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Low-chromium alloy cast ball

A chromium alloy and cast ball technology, applied in the field of wear-resistant materials, can solve the problems of excessive alloying elements and increased cost, and achieve the effects of good toughness and low cost

Inactive Publication Date: 2014-08-13
安徽新马铸造科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technical solution contains too many alloying elements, which leads to an increase in cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A low-chromium alloy casting ball, the components and weight percentages are: C: 2.8%, Mn: 0.9%, Cr: 0.8%, Si: 0.7%, Cu: 0.09%, S: 0.01%, P: 0.016%, Mo: 0.6%; the balance is Fe.

[0021] The preparation method comprises the following steps:

[0022] (1) raw material smelting, the temperature is 1320 degrees Celsius;

[0023] (2) pouring, the temperature is 1080 degrees Celsius;

[0024] (3) heat treatment, first heating at 540 degrees Celsius for 3 hours, and then heating at 320 degrees Celsius for 3.2 hours.

[0025] C forms a stable compound with Fe, Cr, Mn, and improves its hardness and wear resistance through heat treatment; C and other elements have a synergistic effect to improve the overall performance of the cast ball.

[0026] Mn is a strengthening element and improves its wear resistance.

[0027] Mo can effectively inhibit the aggregation of cementite, strengthen the austenite structure, increase the strength and hardness of the hammer head, enhance the d...

Embodiment 2

[0030] A low-chromium alloy casting ball, the components and weight percentages are: C: 2.7%, Mn: 1.0%, Cr: 1.1%, Si: 0.8%, Cu: 0.08%, S: 0.016%, P: 0.018%, Mo: 0.7%; the balance is Fe.

[0031] The preparation method comprises the following steps:

[0032] (1) raw material smelting, the temperature is 1340 degrees Celsius;

[0033] (2) pouring, the temperature is 1060 degrees Celsius;

[0034] (3) Heat treatment, first heating at 520 degrees Celsius for 3.1 hours, and then heating at 340 degrees Celsius for 3.0 hours.

[0035] C forms a stable compound with Fe, Cr, Mn, and improves its hardness and wear resistance through heat treatment; C and other elements have a synergistic effect to improve the overall performance of the cast ball.

[0036] Mn is a strengthening element and improves its wear resistance.

[0037] Mo can effectively inhibit the aggregation of cementite, strengthen the austenite structure, increase the strength and hardness of the hammer head, enhance th...

Embodiment 3

[0040] A low-chromium alloy casting ball, the components and weight percentages are: C: 2.4%, Mn: 1.6%, Cr: 0.8%, Si: 0.5%, Cu: 0.1%, S: 0.02%, P: 0.02%, Mo: 1.0%; the balance is Fe.

[0041] The preparation method comprises the following steps:

[0042] (1) raw material smelting, the temperature is 1360 degrees Celsius;

[0043] (2) pouring, the temperature is 1120 degrees Celsius;

[0044] (3) heat treatment, first heating at 580 degrees Celsius for 2.6 hours, then naturally cooling to room temperature and then heating at 300 degrees Celsius for 2.6 hours.

[0045] C forms a stable compound with Fe, Cr, Mn, and improves its hardness and wear resistance through heat treatment; C and other elements have a synergistic effect to improve the overall performance of the cast ball.

[0046] Mn is a strengthening element and improves its wear resistance.

[0047] Mo can effectively inhibit the aggregation of cementite, strengthen the austenite structure, increase the strength and...

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Abstract

The invention discloses a low-chromium alloy cast ball, and belongs to the technical field of wear resistant materials. The low-chromium alloy cast ball comprises, by mass, 2.4-3.0% of C, 0.6-1.6% of Mn, 0.8-1.6% of Cr, 0.5-0.8% of Si, 0.05-0.1% of Cu, 0.02% or below of S, 0.02% or below of P, 0.1-1.0% of Mo, and the balance Fe. The cost of the ball is low, the HRC of the ball is not lower than 50, the impact value of the ball is not lower than 1.6J / cm<2>, the life span of fatigue of falling balls is not lower than 11000, the core portion hardness of the ball is basically consistent with the surface hardness of the ball, and the toughness of the ball is good.

Description

technical field [0001] The invention relates to the technical field of wear-resistant materials, in particular to a low-chromium alloy casting ball. Background technique [0002] With the in-depth development of the national economy, new technologies, new equipment, and new materials have attracted more and more attention. According to the statistics of my country's five systems of metallurgy, building materials, electric power, agricultural machinery, and coal, plus the incomplete statistics of automobiles, tractors, and construction machinery in the machinery sector, my country's annual consumption of metal wear-resistant materials is about 3 million tons or more. If the theory of friction and wear is applied to prevent and reduce friction and wear, 15 billion US dollars can be saved every year. Therefore, people pay more and more attention to the development and application of metal wear-resistant materials. [0003] Over the past 30 years of reform and opening up, the ...

Claims

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Application Information

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IPC IPC(8): C22C37/10
Inventor 包玮
Owner 安徽新马铸造科技有限公司
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