Mining parts forgings: What are the common quality problems?

Mining parts forgings: What are the common quality problems?

In the mining machinery industry, the quality of parts and forgings directly affects the performance and life of equipment. This paper will discuss the common quality problems of mine parts forgings, as well as the causes and countermeasures of these problems.

1. Cracks
   Crack is a common quality problem in mine parts forging. Due to improper temperature control during forging, impurities in the material or stress concentration, cracks may occur in the forging. The presence of cracks will reduce the strength and durability of forgings and may even lead to equipment failure. Therefore, in the production and processing process, the temperature, material purity and stress distribution should be strictly controlled, and the crack problem should be found and dealt with in time.
   Two, deformation
   Deformation is also one of the common problems in the forging of mine accessories. During the forging process, due to improper operation or equipment failure, the forging may cause deformation. Deformation will affect the dimensional accuracy and shape of the forging, and reduce its performance. For slight deformation, it can be repaired by orthopaedic technology; For severe deformation, it may need to be reworked or scrapped. In order to prevent deformation, the process control and equipment maintenance in the production process should be strengthened.
2. Stomata and slag inclusion
   Porosity and slag inclusion are common internal quality problems in mine parts forgings. The porosity is the hole formed in the forging because the gas is not eliminated in the metal liquid in time, and the slag is the impurity that is not completely removed in the metal liquid. Porosity and slag inclusion will reduce the mechanical properties and corrosion resistance of forgings and affect their service life. In order to reduce the porosity and slag inclusion, the smelting and pouring process should be optimized and the purity control of metal materials should be strengthened.
   Fourth, uneven hardness
   Hardness is one of the important indexes to measure the quality of forging. Uneven hardness can lead to local lack of strength and stress concentration of forging, increasing the risk of damage. The uneven hardness may be caused by uneven heating, uneven cooling or improper heat treatment process. In order to ensure the uniformity of forging hardness, it is necessary to strengthen the temperature control and heat treatment process optimization in the production process.
   Five, poor surface quality
   Poor surface quality is also one of the common problems in the forging of mine accessories. Poor surface quality may affect the corrosion resistance and service life of forgings, while also reducing their aesthetics. Poor surface quality can be due to mechanical damage, oxidation, or decarbonization. In order to improve the surface quality of forgings, protective measures and maintenance in the production process should be strengthened to avoid mechanical damage and oxidation problems.
   To sum up, the common quality problems in the forging of mining accessories include cracks, deformation, porosity and slag inclusion, uneven hardness and poor surface quality. There are many reasons for these problems, and they need to be analyzed and solved according to specific problems. By strengthening process control, optimizing heat treatment process, improving material purity and other measures, these quality problems can be effectively prevented and solved, and the overall quality and reliability of mining accessories forgings can be improved.