硬质合金金相制样方法研究

Metallographic Preparation of Cemented Carbide

通过硬质合金金相观察的方法判断合金的组织结构,在指导新产品、新工艺的开发及生产品质控制具有重要作用。目前,金相制备方法主要分为硫磺镶嵌化学半机械金相制样法、融锡镶嵌机械金相制样法和酚醛树脂镶嵌全机械金相制样法三种不同方法。结合生产实践,详细对比了各方法的优缺点,并提出了金相制备过程对试样磨抛时间长短、加载力大小、磨抛转速与方向、抛光剂、润滑剂用量等方面的要求,提出有效消除制样过程中易形成假象和缺陷问题的方法。

Judging the alloy structure by the method of metallographic observation of cemented carbide is of great significance in guiding the development of new products and new processes and controlling production quality.At present,the metallographic preparation methods are mainly divided into three ways:sulfur mosaic chemistry,semi mechanical metallography,tin melting and mosaic machine,metallography and phenolic resin mosaic.On the basis of production practice,this paper analyzes the advantages and disadvantages of each method.The requirements of the process of Metallographic Preparation on the grinding time,loading force,speed and direction of grinding and polishing,the amount of polishing agent and the amount of lubricant are put forward.