Stainless Steel Precision Casting Coating

Stainless steel precision casting, also known as lost wax casting, is an advanced process for near-net shape formation. The common method is medium-temperature wax precision casting. Manual casting is still an important method for heavy-duty castings produced in small batches. The medium-temperature wax precision casting manual molding can adapt to various complex requirements and is flexible, and does not require many process equipment. Water glass sand type, VRH method water glass sand type, organic ester water glass self-hardening sand type, clay dry type, resin self-hardening sand type and cement sand type can be applied; for heavy-duty castings produced by one piece, the pit modeling method is low in cost and put into production fast. Medium-temperature wax precision casting mass production or long-term production of stereotyped products using multi-box shape, box molding method is more suitable, although molds, sand boxes, etc. start to invest high, but can be compensated for saving modeling time and improve product quality.
Stainless Steel Precision Casting Coating:
A high exothermic reaction raw material is kneaded on the surface of the substrate (such as steel), and then ignited, the mixture is burned to form a melt, and after cooling, an SHS-melt coating is obtained, and the coating forms a metallurgical bond with the substrate through the transition zone.
To successfully cast a surface coating, the following conditions should be met;
(1) a flammable SHS mixture;
(2) the combustion product is a high temperature melt;
(3) the combustion temperature is higher than the melting point of the substrate;
(4) A metallurgical bond can be formed between the coating and the substrate.
Difficulties in Stainless Steel Precision Casting:
1. Stainless steel precision casting processing hardening: The work hardening tendency is large during cutting, and the tool is cut in the work hardening zone to shorten the tool life.
2. Large cutting force and high cutting temperature: This type of material has high strength, large tangential stress during cutting and large plastic deformation, so the cutting force is large. In addition, the material has poor thermal conductivity, and the high temperature tends to concentrate in the narrow area near the cutting edge of the tool, thus accelerating the wear of the tool.
3. Stainless steel precision casting processing easy to stick knife: no matter any stainless steel, there are characteristics of strong chipping and high cutting temperature during processing. When the strong chips flow through the rake face, the tool wear is accelerated.
4. The tool wear is accelerated, the material generally contains high melting point elements, plasticity, high cutting temperature, which makes the tool wear faster, sharpening the knife and changing the tool frequently, which affects the production efficiency and improves the tool use cost.