Structure analysis of aluminized coatings on P92 steel prepared by pack cementation aluminizing and vapor aluminizing

HUANG Jinyang; ZHONG Qiang; HUANG Haogang; LU Jintao; ZHANG Xingxing; YANG Zhen

doi:10.19666/j.rlfd.201909233

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Structure analysis of aluminized coatings on P92 steel prepared by pack cementation aluminizing and vapor aluminizing

更新时间：2025-09-28

- Structure analysis of aluminized coatings on P92 steel prepared by pack cementation aluminizing and vapor aluminizing
- Thermal Power Generation Vol. 49, Issue 3, Pages: 124-129(2020)
- 作者机构：
  
  1. 西安热工研究院有限公司
  2. 华能岳阳电厂
  3. 西安益通热工技术服务有限责任公司
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.201909233
  CLC： TG174.4
- Published：2020
- 稿件说明：
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HUANG Jinyang, ZHONG Qiang, HUANG Haogang, et al. Structure analysis of aluminized coatings on P92 steel prepared by pack cementation aluminizing and vapor aluminizing[J]. Thermal power generation, 2020, 49(3): 124-129.
DOI：

HUANG Jinyang, ZHONG Qiang, HUANG Haogang, et al. Structure analysis of aluminized coatings on P92 steel prepared by pack cementation aluminizing and vapor aluminizing[J]. Thermal power generation, 2020, 49(3): 124-129. DOI： 10.19666/j.rlfd.201909233.

摘要

对P92耐热钢在760℃下采用粉末包埋法和化学气相渗铝法进行渗铝实验

研究了渗铝涂层的组织结构和沉积特性。采用扫描电镜(SEM)、X射线衍射(XRD)以及能谱(EDS)等方法分析表征了渗铝涂层结构、成分及物相组成

对渗铝涂层沉积过程中的原子扩散机理进行了对比分析。结果表明:2种渗铝方式在760℃低温下均可在P92耐热钢表面形成铝化物涂层;粉末包埋渗铝涂层为3层结构

厚度约19μm

与基体结合良好

由外向内主要物相为Fe_2Al_5→FeAl→Fe_3Al

整体涂层铝质量分数约26.50%;化学气相渗铝涂层为单层结构

涂层内部出现铝原子富集

厚度约12μm

主要物相为Fe_3Al和富铝化合物

整体涂层铝质量分数约9.50%。

Abstract

The deposition characteristics of the aluminized coating prepared by pack cementation aluminizing and chemical vapor infiltration aluminizing about P92 heat-resistant steel at 760 ℃ were analyzed. SEM/EDS and XRD analysis were employed to characterize the structure

ingredient and phase composition. The diffusion behaviors of Al and Fe atoms were compared and discussed. The results show that

the aluminized coatings were successfully prepared on P92 heat-resistant steel using both pack cementation aluminizing and chemical vapor infiltration aluminizing. A three-layered aluminized coating

with thickness of 19 μm

was formed on P92 heatresistant steel and an excellent bonding was also obtained between the coating and the substrate by pack cementation method. The phase composition of the aluminized coating consisted of Fe2 Al5

FeAl

and Fe3 Al from the surface to inside. The mass fraction of Al in the whole coating was 26.5%. However

a single layered aluminized coating

with thickness of 12 μm

was prepared on P92 steel by chemical vapor infiltration aluminizing. The phase composition mainly consisted of Fe3 Al and Al-rich compounds. The mass fraction of Al in the single coating was about 9.5%.

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