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Low-chrome-alloy grinding ball

A chromium alloy and grinding ball technology, applied in the field of casting manufacturing, can solve the problems of poor wear resistance of steel forging grinding balls, consumption of rare metal chromium, consumption of large steel, etc., to improve strength, improve strength and corrosion resistance, increase resistance The effect of grinding performance

Inactive Publication Date: 2020-02-07
安徽宁星铸造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the high chromium ball has good wear resistance, its production cost is high, and it also consumes a large amount of rare metal chromium in the country; the steel forged grinding ball has poor wear resistance, not only consumes a large amount of steel, but also requires a lot of labor intensity for processing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A low chromium alloy grinding ball, including the following components: C 2.8%, Si 2.0%, Mn 1.8, Cr 2%, Cu0.3%, Ti 0.08%, graphene 0.8%, S≤0.02%, P≤ 0.02%, the balance is Fe.

[0015] The preparation method of described low chromium alloy grinding ball comprises the following steps:

[0016] 1) Raw material smelting: put the raw material into a frequency electric furnace for smelting, and the molten iron obtained by smelting is released; the temperature of the smelting is 1640-1680°C; the temperature of the molten iron is 1500°C-1550°C; 4) pouring the molten iron, Obtain the prefabricated part; the pouring temperature is 1410°C-1440°C; 5) put the preformed part into the furnace for heating, and raise the temperature by 100°C-150°C per hour; when the temperature in the furnace reaches 800°C-850°C, keep it warm for 2 hours; 6 ) Natural cooling with the furnace, tempering temperature: 240-260°C, duration: 1.4-1.8 hours. The alloy grinding ball obtained in this embodiment...

Embodiment 2

[0017] Embodiment 2: A kind of low chromium alloy grinding ball, comprises following composition: C 2.0%, Si 1.75%, Mn 1.3%, Cr1.5%, Cu 0.25%, Ti 0.05%, graphene 0.5%, S≤ 0.02%, P≤0.02%, the balance is Fe.

[0018] The preparation method of described low chromium alloy grinding ball comprises the following steps:

[0019] 1) Raw material smelting: put the raw material into a frequency electric furnace for smelting, and the molten iron obtained by smelting is released; the temperature of the smelting is 1640-1680°C; the temperature of the molten iron is 1500°C-1550°C; 4) pouring the molten iron, Obtain the prefabricated part; the pouring temperature is 1410°C-1440°C; 5) put the preformed part into the furnace for heating, and raise the temperature by 100°C-150°C per hour; when the temperature in the furnace reaches 800°C-850°C, keep it warm for 2 hours; 6 ) Natural cooling with the furnace, tempering temperature: 240-260°C, duration: 1.4-1.8 hours. The alloy grinding ball obt...

Embodiment 3

[0020] Embodiment 3: a kind of low chromium alloy grinding ball, comprises following composition: C 3.3%, Si 2.2%, Mn 2.6%, Cr2.5%, Cu 0.50%, Ti 0.12%, graphene 1%, S≤ 0.02%, P≤0.02%, the balance is Fe.

[0021] The preparation method of described low chromium alloy grinding ball comprises the following steps:

[0022] 1) Raw material smelting: put the raw material into a frequency electric furnace for smelting, and the molten iron obtained by smelting is released; the temperature of the smelting is 1640-1680°C; the temperature of the molten iron is 1500°C-1550°C; 4) pouring the molten iron, Obtain the prefabricated part; the pouring temperature is 1410°C-1440°C; 5) put the preformed part into the furnace for heating, and raise the temperature by 100°C-150°C per hour; when the temperature in the furnace reaches 800°C-850°C, keep it warm for 2 hours; 6 ) Natural cooling with the furnace, tempering temperature: 240-260°C, duration: 1.4-1.8 hours. The alloy grinding ball obtain...

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Abstract

The invention belongs to the field of casing manufacturing and particularly relates to a low-chrome-alloy grinding ball. The low-chrome-alloy grinding ball is prepared from 2.0-3.3% of C, 1.75-2.2% ofSi, 1.3-2.6% of Mn, 1.5-2.5% of Cr, 0.25-0.50% of Cu, 0.05-0.12% of Ti, smaller than or equal to 0.02% of S, smaller than or equal to 0.02% of P and the balance Fe. According to the low-chrome-alloygrinding ball, through reasonable matching of high chrome alloy, the content of precious metal Mo is lowered, and the cost is reduced. The obtained high-chrome casting gold material is high in rigidity and impact toughness, the HRC can reach 60, and the impact value reaches 12 J / cm<2>. The impact fatigue life of a falling sphere is greater than or equal to 9,500 times, the damage percentage is smaller than 0.9%, and the cost is lowered.

Description

technical field [0001] The invention belongs to the field of casting manufacture, and in particular relates to a low-chromium alloy grinding ball. Background technique [0002] In cement, silicate products, new building materials, refractory materials, chemical fertilizers, ferrous and non-ferrous metal beneficiation and glass ceramics and other production industries, ball mills are the main production equipment for crushing and grinding ore, coal, cement and other related materials. Grinding balls are One of its main wearing parts. Compared with other types of grinding balls, high chromium cast iron grinding balls are widely used for their high hardness, low wear, good toughness, less breakage and good comprehensive mechanical properties. [0003] As wear-resistant material grinding balls for anti-abrasive wear, high-chromium grinding balls and steel forged grinding balls are generally used. Although high chromium balls have good wear resistance, their production costs ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/10C22C37/06C22C33/08C21D5/00
CPCC21D5/00C22C33/08C22C37/06C22C37/10
Inventor 朱文星朱万军
Owner 安徽宁星铸造有限公司
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