How to process stainless steel? High difficulty?

u200bThere are many types of stainless steel like 304, 303 are more common, but why most of the stainless steel processing have the same feeling: stainless steel is difficult to process. In fact, the reason is nothing more than the following:


1: The chemical relationship between the tool and the processed material causes work hardening and low thermal conductivity of the processed material, which not only easily causes unusual wear and tear, but also causes tool chipping and abnormal rupture.

2: Low thermal conductivity causes plastic deformation of the cutting pin blade and faster tool wear.

3: The built-up edge is likely to cause small pieces of micro-chips to remain on the cutting pin edge and cause poor processing surfaces.

4: The machining hardness causes the tool to wear quickly, and it is difficult to remove chips.


Existing the above-mentioned processing problems, the solutions proposed by SJNet are as follows:

1. Tool material selection

Due to the high cutting force and high cutting temperature when machining stainless steel parts, cubic hydrogenation turning blades with hardness second only to diamond and capable of withstanding very high temperatures can be used. In addition, its chemical inertness is very large, and it does not play a chemical role with iron group metals at 1200~1300℃, so it is very suitable for processing stainless steel materials.

Two, tool geometric parameters

The geometric parameters of the tool play an important role in its cutting performance. In order to make the cutting brisk and smooth, the cemented carbide tool should adopt a larger rake angle to increase the tool life. This is conducive to strengthening the blade and giving full play to the superiority of the higher compressive strength of the ceramic tool. The size of the relief angle directly affects the wear of the tool, and also has an impact on the strength of the blade. The change of the entering angle will affect the change of the radial and axial cutting components, as well as the size of the cutting width and cutting thickness.

3. When the rake face is sharpened, the roughness value should be small

In order to avoid chip sticking to the knife, the front and flank surfaces of the tool should be sharpened carefully to ensure a small roughness value, thereby reducing the resistance to chip outflow and avoiding chip sticking to the knife.

Fourth, the cutting edge of the tool should be kept sharp

The cutting edge of the tool should be kept sharp to reduce work hardening, and the feed rate and back-cutting amount should not be too small to prevent the tool from cutting in the hardened layer and affect the tool life.

Five, pay attention to the grinding of the chip breaker

Due to the toughness of stainless steel chips, the chip breaker on the rake face of the tool should be properly ground, so that the cutting process can interrupt chips, contain chips, and facilitate chip removal.

Sixth, the choice of cutting oil should be appropriate

Since stainless steel has the characteristics of easy adhesion and poor heat dissipation, it is very important to choose cutting oils with good anti-adhesive and heat dissipation properties during cutting. Daborun special stainless steel cutting oil.

Seven, the choice of cutting parameters

According to the characteristics of stainless steel materials, it is advisable to select low speed and large feed for cutting. Using the above process method can overcome the difficulties of stainless steel processing, greatly improve the tool life of stainless steel during cutting, reduce the number of times of sharpening and changing tools in operation, and improve the production efficiency and cutting accuracy, reduce the labor intensity and labor intensity of the workers. In terms of comprehensive production costs, satisfactory results can be achieved.