Stainless Steel Casting parts Are Processed By Methods

Date:17-10-2017

Castings are made of various casting methods of metal forming objects, that is, smelting good liquid metal, with casting, injection, suction or other casting method into the prepared mold, after cooling and other subsequent processing means after grinding , The resulting objects with a certain shape, size and performance. In Stainless Steel Casting Parts, the austenitic and biphasic (austenitic ferrite) stainless steel work hardening phenomenon is most prominent because the plasticity of stainless steel, plastic deformation lattice distortion, strong coefficient of strengthening. And austenite is not stable enough, under the action of the cutting stress, part of the austenite will be converted into martensite, coupled with the compound impurities in the role of cutting heat, easy to break down the distribution of the distribution, so that the hardening layer The Plastic deformation during cutting and friction between the tools are very large, resulting in more cutting heat.

Stainless steel casting parts will be deformed in the cutting process, especially austenitic stainless steel (the elongation of more than 1.5 times the steel more than 1.5 times), so that increased cutting force. At the same time, stainless steel processing hardening serious, high heat intensity, and further increase the cutting resistance, chip crimping break is also more difficult. Plastic deformation during cutting and friction between the tools are very large, resulting in more cutting heat. A large number of cutting heat are concentrated in the cutting area and the interface of the contact, the poor heat dissipation conditions in the same conditions, the cutting temperature is higher than the 45 steel about 200 ℃.

Stainless steel casting parts plasticity, toughness are great, in high temperature, high pressure, stainless steel and other metals affinity, easy to produce adhesion phenomenon, and the formation of tumor, not only exacerbate the tool wear, but also the phenomenon of tearing The surface of the martensitic stainless steel with a lower carbon content is more pronounced. Cutting the stainless steel in the process of affinity, so that between the knife to produce bonding, diffusion, so that the tool has a bond wear and wear, diffusion wear, resulting in tool nose face crescent depression, cutting edge will also form a small peeling and gap; With the carbide in the stainless steel (such as TiC) high hardness, cutting directly with the tool contact, friction, scratches the tool, as well as the work of hardening, will make the tool wear worse.