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Standard requirements for stainless steel precision casting

Edit:Xiangyang Liqiang Machinery Co., Ltd.UpDate:2020-10-10

  Stainless steel precision castingCast steel has high dimensional accuracy, general linear tolerance is 1%, angle tolerance is 1/2 degree, and surface finish is RA 1.6-3.2, which can save material and processing costs. Parts with complex shapes can be produced, and multiple parts can be cast into one part, thereby omitting parts or welding operations. Exquisite text or logo patterns can be cast on the surface of the product to enhance the product image. The casting material is heat-resistant, wear-resistant, and corrosion-resistant, and the material hardness reaches HRC15-60, which meets the requirements of various working conditions. The amount of casting production is flexible, from small to mass production, with high efficiency and good repeatability. The mold cost is low, and the initial investment in product development is small.

Most of the large castings are the main loads and pillars of the main technical equipment. The castings are large in size, complex in shape, and large in section thickness. Castings are often in high temperature and high pressure working conditions. The performance and quality requirements are very strict, especially the high temperature performance requirements. Is strict.

Steel castings should be used after heat treatment. There are casting defects such as porosity, cracks, shrinkage and shrinkage, grain thickness, microstructure imbalance and residual internal stress in the casting in the as-cast state, which greatly reduces the strength, especially the plasticity and toughness of the casting.

1. The maximum limit length of precision castings is 700mm, the easy-to-make length is less than 200mm, and the maximum weight is about 100kg, usually under 10kg.

2. The dimensional tolerances of precision castings are 20mm±0.13mm, 100mm±0.30mm, 200mm±0.43mm, and the dimensional accuracy of small parts cannot easily reach ±0.10mm. The angle tolerance is ±0.5~±2.0 degrees, and the minimum thickness of precision castings is 0.5~1.5mm. The surface roughness of precision castings is about Rmax 4S~12S.

3. There are almost no restrictions on the materials of precision castings, such as aluminum alloys, magnesium alloys, titanium alloys, copper alloys, various steels, cobalt-based and nickel-based heat-resistant alloys, and hard materials.

4. Precision castings make workpieces with complex shapes, good dimensional accuracy and cutting processing.

5. Precision castings save material waste and can be mass produced.

Dewaxed precision castings are widely used in jet engines, gas turbines, steam turbines, aircraft parts, internal combustion engines, vehicles, food machinery, printing machinery, paper machinery, compressors, valves, pumps, measuring instruments, sewing machines, weapons, Business machines, and other machine parts.

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