Stainless steel grinding program
Stainless steel is a type of metal that has a degree of corrosion resistance in the atmosphere or in certain corrosive media. Because of these advantages, it is widely used in different industries of the current society. Stainless steel grinding burns have been plagued by grinding. Briefly introduced the classification of stainless steel and the characteristics of stainless steel grinding, stainless steel grinding burns and solutions.
One: 7" cut off disc for stainless steel classification:
Martensitic stainless steel (common grades are 1Cr13, 2Cr13, 8Cr13, 1Cr17Ni2, etc.)
Ferritic stainless steel (common grades are 0Cr13, 1Cr14S, 1Cr17, 1Cr17Ti, etc.)
Austenitic stainless steel (common grades are 1Cr18Ni9Ti, 0Cr18Ni9, 1Cr18Ni9, etc.)
Precipitation hardening type stainless steel (common grades are 0Cr17NiCu4Nb, 0Cu17Ni7Al, 0Cr15Ni7Mo2Al, etc.)
It can be classified into a Cr system (SUS400), a Cr-Ni system (SUS300), a Cr-Mn-Ni (SUS200), and a curing system (SUS600).
Two. Features of grinding stainless steel:
1. Stainless steel has high toughness and high heat strength, while the cutting edge of the grinding wheel has a large negative rake angle. During the grinding process, the grinding debris is not easily cut, 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 ° C ~ 1500 ° C. At the same time, under the action of high temperature and high pressure, the grinding debris is easy to adhere to the grinding wheel, filling the gap of the abrasive particles, so that the abrasive particles lose the cutting effect. The type of stainless steel is different, and the condition of the grinding wheel is different.
2. The thermal conductivity of stainless steel is small, the high temperature during grinding is difficult to output, and the surface of the workpiece is easily burned and annealed. The depth of the annealed layer can sometimes reach 0.01 to 0.02 mm. Severe fracture deformation during the grinding process results in work hardening on the abrasive surface. In particular, when austenitic stainless steel is ground, the austenite structure is not stable enough, and martensite structure is likely to occur after grinding, and the surface hardening is severe.
3, stainless steel has a large coefficient of linear expansion, which is easily deformed under the action of grinding heat, and the size is difficult to control. This is especially true for thin walls and elongated components. Most types of stainless steel cannot be magnetized. In the case of surface grinding, the workpiece can only be clamped by mechanical clamping or special clamps. The workpiece is clamped to the side of the workpiece, causing deformation and shape or dimensional errors. protruding. At the same time, it also produces jitter and scale-like ripples during the grinding process.