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Low carbon high alloy steel for ball mill lining and its making process

A ball mill liner and manufacturing method technology, applied in the direction of manufacturing tools, heat treatment process control, heat treatment equipment, etc., can solve the problems of wear resistance, insufficient corrosion resistance, brittleness of medium and low alloy steel, poor corrosion resistance, poor toughness, etc. , to achieve good wear resistance, low Ni content, and lower lining cost

Inactive Publication Date: 2007-03-21
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among the current mainstream materials, high manganese steel has more than toughness, but insufficient wear resistance and corrosion resistance; The comprehensive impact corrosion wear performance is not good

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The alloy composition by weight percentage is: 0.18%C, 10.0%Cr, 1.0%Mo, 1.5%Mn, 0.5%RE, 0.5%Ti, 0.5%Si, 0.035%P, 0.035%S, and the balance is Fe and impurities . The melting temperature is 1600°C, and the casting temperature is 1400-1500°C. Al is added as a deoxidizer during smelting (the amount added is 0.2% by weight). The steel mold is used for casting, and the mold is preheated at 250°C before casting. After the ingot is formed, heat it at 900°C for 2 hours for homogenization annealing. After rough machining, it will be quenched and tempered. The process is: preheat at 550°C for 1 hour, then heat to 1000°C for 0.5 hours and then quench. , followed by tempering at 250°C for 2 hours to obtain the final liner product.

Embodiment 2

[0043]The alloy composition by weight percentage is: 0.22%C, 9.0%Cr, 1.0%Ni, 0.3%Mo, 1.5%Mn, 0.5%RE, 0.5%Ti, 0.5%Si, 0.035%P, 0.035%S, the balance For Fe and impurities. The melting temperature is 1600°C, and the casting temperature is 1400-1500°C. Al is added as a deoxidizer during smelting (the amount added is 0.2% by weight). The steel mold is used for casting, and the mold is preheated at 250°C before casting. After the ingot is formed, heat it at 900°C for 2 hours for homogenization annealing. After rough machining, it will be quenched and tempered. The process is: preheat at 550°C for 1 hour, then heat to 1000°C for 0.5 hours Quenching followed by tempering at 250°C for 2 hours yields the final liner product.

Embodiment 3

[0045] The alloy composition by weight percentage is: 0.20%C, 9.0%Cr, 0.7%Mo, 1.5%Mn, 0.5%RE, 0.5%Ti, 0.5%Si, 0.035%P, 0.035%S, and the balance is Fe and impurities . The melting temperature is 1600°C, and the casting temperature is 1400-1500°C. Al is added as a deoxidizer during smelting (the amount added is 0.2% by weight). The steel mold is used for casting, and the mold is preheated at 250°C before casting. After the ingot is formed, it is kept at 900°C for 2 hours for homogenization annealing. After rough machining, it is quenched and tempered, and then quenched and tempered. The process is: preheat at 550°C for 1 hour, and then reheat Keep at 1000°C for 0.5 hours, then quench, and then temper at 250°C for 2 hours to obtain the final liner product.

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PUM

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Abstract

The present invention is low carbon high alloy steel for ball mill lining and its making process, and the features that the lining steel has the composition of C 0.15-0.30 wt%, Cr 5.0-10.0 wt%, Ni 0-1.5 wt%, Mn 0.5-1.7 wt%, Mo 0-1.5 wt%, RE 0-0.8 wt%, Ti 0-1.0 wt%, Si 0-1.6 wt%, P 0.01-0.045 wt%, S 0.01-0.045 wt%, other metal and non-metal elements not more than 3 wt% and Fe for the rest. The lining of the low carbon high alloy steel has excellent wear resistance in the wet ore grinder environment, service life as long as twice that of lining of high manganese steel, and low cost.

Description

technical field [0001] The invention relates to an alloy liner steel and a manufacturing method thereof, more specifically, an alloy liner steel applied on a wet ball mill liner and a manufacturing method thereof. Background technique [0002] After more than 30 years of development, the production and application of foreign liner materials have experienced from high manganese steel, ordinary white cast iron, nickel hard cast iron, high chromium white cast iron to modified high manganese steel and various quenching and tempering processes. The development stage of low and medium alloy steel. In domestic practical applications, high manganese steel is still dominant, and has not been replaced by high alloy cast iron and medium and low alloy martensitic steel. This is mainly due to the quality, stability and process of medium and low alloy steel. determined by the problem. Among the current mainstream materials, high manganese steel has more than toughness, but insufficient ...

Claims

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Application Information

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IPC IPC(8): C22C38/50C22C33/04B22D11/18C21D1/18C21D1/26C21D11/00
Inventor 杜晓东
Owner HEFEI UNIV OF TECH
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