Diamond abrasive paste: a powerful assistant for processing superhard materials

In the field of superhard material processing, diamond grinding paste is an indispensable tool. It is a soft abrasive tool made of diamond micropowder abrasives and paste-like binders, and can also be called loose abrasive tools. Used for grinding hard and brittle materials to obtain a high surface finish. So, what exactly is diamond abrasive paste? How does it work? Let’s find out together.

Definition and working principle

Diamond grinding paste is made of diamond powder abrasives and paste-like binders. Among them, diamond micropowder is the main body, and they are bonded together by abrasives to form a paste. Diamond particles are super-hard materials with extremely high hardness and wear resistance. The paste-like binder has a good lubrication effect. During the grinding process, the diamond particles inside the grinding paste continue to roll, producing two types of extrusion and cutting. The action causes a large number of indentations on the surface of the workpiece, and the raised indentations are cut by subsequent abrasive grains, and the grinding chips are continuously formed and removed, thereby making the surface of the workpiece flat and smooth. At the same time, the abrasive can hold the diamond particles together to form a paste that is easy to use and control. During use, diamond abrasive paste usually needs to be operated with a grinder or manual grinding. Mainly used for polishing and grinding hard and brittle materials.

Let’s look at a practical application example below. Suppose there is a piece of cemented carbide that needs to be processed, and we use diamond abrasive paste to process it. First, we apply diamond abrasive paste to the carbide surface, and then use a grinder to polish it. During the grinding process, the diamond particles continuously scrape and grind the carbide surface, making it gradually smooth and flat. At the same time, the abrasive binds the diamond particles firmly together, ensuring the uniformity and stability of the polishing effect. After a few minutes of grinding, the carbide surface exhibits high-quality finish and flatness, and the processing efficiency and quality are significantly improved.

Abrasive paste classification

1. Classification according to solvent type

Diamond abrasive paste is divided into oil-soluble abrasive paste and water-soluble abrasive paste according to the type of abrasive paste binder.

Oil-soluble grinding paste is composed of grease, stearic acid, and some auxiliary materials. It has good wettability, strong grinding force, and low grinding heat. It is mainly used for processing cemented carbide and its parts, instruments, and measuring tools with high smoothness requirements. , cutting tools, grinding tools, etc.

Water-soluble grinding paste is composed of some alcohols and some auxiliary materials. It has low viscosity, is easy to cut, has high processing efficiency, is not corrosive to metals, and can be used in harsh grinding environments. It is mainly used for processing metals, circuit boards, glass, products made of hard and brittle materials such as ceramics, gemstones, agate, etc.

2. Different classifications according to the type of micropowder used

According to the different diamond powder used, it can be divided into polycrystalline diamond grinding paste and single crystal diamond grinding paste.

Selection of diamond grinding paste

The selection of diamond abrasive paste is mainly determined based on the finish requirements and processing efficiency of the workpiece as well as the original finish of the workpiece. If the margin is large and high processing efficiency is required, a coarser grain size can be selected; if the margin is small and a high smoothness is required, a finer grain size can be selected.

Main application scenarios of diamond abrasive paste

In the field of mechanical processing, diamond abrasive paste is widely used in the processing of various super-hard materials. It is suitable for measuring tools, cutting tools, optical instruments and other high-finish workpieces made of high-hardness materials such as glass, ceramics, gems, and cemented carbide. Grinding and polishing processing. It is also suitable for special-shaped workpieces made of the above materials that are difficult to process with grinding wheel tools. It can effectively improve processing efficiency and quality, reduce tool wear and reduce costs.

In the construction industry, diamond abrasive paste is used for processing and polishing stone, glass and other materials, producing smooth surfaces and high-quality finished products.

Diamond abrasive paste is also used for grinding and polishing of tungsten steel molds, optical molds, injection molds, etc.; grinding and polishing during metallographic analysis experiments; grinding and polishing of dental materials (dentures).

Diamond abrasive paste is a very practical tool that plays an important role in the processing of super-hard materials. By understanding the basic concepts, characteristics, application scenarios and working principles of diamond abrasive paste, we can better understand and utilize this tool and improve processing efficiency and quality.