Abrasion-resistant cast iron material

Abstract

The invention provides an abrasion-resistant cast iron material, and belongs to the technical field of cast iron materials. The cast iron material consists of the following components in percentage by weight: 2.0 to 3.2 percent of C, 0.6 to 1.2 percent of Si, 2.0 to 3.5 percent of Mn, 12 to 22 percent of Cr, 0 to 0.6 percent of Cu, 0.06 to 0.3 percent of V, 0.02 to 0.15 percent of Ti, 0.001 to 0.003 percent of B, 0.02 to 0.06 percent of Al, 0.02 to 0.15 percent of RE, less than or equal to 0.06 percent of S, less than or equal to 0.1 percent of P, and the balance of iron. In the abrasion-resistant cast iron material, noble metal elements such as molybdenum, tungsten, nickel and the like are substituted by adopting proper manganese (Mn) and trace boron (B), so that the production cost of the cast iron material is greatly reduced; and meanwhile, by adopting the alloy of the proper manganese (Mn) and the trace boron (B), the quenching property and the hardening capacity of the cast iron material are improved. The cast iron material can be used for preparing abrasion-resistant components of lining plates, hammers, steel balls, metallurgical rollers, impurity pumps, overflow componentsand the like.

Description

technical field [0001] The invention relates to a wear-resistant cast iron material. Background technique [0002] my country's chromium-based anti-wear cast iron materials have experienced the historical stage of development from low-chromium cast iron to high-chromium cast iron. Metallurgical rolls, impurity pump flow parts, liners, hammer heads, steel balls, etc. produced by cast iron materials. Due to the high content of alloying elements, the eutectic carbide (M7C3) is distributed in a discontinuous network, and the hardness (HRC) and impact toughness (ak) of high-chromium cast iron materials are high, especially when preparing wear-resistant liners for ball mills in the cement industry. It exhibits excellent wear resistance, and its service life is 4-8 times that of ordinary high-manganese steel linings, and 3-6 times that of medium-alloy steel linings, and is favored by the market. [0003] However, due to the lack of hardenability and toughness of single chromium (C...

AI Technical Summary

Problems solved by technology

[0003] However, due to insufficient hardenability and toughness of single chromium (Cr) alloyed cast iron, the core of the casting has poor wear resistance or early fracture

In order to improve hardenability and hardenability, the traditional solution is to add precious alloy elements such as molybdenum (Mo), nickel (Ni), copper (Cu), tungsten (W) to improve, such as the famous American cIimax company Cr15-Mo2-Cu1 and Cr20-Mo2-Cu1 grades of high chromium wear-resistant cast iron, my country GB / T8263---2010 "White Iron Castings" and GB / T24597---2009 "Chromium Manganese Tungsten" BTMCr12Mn3W2 and BTMCr18Mn3W2 in "Abrasion-Resistant Iron Castings" cannot fundamentally get rid of the use of precious metals such as molybdenum

At the same time, the extensive use of these precious metals will lead to an increase in the manufacturing cost of wear-resistant cast iron materials, and these elements are strategic resources that are scarce in the country, which will inevitably restrict the development of wear-resistant cast iron materials

[0004] It is reported in the literature that "substituting manganese for molybdenum" is used to manufacture high-chromium cast iron impurity pump flow parts, such as "Development and Application of High-Carbon High-Chromium Manganese Wear-resistant Cast Iron" and "Thermal Processing Technology" of "Mechanical Engineer" magazine, 1990. Magazine No. 6, 1999 "Development of New High Chromium Manganese Wear-resistant Cast Iron Impeller" and "Nonferrous Equipment" Magazine No. 1, 2006 "Development and Application of High Chromium Manganese Wear-Resistant Cast Iron on Slurry Pump Flow Parts", etc., but, The manganese (Mn) element content in the cast iron material using "manganese instead of molybdenum" is too high, it is easy to form a coarse grain structure, and it will also lead to an increase in the retained austenite of the material, which will eventually affect the improvement of the wear resistance of the material