The porosity generated during the manufacturing process of stainless steel castings is a common quality problem. To solve the porosity problem, the manufacturer of Dalian stainless steel castings can adopt the following methods:

1. Material selection: High quality stainless steel materials have a lower tendency towards porosity, and stainless steel materials with a lower tendency towards porosity can be selected to reduce the generation of porosity. When selecting stainless steel materials, it is necessary to consider factors such as their chemical composition, smelting and melting processes, as well as the purity and uniformity of the materials.

2. Melting and purification: In the manufacturing process of stainless steel castings, treating the melt through melting and purification processes can effectively reduce the generation of pores. The smelting and purification processes include high-temperature treatment, vacuum treatment, and the use of deoxidizers.

3. Melt treatment: During the casting process, reasonable melt treatment is used to reduce the generation of pores. Melt treatment includes degassing treatment, refining treatment, and adjusting alloy composition. Degassing treatment can reduce the gas content by adding deoxidizers; Refining treatment can improve the purity and uniformity of the melt by adding refining agents; Adjusting the alloy composition can adjust the properties of the melt by controlling the alloying element content of stainless steel.

4. Pouring process control: During the casting process, reduce the generation of pores through a reasonable pouring process. The pouring process control includes pouring temperature, pouring speed, pouring method, etc. Reasonable control of pouring temperature and pouring speed can improve the fluidity of the melt, facilitate the discharge of gas, and reduce the generation of pores. Choosing appropriate pouring methods, such as vacuum casting, pressure casting, etc., can also effectively reduce the generation of pores.

5. Mold design and process technology: In the manufacturing process of stainless steel castings, reasonable mold design and process technology are used to reduce the generation of pores. Mold design should consider the flow state and filling ability of the melt to reduce the possibility of gas trapping and inclusions. The process technology includes the control of filling and cooling processes. Through reasonable filling and cooling measures, gas trapping and inclusions can be reduced.

6. Non destructive testing: In the manufacturing process of stainless steel castings, non-destructive testing such as ultrasonic testing, X-ray testing, etc. can be carried out to timely detect and eliminate porosity problems. Non destructive testing can evaluate the quality of stainless steel castings by detecting the presence of defects such as pores inside, and take timely measures to repair or remove non-conforming products.

For stainless steel casting manufacturers, solving the problem of porosity is an important part of improving product quality and performance. By using the above methods, the generation of pores can be effectively reduced, and the quality and reliability of stainless steel castings can be improved.