High-toughness high-wear-resistance CADI nodular cast iron lining board

Abstract

The invention discloses a high-toughness high-wear-resistance CADI nodular cast iron lining board which is composed of 0.10-0.30% of molybdenum, 0.30-1.20% of chromium, 3.40-3.80% of carbon, 2.40-2.80% of silicon, 0.30-0.60% of manganese, 0-0.030% of phosphorus, 0-0.025% of sulfur, 0.020-0.035% of rare earth, 0.035-0.055% of magnesium and the balance of iron. The CADI nodular cast iron lining board is prepared by the following steps: carrying out austenization treatment on a lining board, which is cast by spheroidized molten iron, at 840-900 DEG C for 1.0-2.0 hours, discharging, transferring into an isothermal quenching furnace, and keeping at the temperature of 250-340 DEG C for 0.5-1.5 hours to carry out isothermal quenching treatment, thereby preparing the high-toughness high-wear-resistance CADI nodular cast iron lining board of which the metallurgical structure is composed of ausferrite, carbide and graphite nodule. The production technique comprises the following steps: producing an alloy nodular cast iron lining board, and carrying out austenization treatment and isothermal quenching treatment on the lining board. The lining board has higher core toughness, and thus, can not rupture; and the lining board has higher hardness and higher wear resistance than the ADI austenite-bainite nodular cast iron, and thus, has longer service life, thereby saving abundant maintenance cost and energy and enhancing the production benefits.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a CADI nodular cast iron liner with high toughness and high wear resistance. Background technique [0002] The liners of existing ball mills, shot blasting machines, cement mixers and other abrasive, crushing, cleaning and mixing equipment are mainly made of high manganese steel and high chromium white cast iron. The high manganese steel liners have low hardness due to no work hardening characteristics. It is not wear-resistant and has a short service life; the high-chromium white cast iron liner has high hardness and wear resistance, but is brittle and easy to break. [0003] Patent No. ZL95101232.0 "A bainite ductile iron ball mill liner" uses bainite nodular cast iron to produce ball mill liners. The comprehensive performance of wear resistance and impact toughness mentioned in the manual is good, but there are low hardness and The disadvantages of wear resistance and...

AI Technical Summary

Problems solved by technology

[0002] The liners of existing ball mills, shot blasting machines, cement mixers and other abrasive, crushing, cleaning and mixing equipment are mainly made of high manganese steel and high chromium white cast iron. The high manganese steel liners have low hardness due to no work hardening characteristics. Not wear-resistant, short service life; high chromium white cast iron liner has high hardness and wear resistance, but is brittle and easy to break

[0003] Patent No. ZL95101232.0 "A bainite ductile iron ball mill liner" uses bainite nodular cast iron to produce ball mill liners. The comprehensive performance of wear resistance and impact toughness mentioned in the manual is good, but there are low hardness and Disadvantages of wear resistance and short service life