1期页码：1-4
纸质出版日期： 2018 ，
DOI： 10.15980/j.tzzz.2018.01.001

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[1]潘成刚,曾汉荣,丁紫正,常庆明.激光熔覆SiC_p/Ni35覆层热熔损性能研究[J].特种铸造及有色合金,2018,38(01):1-4.

Pan Chenggang, Zeng Hanrong, Ding Zizheng, et al. Corrosion Resistance of SiC_p/Ni35 Coating by Laser Cladding[J]. Special Casting & Nonferrous Alloys, 2018,38(1):1-4.
[1]潘成刚,曾汉荣,丁紫正,常庆明.激光熔覆SiC_p/Ni35覆层热熔损性能研究[J].特种铸造及有色合金,2018,38(01):1-4. DOI： 10.15980/j.tzzz.2018.01.001.

Pan Chenggang, Zeng Hanrong, Ding Zizheng, et al. Corrosion Resistance of SiC_p/Ni35 Coating by Laser Cladding[J]. Special Casting & Nonferrous Alloys, 2018,38(1):1-4. DOI： 10.15980/j.tzzz.2018.01.001.

摘要

通过激光熔覆工艺在H13钢表面制备了SiC

/Ni35

Ni@SiC

/Ni35和Cu@SiC

/Ni35复合覆层。对3种激光熔覆层在700℃进行2h铝液静态热熔损试验

测量试样的熔损质量。采用SEM-EDS观察和分析熔覆层的组织和成分

分析并研究SiC

/Ni35熔覆层在铝液中的腐蚀机理。结果表明

H13钢的熔损质量损失为熔覆层质量损失的16

3倍

各熔覆层熔损质量差别不大。熔覆层Al/Ni接触扩散偶新生相形核时间长

Al在熔覆层中扩散速度低导致熔覆层抵抗铝热熔损性能显著提高。

Abstract

The SiC

/Ni35

Ni@SiC

/Ni35 and Cu@SiC

/Ni35 composite coatings on H13 steel were prepared by laser cladding.Three kinds of coatings were immersed in molten aluminum for 2 hat 700℃to measure the melting losses of samples.The microstructure and phase constituent of corroded coatings were observed by SEM and EDS.The corrosion mechanism of the coating in molten aluminum was described.The results show that the melting loss of H13 steel is 16

3 times of that of three kinds of coatings

and the loss weight of the three coatings exhibits absence of apparent difference

which are attributed to the long nucleation time of new phase in Al/Ni contact diffusion couple and the low diffusion velocity of Al resulting in high anti-corrosion resistance of coating in molten aluminum.