A low chromium high wear resistance ball mill casting ball and its manufacturing method
A technology with high wear resistance and manufacturing method, which is applied in the direction of manufacturing tools, casting molding equipment, casting molds, etc., can solve the problems of low performance index, poor wear resistance, poor toughness, etc., and achieve the improvement of metallographic structure and wear resistance The effect of improving and improving hardness and impact toughness
Active Publication Date: 2018-03-23
湖北华武重工集团有限公司
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Problems solved by technology
[0003] At present, the low chromium casting balls used in ball mills have low hardness and poor toughness, and their hardness is usually not greater than HRC48, and their impact toughness is a k Usually no more than 3J / cm 2 , the wear resistance is poor, and the performance index is far lower than that of high chromium cast balls
However, the manufacturing cost of high-chromium casting balls is much higher than that of low-chromium casting balls, and the cost performance is not high.
Method used
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Embodiment Construction
[0013] The present invention will be further described below in conjunction with specific embodiments.
[0014] This embodiment provides a low chromium high wear resistance ball mill cast ball, the weight percentage of the components contained in the low chromium high wear resistance ball mill cast ball is: C: 2.6-3.0, Si: ≤ 1.0, Mn: 0.8-1.2, Cr: 1.2-2.5, Ti: 0.2-0.3, S: ≤0.1, P: ≤0.1, B: 0.04-0.07, Re: ≤0.1, the matrix is iron.
[0015] The present invention also provides a method for manufacturing the above-mentioned low-chromium high wear-resistant ball mill cast ball, comprising the following steps:
[0016] (1) Control the weight percentage of each component in the molten iron before tapping: C: 2.6-3.0, Si: ≤0.5, Mn: 0.8-1.2, Cr: 1.2-2.5, S: ≤0.1, P: ≤0.1 , the rest is Fe;
[0017] (2) Configure a compound modifier, which is made of calcium-silicon alloy, titanium-iron alloy, boron-iron alloy, and rare earth ferrosilicon alloy. The proportion of silicon-calcium alloy...
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Abstract
The invention provides a low chromium high-abrasion resistance ball mill casting ball and a manufacturing method thereof, and relates to the manufacturing field of ball mill casting balls. By adding appropriate microelements, molten iron is subjection to modification treatment through compound modifier, and the metallographic structure of the casting ball is improved; the hardness and impact toughness of the casting ball is effectively improved, the hardness is improved to be over than HRC 53, and the impact toughness ak reaches 5J / cm<2>, so that the abrasion resistance of the low chromium casting ball can be substantially improved.
Description
technical field [0001] The invention relates to the field of ball mill cast ball manufacturing, in particular to a ball mill cast ball with low chromium and high wear resistance and a manufacturing method thereof. Background technique [0002] Chromium alloy casting ball is a kind of grinding medium widely used in cement, thermal power, magnetic powder, ore dressing and other powder engineering. In order to improve the comprehensive mechanical properties of chromium alloy casting ball such as hardness, toughness and corrosion resistance, and reduce the consumption in use, All production enterprises and scientific research units are constantly exploring and developing new technologies. [0003] At present, the low chromium cast balls used in ball mills have low hardness and poor toughness, and their hardness is usually not greater than HRC48, and their impact toughness is a k Usually not more than 3J / cm 2 , the wear resistance is poor, and the performance index is far lower...
Claims
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IPC IPC(8): C22C37/10C22C33/08B22C9/22B22C9/06B22C9/02C21D9/36
CPCB22C9/02B22C9/06B22C9/22C21D9/36C22C33/08C22C37/06C22C37/10
Inventor 刘清波易良杰王文坚田清国
Owner 湖北华武重工集团有限公司