How should one select the appropriate grinding wheel for workpieces made of different materials?

The abrasive material, grit size, and hardness of grinding wheels directly determine grinding performance. Selection must be tailored to the material properties of the workpiece, categorized as follows:

1. For grinding low-hardness metals like carbon steel, cast iron, and ordinary steel, brown fused alumina grinding wheels are the preferred choice. Brown fused alumina abrasives offer moderate hardness, good toughness, and affordability. Their versatility meets routine grinding, rust removal, and cutting needs while resisting excessive wear.

2. For grinding high-hardness, high-toughness metals like stainless steel, alloy steel, and high-speed steel, white fused alumina or chromium fused alumina grinding wheels are recommended. White fused alumina abrasives boast high purity and superior hardness, delivering strong cutting power while minimizing metal adhesion to prevent wheel clogging. Chromium fused alumina offers greater toughness than white fused alumina, making it suitable for grinding operations requiring high surface finish quality.

3. For grinding super-hard non-metallic or alloy materials like cemented carbide, ceramics, glass, and stone, diamond grinding wheels are essential. Diamond abrasives possess extremely high hardness—several times that of conventional abrasives—enabling effortless cutting of super-hard materials. They also offer extended service life and high grinding precision.

4. For fine operations like grinding, polishing, or deburring, resin-bonded grinding wheels are recommended. Their moderate bonding strength produces a finer surface finish during grinding and minimizes the risk of scratching the workpiece surface.