Quality control and testing methods of stainless steel forgings

Stainless steel forging is an important industrial component, its quality directly affects the performance and service life of the product. Therefore, the quality control and detection of stainless steel forgings is very important.

1. Quality control

Raw material control: The production of stainless steel forgings requires the use of high-quality stainless steel materials, such as stainless steel 304, 316, etc. The quality of raw materials directly affects the quality of forgings. Therefore, it is necessary to carry out strict quality inspection of raw materials to ensure that they meet the requirements.

Production process control: The production process of stainless steel forgings includes multiple steps, such as pre-heating, forging, annealing treatment, heat treatment, etc. Each step needs to be carried out in strict accordance with the process requirements to ensure the quality of the forging.

Quality management system: Establish a sound quality management system, and strictly monitor and record the quality of each production link to ensure that the quality of each link meets the requirements.

Second, detection methods

Appearance inspection: Appearance inspection is a method to check the surface quality of stainless steel forgings. The surface of the forging is observed visually or with a magnifying glass to check for scratches, dents, pores and other defects.

Dimensional inspection: Dimensional inspection is a method to check the dimensional accuracy of stainless steel forgings. The dimensions of the forgings are measured by measuring tools to check whether they meet the requirements of the drawings.

Mechanical properties testing: Mechanical properties testing is a method to check the mechanical properties of stainless steel forgings. Tensile test, impact test, hardness test and other means to test the strength, toughness, hardness and other indicators of forging.

Metallographic testing: Metallographic testing is a method of checking the internal structure of stainless steel forgings. By means of cutting, grinding and polishing, the metallographic structure inside the forging is observed, and the grain size, carbide distribution and other indicators are judged.

Non-destructive testing: Non-destructive testing is a method of inspecting the surface and internal defects of stainless steel forgings. The cracks, pores and other defects on the surface and inside of forgings are detected by means of X-ray inspection and ultrasonic inspection.

In summary, the quality control and testing methods of stainless steel forgings include raw material control, production process control, quality management system, appearance testing, size testing, mechanical properties testing, metallographic testing and non-destructive testing and other means. These methods work together to ensure that the quality of stainless steel forgings meets the requirements.