摘要
推出了一种新的熔覆方法——高温涂料保护熔覆技术,方法是在钢的表面先预涂一层自熔性合金粉末和一层高温保护涂料,然后烘干,其后将试样放入高温电阻炉内加热,待试样加热至自熔性合金粉末的熔点后,将试样取出冷至室温,即可获得表面平整、组织致密、结合牢固的熔覆层。熔覆后的试样还可以进行正火处理,以改善基体的组织和性能。通过金相显微镜、XRD、SEM、EPMA和显微硬度计等分析仪器对熔覆层的组织结构和性能进行了分析研究。结果表明,熔覆层与基体的界面属于具有零稀释率特征的冶金结合。
A new cladding method under the protection of high temperature coating was introduced. Firstly, a layer of Stelite Ni60 alloy powder was prepared on the substrate steel and the alloy layer was covered with a layer of high temperature protective coating. After the sample was dried and heated to the melting point of Ni60 alloy powder in a high temperature resistance furnace, the sample was taken out of the furnace and cooled down. A uniform, adherent and firmly bonded clad coating can be obtained. The clad sample can be normalized to improve the microstructure and properties of matrix. The coating microstructures, compositions and microhardness were analyzed by OM, SEM, XRD, EPMA and microhardness tester. The experimental results show that the interface between the clad coating and matrix belongs to the metallurgical bond with the characteristic of zero rate of dilution.
出处
《焊接》
北大核心
2010年第6期27-30,共4页
Welding & Joining
关键词
零稀释率熔覆
Ni60自熔性合金粉末
高温保护涂层
冶金结合
cladding with zero rate of dilution
stellite Ni60 alloy powder
high temperature protective coating
metallurgical bonding
作者简介
赵程，1952年出生，硕士，教授，研究方向为金属材料表面改性处理，已发表论文80余篇，获专利二项。
