Casting Quality and Technological Properties of Stainless Steel Castings

1. Casting quality of stainless steel castings

In the production process, there are many factors that affect the quality of stainless steel castings. The alloy uses chromium as the main alloying element, and the Cr content is generally between 13% and 30%. It has good corrosion resistance to oxidizing media and air oxidation resistance at high temperature, and can also be used as heat-resistant steel. The welding performance of this steel is poor. When the chromium content is more than 16%, the as-cast structure is coarse, and if the temperature is kept between 400-525 °C and 550-700 °C for a long time, the "475 °C" brittle phase and σ phase will appear, making the steel brittle.

Stainless steel castings are the general term for steel castings produced from various stainless steel materials, which are mainly used in various medium corrosive conditions. As early as 1910, it was found that when the Cr content in steel exceeds 12%, it has good corrosion resistance and oxidation resistance. In addition to Cr, typical stainless steels also contain one or more other alloying elements, such as Ni, Mo, Cu, Nb, Ti, and N2. Centrifugal casting pipe manufacturers are also called centrifugal casting steel pipes, which are especially suitable for centrifugal casting of heat-resistant steel pipes.

Because the centrifugal casting method produces centrifugal casting pipes, it is not only efficient but also has a dense structure. Therefore, centrifugal casting methods are mostly used in the West. The design process performance of machine tool castings, in the design process, in addition to the need to effectively determine the shape and size of machine tool casting components according to its working conditions and metal materials.

2. Process performance of stainless steel castings

Stainless steel castings must effectively consider the rationality of their design from the perspective of casting process characteristics, so that obvious size effects and problems such as solidification, shrinkage, and stress can be effectively avoided, and the composition segregation and cracking defects of copper castings can be reduced.

The casting process of stainless steel castings needs to be reasonable. In use, according to its weight, structure and size, casting alloy characteristics and production conditions, select the appropriate parting surface, forming and core making methods, and reasonably set chilled iron, casting ribs, risers and gating systems.

The technological performance of machine tool casting design will directly affect the quality of its stainless steel castings. In the process of teaching design, in addition to the development of its working environment conditions and the characteristics of other metal nanomaterials, we need to scientifically and effectively determine its In addition to the geometric information of machine tool castings and different sizes, the rationality analysis of the design and the solidification shrinkage must also be carried out from the perspective of the casting alloy and casting process characteristics.

When the stainless steel casting effectively determines the location of the shrinkage cavity, the final solidification zone of the stainless steel casting is determined to a certain extent. When it is placed directly on the bottom edge of the stainless steel casting chill, this time, for the isophase shift, it will actually be all concentrated in the upper part of the casting in terms of shrinkage holes due to the increased cooling rate.