一、前言用热喷涂法在碳钢表面喷涂一层铝,然后进行扩散退火处理,当表面渗层含铝量达8%时,可有效地防止碳钢基体的高温氧化,但使用温度应在900℃以下。尽管获得渗铝层的方法有热浸铝、固体包装渗铝等,而热喷涂法操作方便、工艺简单、价格低廉、生产效率高。基体喷铝后,为了防止铝层在扩散退火过程中的氧化和流 I. Preface Spray a layer of aluminum on the surface of carbon steel by thermal spraying and then conduct diffusion annealing. When the aluminum content in the surface layer is up to 8%, it can effectively prevent the high temperature oxidation of carbon steel substrate, but the working temperature should be between Below 900 ℃. Although the method of obtaining aluminized layer is hot-dip aluminum, aluminized solid packaging, etc., and thermal spraying method easy to operate, simple process, low cost, high production efficiency. After the substrate is sprayed with aluminum, in order to prevent the oxidation and the flow of the aluminum layer during the diffusion annealing process