Japanese standard angle steel 125 75 10 day standard angle iron quality control standards
I. Introduction. Japanese standard angle steel is an important steel widely used in construction, bridges, machinery and other fields, with high strength and stability. Among them, the 125*75*10 specification of Japanese standard angle iron is favored because of its wide range of application. However, with the intensification of market competition, product quality has become a key factor in customer choice. This article will introduce in detail the quality control standards of 125*75*10 Japanese standard angle steel.
Second, quality control standards.
1.Chemical composition.
The chemical composition of Japanese standard angle steel 125*75*10 should comply with the provisions of Japanese Industrial Standard (JIS) G3114. The main alloying elements include carbon, silicon, manganese, phosphorus, sulfur, etc., which have an important impact on the mechanical properties and processing properties of steel. Among them, too high carbon content will lead to a decrease in the strength of the steel, and too high phosphorus and sulfur content will lead to an increase in the brittleness of the steel. Therefore, in the production process, the raw materials must be tested for strict chemical composition to ensure product quality.
2.Dimensional accuracy.
The dimensional accuracy of 125*75*10 of the Japanese standard angle steel should meet the provisions of the relevant standards. The main dimensions include section size, side length, thickness, etc. The dimensional accuracy directly affects the assembly and use of components. Therefore, during the production process, the steel must be subjected to strict dimensional inspection to ensure that it meets the standard requirements.
3.Surface.
The surface quality of 125*75*10 Japanese standard angle steel should meet the provisions of relevant standards. The surface should be free of defects such as cracks, folding, bubbles, and slag inclusions. These defects can seriously affect the service life and safety of steel. Therefore, during the production process, the steel must be subjected to strict surface quality testing to ensure that it meets the standard requirements.
3. Quality control measures.
1.Use high-quality raw materials.
The raw materials for the production of Japanese standard angle steel 125*75*10 should be selected from high-quality steel that meets the standards to ensure the stability and reliability of chemical composition, mechanical properties and dimensional accuracy. At the same time, for the raw materials entering the factory, strict inspection and testing should be carried out to ensure that they meet the production requirements.
2.Strengthen production process control.
In the production process, the production process regulations should be strictly implemented, and the key parameters such as heating temperature, rolling pressure, and cooling rate should be controlled to ensure the processing quality and dimensional accuracy of the steel. At the same time, strict monitoring and recording should be carried out for key processes in the production process to ensure that the product quality is stable and reliable.
3.Establish a sound quality inspection system.
Enterprises should establish a sound quality inspection system to conduct comprehensive testing and inspection of raw materials, semi-finished products and finished products to ensure that product quality meets relevant standards and customer requirements. At the same time, the quality problems should be analyzed and dealt with in a timely manner, and effective measures should be taken to improve and perfect.