Three ways to cut stainless steel plate

In the processing and practical application of stainless steel plate, cutting operation is indispensable. Through cutting, it can meet the needs of various sizes. At present, the common cutting processes mainly include shearing, plasma cutting, sawing and so on. Let's talk about how to cut them in detail.

cut
In shearing and cutting, the most widely used method is to use a shearing machine, which is suitable for ordinary carbon steel and stainless steel, and the cutter for cutting stainless steel is made of high-speed tool steel. To obtain a smooth edge, the cutting surface of the tool should be sharp and free of burrs.
Stainless steel, especially austenitic stainless steel, has higher ductility, so it is necessary to reduce the clearance of the tool when cutting, to ensure that the cut is crisp, and the stainless steel cannot be plastically deformed or pulled down to cover the tool. Before the fracture occurs, the tool should be cut to just half of the thickness of the plate, and the allowance at this time is more suitable. Excessive tool allowance will result in tool damage and very large burrs on the edge of the sheet being cut.
plasma cutting
Due to the refractory properties of the oxide when the stainless steel plate is heated, it is not suitable for gas cutting. Carbon arc cutting cannot be used because of carbon accumulation and intergranular corrosion, and this type of cutting creates a large amount of spatter and sparks that can damage the surrounding steel surface.
Therefore, it is very effective to use plasma to cut stainless steel plates, and for best results, the cutting gas should be changed to a mixture that is most suitable for stainless steel plate cutting. Plasma section cutting will produce splashes that are easy to adhere to the steel surface and should be removed by grinding.
In addition, it should be noted that the wood should not be placed on the surface of the stainless steel to be cut. The wood will be carbonized on the surface of the stainless steel plate to form black marks when heated. These marks are difficult to remove and will lead to the accumulation of carbon on the surface of the stainless steel plate, which is easy to cause crystallisation. intercorrosion.
sawing
There are two types of sawing, band saws and bow saws. Among them, the band saw refers to the use of composite high-speed steel band saw tools when sawing stainless steel plates. When using a band saw blade, a positive inclination and variable spacing should be used, and the spacing should be selected so that at least three teeth are in contact with the workpiece. The cutting data is determined by the stability of the saw blade, its ability and the type of steel to be cut. For austenitic and duplex stainless steels below 75mm, the usual cutting speed is 20-35m/min. Feeding speed is determined by blade spacing, cutting speed and band saw stability.
When using a saw bow to cut stainless steel, a high-speed hacksaw should be used, and a positive inclination should be used to ensure that at least three teeth are connected to the workpiece during operation. The cutting speed is 10-20m/min, and the feeding speed is about 0.1mm/ tooth. Because of the work hardening of the stainless steel plate, it is necessary to protect the forward feed, and the teeth on the saw bow cannot be pulled over the workpiece. If there is friction in the return stroke, the surface of the workpiece will be polished, which will shorten the tool life. At this time, a large amount of cutting lubricant needs to be added. The concentration of the emulsion is about 10-20%, and the flow speed is also higher than that of ordinary carbon steel cutting. speed.