White cast iron with higher impact resistance and manufacturing method thereof

Abstract

The invention discloses white cast iron with higher impact resistance and a manufacturing method thereof, and belongs to the technical field of iron-carbon alloy. The white cast iron is prepared fromthe following components in percentage by weight: 8-12% of C, 0.05-0.25% of Si, 6.0-7.0% of Cr, 0.2-0.38% of Mn, 3.6-4.2% of Ni, less than or equal to 0.98% of Mo, less than or equal to 0.045% of P, less than or equal to 0.06% of S and the balance of Fe. The components of the white cast iron with higher impact resistance are more reasonable, the manufacturing process is reasonable and clear, the quenching and tempering temperatures are determined through two times of quenching and tempering, the quenching and tempering temperatures are determined through experiments, and the treatment is carried out at the temperatures, so that the toughness and wear resistance of the white cast iron are greatly improved, the working life is longer, the manufacturing is easier, the mechanical properties ofthe white cast iron can be greatly improved, and the use requirements of strong impact and the like can be met.

Description

technical field [0001] The invention belongs to the technical field of iron-carbon alloys, and relates to white cast iron and a manufacturing method thereof, in particular to white cast iron with high impact resistance 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 is very brittle. It is suitable for making parts with small impact load, and is generally used in plowshares, gri...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the disadvantages of low toughness, low impact resistance and poor fracture resistance of white cast iron during use, the present invention proposes white cast iron with high impact resistance and a manufacturing method thereof. The composition of the white cast iron is more Reasonable, longer working life, easier to manufacture, can greatly improve the mechanical properties of white cast iron, and can meet the needs of strong impact and other uses