316 stainless steel, 06Cr17Ni12Mo2 (old version 0Cr17Ni12Mo2, American standard S31608) has particularly good corrosion resistance, atmospheric corrosion resistance and high temperature strength due to the addition of Mo, 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, installations in coastal areas, ropes, CD rods, bolts, nuts, etc. are also often used.
316 stainless steel exhibits a higher tendency to stick and is more ductile than steel, which means the material used to cut 316 stainless steel must be more tough.
The micro-geometry of the cutting edge is also very important. During the cutting process, a sharp cutting edge can reduce strain hardening. The depth of cut needs to be constantly varied to spread the risk of excessive groove wear when cutting strain-hardened layers while ensuring excellent chip formation.
Precisely because stainless steel processing has higher requirements on tool materials, coatings and chip breaker geometry, it is not easy to be recognized by customers in the market.
Due to 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, etc.
When milling stainless steel, extreme pressure emulsions or vulcanized cutting oils should be used. The milling speed of stainless steel milling cutters made of carbide should be 40~60 m/min. In order to prevent the cutting edge from cutting in the hardened layer and accelerate tool wear, the feed rate should be greater than 0.1 mm.
316 stainless steel milling features
Compared with 45# steel, the processability 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, austenite and carbonate mixtures have poor processability.
1. 316 stainless steel has high plasticity, large strengthening coefficient, and serious work hardening. Austenitic stainless steel is very unstable and easily transforms into martensite under the action of cutting forces.
2. The depth and length of austenitic stainless steel are 2.5 times that of 45# steel. The plastic deformation is large during milling, which increases the cutting force, severe work hardening, high thermal strength, and is not easy to cut, curl and break.
3. 316 stainless steel has large plastic deformation, increased friction, and relatively low thermal conductivity. Therefore, 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. Stainless steel has relatively large plasticity and toughness, and it is not easy to break during milling.
Under high temperature and high pressure, tools are prone to adhesive wear and built-up edge.
5. Of course, stainless steel milling cutters are used to process stainless steel, because the TiC hard points of stainless steel can easily cause severe grinding and wear of the cutter.
Under high-speed, high-temperature, and high-pressure conditions, cutting and cutting tools are prone to adhesion, diffusion, and crater wear.
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