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Is 316 stainless steel difficult to process? Just see this

316 stainless steel, 06Cr17Ni12Mo2 (old version 0Cr17Ni12Mo2, American standard S31608) Due to the addition of Mo, its corrosion resistance, atmospheric corrosion resistance and high temperature strength are particularly good, and can be used under harsh conditions; excellent work hardening (non-magnetic).

316 stainless steel is widely used in seawater equipment, chemistry, dyes, papermaking, oxalic acid, fertilizers and other fields.
Photography, food industry, facilities in coastal areas, ropes, CD rods, bolts, nuts, etc. are also frequently used.

316 stainless steel shows a higher tendency to adhere and ductile than steel, which means that the material for cutting 316 stainless steel must have higher toughness.

The micro-geometry of the cutting edge is also very important. During the cutting process, the sharp cutting edge can weaken the strain hardening. The depth of cut needs to be continuously varied in order to spread the risk of excessive groove wear when cutting the strain hardened layer, while ensuring excellent Chip forming ability.

It is precisely because of the high requirements of stainless steel machining on tool material, coating and chip breaker geometry that it is not easy to be recognized by customers in the market.

Because of the characteristics of 316 stainless steel, cemented carbide is used to process stainless steel, and tungsten-cobalt fine-grained or ultra-fine-grained cemented carbide containing TaC or NbC is used. Such as YG6x, YG813, YW4, YD15 and so on.

When milling stainless steel, extreme pressure emulsion or vulcanized cutting oil should be used. The milling speed of the stainless steel milling cutter made of cemented carbide should be 40~60 m/min. In order to avoid the cutting of the cutting edge in the hardened layer and speed up the tool wear, the feed rate should be greater than 0.1 mm.

316 stainless steel milling features
Compared with 45# steel, the workability is 1, austenitic stainless steel is only 0.4, ferritic stainless steel is only 0.48, and martensitic stainless steel is only 0.55. Among them, the workability of the mixture of austenite and carbonite is worse.

1. 316 stainless steel has large plasticity, large strengthening coefficient and serious work hardening. Austenitic stainless steel is very unstable and easily transforms into martensite under the action of cutting force.

2. The depth and length of austenitic stainless steel is 2.5 times that of 45# steel, and the plastic deformation during milling is large, which increases its cutting force, serious work hardening, high thermal strength, and difficult cutting curling and breaking.

3. The plastic deformation of 316 stainless steel is large, the friction is intensified, and its thermal conductivity is relatively low, so under the same conditions, the temperature of milling stainless steel is about 200 degrees higher than that of No. 45 steel.

4. When processing 316 stainless steel, it is easy to bond and produce built-up edge. The plasticity and toughness of stainless steel are relatively large, and its cutting is not easy to break during milling.

Under high temperature and pressure, the tool is prone to bond wear and built-up edge.

5. Of course, stainless steel milling cutters are used for processing stainless steel, because the TiC hard point of stainless steel is easy to cause severe grinding and wear of the tool.

Under the conditions of high speed, high temperature and high pressure, the cutting and the tool are prone to bonding, diffusion and crater wear.


Post time: Apr-14-2022

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