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High-Cr abrasion-resistant cast iron steel ball

A wear-resistant cast iron, wear-resistant steel technology, applied in furnaces, heat treatment equipment, heat treatment furnaces and other directions, can solve the problems of insufficient hardenability and toughness, wear resistance can not meet grinding requirements, high cost, improve comprehensive performance, Long service life and optimized production process

Inactive Publication Date: 2014-10-22
NINGGUO SOUTHERN WEAR RESISTANT MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, high-chromium wear-resistant cast iron steel balls usually have insufficient hardenability and toughness, resulting in their wear resistance not meeting the grinding requirements. In order to improve wear resistance, a variety of precious metal elements are added, and the cost is too high. needs to be improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A kind of high chromium wear-resistant cast iron steel ball, the weight percent of its each component is as follows:

[0021] C: 2.7%; Si: 1.0%; Cr: 19%; Mn: 2.4%; V: 0.035%; Ti: 0.025%; Al: 0.3%; B: 0.007%; Mo: 0.2%; S: 0.004%; P: 0.02%; the remainder is Fe;

[0022] According to the above-mentioned distribution ratio of each component, the high-chromium wear-resistant cast iron steel ball is prepared according to the following process steps:

[0023] S1: Weigh the raw materials according to the weight percentage of each component and carry out smelting to obtain molten iron, deoxidize, pour, and after casting and forming, clean up to obtain castings;

[0024] S2: Keep the casting obtained in S1 at 935°C for 2.5 hours, then quench it in water, raise the temperature of the quenched casting to 235°C for tempering treatment, and after holding it for 1.5 hours, move it into the slow cooling pit and slowly cool it to room temperature to obtain the resistance Grinding stee...

Embodiment 2

[0026] A kind of high chromium wear-resistant cast iron steel ball, the weight percent of its each component is as follows:

[0027] C: 2.6%; Si: 0.8%; Cr: 18%; Mn: 2.3%; V: 0.02%; Ti: 0.02%; Al: 0.2%; B: 0.005%; Mo: 0.15%; S: 0.003%; P: 0.01%; the remainder is Fe;

[0028] According to the above-mentioned distribution ratio of each component, the high-chromium wear-resistant cast iron steel ball is prepared according to the following process steps:

[0029] S1: Weigh the raw materials according to the weight percentage of each component and carry out smelting to obtain molten iron, deoxidize, pour, and after casting and forming, clean up to obtain castings;

[0030] S2: Keep the casting obtained in S1 at 930°C for 3 hours, then quench it in water, raise the temperature of the quenched casting to 240°C for tempering treatment, and after holding it for 1 hour, move it into the slow cooling pit and slowly cool it to room temperature to obtain the resistance Grinding steel ball...

Embodiment 3

[0032] A kind of high chromium wear-resistant cast iron steel ball, the weight percent of its each component is as follows:

[0033] C: 2.8%; Si: 1.2%; Cr: 20%; Mn: 2.5%; V: 0.05%; Ti: 0.03%; Al: 0.4%; B: 0.01%; Mo: 0.25%; S: 0.02%; P: 0.06%; the remainder is Fe;

[0034] According to the above-mentioned distribution ratio of each component, the high-chromium wear-resistant cast iron steel ball is prepared according to the following process steps:

[0035] S1: Weigh the raw materials according to the weight percentage of each component and carry out smelting to obtain molten iron, deoxidize, pour, and after casting and forming, clean up to obtain castings;

[0036] S2: Keep the casting obtained in S1 at 940°C for 2 hours, then quench it in water, raise the temperature of the quenched casting to 230°C for tempering treatment, and after holding it for 2 hours, move it into the slow cooling pit and slowly cool it to room temperature to obtain the resistance Grinding steel ball ...

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Abstract

The invention discloses a high-Cr abrasion-resistant cast iron steel ball. The steel ball comprises the following components by weight percent: 2.6% to 2.8% of C, 0.8% to 1.2% of Si, 18% to 20% of Cr, 2.3% to 2.5% of Mn, 0.02% to 0.05% of V, 0.02% to 0.03% of Ti, 0.2% to 0.4% of Al, 0.005% to 0.01% of B, 0.15% to 0.25% of Mo, 0% to 0.02% of S, 0% to 0.06% of P and the balance of Fe. According to the component proportion, the high-Cr abrasion-resistant cast iron steel ball is prepared by carrying out the following process steps: S1, weighing raw materials according to the weight percent of the components and smelting so as to obtain molten iron, deoxidizing, pouring, casting for shaping and then clearing so as to obtain a casting; and S2, carrying out heat preservation on the casting obtained in the step S1 at 930 DEG C to 940 DEG C for 2 to 3 hours, then carrying out water quenching, heating the quenched casting to 230 DEG C to 240 DEG C and tempering, carrying out heat preservation for 1 to 2 hours, moving into a slow cooling pit for slow cooling and cooling to a room temperature so as to obtain the abrasion-resistant steel ball product.

Description

technical field [0001] The invention relates to the technical field of grinding machines, in particular to a high-chromium wear-resistant cast iron steel ball. Background technique [0002] High-chromium wear-resistant cast iron steel balls are the largest wear-resistant material consumption parts in the crushing industry. The domestic mineral processing industry alone needs to consume about 2 million tons of steel balls of various materials every year, and my country's cement industry also needs to consume 200,000 tons a year. . Wear-resistant steel balls are important basic components of ball mills, especially precision industrial steel balls play a huge role in the development of the national economy, and are widely used in cement plants, power plants, etc. [0003] During the operation of high chromium wear-resistant cast iron balls, the working conditions are very complicated. When the moving parts are running at high speed, the steel balls and their supporting devices ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/10C21D9/36
Inventor 熊夏鸣
Owner NINGGUO SOUTHERN WEAR RESISTANT MATERIALS
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