Stainless steel machining requirements for tools

January 27, 2023

Try not to use carbide tools during finishing. If the workpiece is large, use a prismatic carbide insert to reduce heat and deformation.
Stainless steel "target=_blank> When machining stainless steel, the geometry of the cutting part of the tool should generally be considered from the choice of the front angle and the back angle. When selecting the front angle, consider the type of the flute, the presence or absence of chamfering and the angle of inclination. Factors such as the size of the positive and negative angles. Regardless of the tool, a large front angle must be used when machining stainless steel "target=_blank> stainless steel.

Increasing the rake angle of the tool reduces the resistance encountered during chip cutting and clearing. The selection of the back angle is not very strict, but it should not be too small. If the back angle is too small, it will easily rub against the surface of the workpiece, which will deteriorate the surface roughness and accelerate the wear of the tool. CNC lathe processing and due to strong friction, enhances the effect of stainless steel "target=_blank> stainless steel surface work hardening; the tool back angle should not be too large, the back angle is too large, so that the wedge angle of the tool is reduced, reducing the strength of the cutting edge , accelerates the wear of the tool.

Generally, the relief angle should be larger than that of the conventional carbon steel, such as tungsten-cobalt alloy (YG) and tungsten-cobalt-titanium alloy (YT). Tungsten-cobalt alloy has good toughness. The tool can be made with a larger rake angle and a sharper edge. During the cutting process, the chips are easily deformed, the cutting is light, and the chips are not easy to stick, so in general In the case, it is more suitable to use tungsten-cobalt stainless steel "target=_blank> stainless steel.

Especially in the case of rough machining and interrupted cutting with large vibration, the tungsten-cobalt alloy blade should be used. It is not as hard and brittle as tungsten-cobalt-titanium alloy, and it is not easy to sharpen and easy to chip. Tungsten-cobalt-titanium alloy has good red hardness and is more wear-resistant than tungsten-cobalt alloy under high temperature conditions, but it has high brittleness and is not resistant to impact and vibration. It is generally used as stainless steel "target=_blank> stainless steel precision car cutter. Selection of grades The cutting performance of the tool material is related to the durability and productivity of the tool. The processability of the tool material affects the manufacture and sharpening quality of the tool itself.

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