High-yield-point white cast iron and manufacturing method thereof

Abstract

The invention discloses high-yield-point white cast iron and a manufacturing method thereof and belongs to the technical field of iron-carbon alloys. The high-yield-point white cast iron comprises chemical components including, by mass percent, 7.7%-18% of C, 3%-15% of Si, 3.5%-6.5% of Mn, not more than 0.006% of P, not more than 0.005% of S and the balance Fe. The components are novel, the manufacturing process is reasonable and clear, the chemical component proportion of the white cast iron is provided, the form of carbide is improved in an isothermal cooling and aging manner, the yield point of a cast is increased, the high-yield-point white cast iron is easier to manufacture, the mechanical performance of the white cast iron can be greatly improved, and alternating loads and other theusing occasions can be met.

Description

technical field [0001] The invention belongs to the technical field of iron-carbon alloys, and relates to a white cast iron, in particular to a white cast iron with a high yield point and a manufacturing method thereof. Background technique [0002] Cast iron in which carbon exists in the form of cementite, its cross-section is off-white. It is a good anti-wear material and works under abrasive wear conditions. White cast iron includes ordinary white cast iron, low alloy white cast iron, medium alloy white cast iron and high alloy white cast iron. [0003] Ordinary white cast iron White cast iron with good wear resistance was made in China as early as the Spring and Autumn Period, and was used as some wear-resistant parts. This kind of cast iron has the characteristics of high carbon and low silicon, and has high hardness, but the yield point is very low. It is suitable for manufacturing parts with small impact load, and is generally used in plowshares, grinding discs, gui...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the disadvantages of common white cast iron, such as low yield point and incapable of bearing large pressure and tension, especially under alternating loads, which tend to cause failure during use, the present invention proposes a white cast iron with high yield point and The manufacturing method, the composition of the white cast iron is more reasonable, the working life is longer, the manufacture is easier, the mechanical properties of the white cast iron can be greatly improved, and it can meet the use occasions such as alternating loads