Precision steel casting has a long history

Precision steel casting has a long history of application. In ancient times, people used cast steel as coins, sacrificial vessels, weapons, tools and some living utensils. In modern times, steel casting is mainly used as a blank for mechanical parts, and some precision steel casting can also be directly used as mechanical parts. Steel castings occupy a large proportion in mechanical products. For example, in tractors, the weight of steel castings accounts for about 50 to 70% of the weight of the whole machine, agricultural machinery accounts for 40 to 70%, and machine tools and internal combustion engines account for 70 to 90%. Among all kinds of steel castings, mechanical steel castings have many kinds, complex shapes and large amounts, accounting for about 60% of the total output of steel castings. Secondly, metallurgical ingot mold and engineering pipeline. Steel casting is also closely related to daily life.

The quality of steel casting mainly includes appearance quality, internal quantity and use quality. Appearance quality refers to surface roughness, surface defect, size deviation, shape deviation and weight deviation of cast steel. Internal quality mainly refers to chemical composition, physical properties, mechanical properties, metallographic structure, holes, cracks, inclusions, segregation and so on. ; Service quality refers to the working durability of cast steel under different conditions, including wear resistance, corrosion resistance, shock resistance, cold and heat, fatigue absorption and other properties, as well as cut weldability. The quality of cast steel has a great influence on the performance of mechanical products.