Stainless steel has high toughness and high thermal strength, and the cutting edge of the grinding wheel abrasive grain has a large negative rake angle. During the grinding process, the grinding debris is not easy to be cut off, the cutting resistance is large, and the extrusion and friction are severe. The grinding force per unit area is very large, and the grinding temperature can reach 1000℃～1500℃. At the same time, under the action of high temperature and high pressure, the abrasive debris is easy to adhere to the grinding wheel, filling the gap between the abrasive grains, so that the abrasive grains lose their cutting effect. Depending on the type of stainless steel, the blockage of the grinding wheel is also different. For example, when grinding concentrated nitric acid-resistant stainless steel and heat-resistant stainless steel, the adhesion and blockage are more serious than that of 1Cr18NiTi, while martensitic stainless steels such as 1Cr13 and 2Cr13 are lighter.
The thermal conductivity of stainless steel is small, the high temperature during grinding is not easy to export, and the surface of the workpiece is prone to burns, annealing and other phenomena, and the depth of the annealing layer can sometimes reach 0.01 to 0.02 mm. Severe extrusion deformation occurs during the grinding process, resulting in work hardening of the grinding surface. Especially when grinding austenitic stainless steel, because the austenite structure is not stable enough, it is easy to produce martensite structure after grinding, which makes the surface hardening serious. .
The linear expansion coefficient of stainless steel is large, and it is easy to deform under the action of grinding heat, and its size is difficult to control. Especially for thin-walled and slender parts, this phenomenon is more serious.
Most types of stainless steel cannot be magnetized. During surface grinding, the workpiece can only be clamped by mechanical clamping or special fixtures. The workpiece is clamped by the side of the workpiece, resulting in deformation and shape or size errors. Thin plate workpieces are more prominent. At the same time, it will also cause flutter during grinding and scaly ripples.