Hot-dipped Aluminizing on the HK40 Heat-resistant Steel

Zhang Yan; Xu Chuancheng; Pan Yu

doi:10.15980/j.tzzz.2014.05.031

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Hot-dipped Aluminizing on the HK40 Heat-resistant Steel
Vol. 34, Issue 5, Pages: 460-462(2014)
Published： 2014 ，
DOI： 10.15980/j.tzzz.2014.05.031

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[1]张炎,徐传成,潘宇.HK40耐热钢热浸镀Al工艺[J].特种铸造及有色合金,2014,34(05):460-462.

Zhang Yan, Xu Chuancheng, Pan Yu. Hot-dipped Aluminizing on the HK40 Heat-resistant Steel. [J]. Special Casting & Nonferrous Alloys 34(5):460-462(2014)
[1]张炎,徐传成,潘宇.HK40耐热钢热浸镀Al工艺[J].特种铸造及有色合金,2014,34(05):460-462. DOI： 10.15980/j.tzzz.2014.05.031.

Zhang Yan, Xu Chuancheng, Pan Yu. Hot-dipped Aluminizing on the HK40 Heat-resistant Steel. [J]. Special Casting & Nonferrous Alloys 34(5):460-462(2014) DOI： 10.15980/j.tzzz.2014.05.031.

摘要

研究了在浸镀Al液中加入Si和稀土对HK40耐热钢热浸镀Al层的影响。应用光学显微镜、扫描电镜等分析了镀层的微观组织和成分分布

应用X射线衍射仪分析了镀层的相结构

并对基体到镀层的不同区域进行了显微硬度测试。结果表明

Si和稀土的加入

使镀层变薄

表面更光滑

镀层和基体的结合更好

镀层组织中出现了较多的FeAl3和Fe2Al5相

大大提高了过渡层的显微硬度。

Abstract

Effects of Si and RE on the hot-dip aluminizing HK40heat-resistant steel were investigated.By means of optical microscope

scanning electron microscope and energy spectrum analysis

the microstructure and element distribution of coating were analyzed.The phase constitute of coating was investigated by X-ray diffraction

and the hardness testing was carried out at different zone from steel base to coating.The results show that the surface thickness of coating is decreased and exhibits more smoothly

meanwhile

the coating and the matrix are characterized by metallurgical bonding with the addition of Si and RE.More FeAl3and Fe2Al5phases appear in coating

and the micro-hardness of transient layer is improved largely.