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Machining technology of a low-chromium alloy wear-resistant ball

A processing technology and chromium alloy 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, reduce carbide precipitation, and increase wear resistance. performance effect

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 grinding ball has good wear resistance, its production cost is high, and it 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

[0013] A processing technology for low-chromium alloy wear-resistant balls, including the following components: C 2.8%, Si 2.0%, Mn 1.8, Cr 2%, Cu 0.3%, Ti 0.08%, S≤0.02%, P≤0.02%, The balance is Fe.

[0014] The preparation method of the processing technology of the described low-chromium alloy wear-resistant ball comprises the following steps:

[0015] 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; parts; pouring temperature is 1410°C-1440°C; 3) After pouring, cool down to room temperature and grind, grind the preform into nano powder, then add 0.5-2% graphene, mix well and continue heating to 2200-2300°C to melt molten iron , secondary pouring, the pouring temperature is 1500°C-1520°C to obtain the casting; 4) the casting is put into the furnace for heating, and the temperatur...

Embodiment 2

[0016] Example 2: A processing technology for a low-chromium alloy wear-resistant ball, including the following components: C 2.0%, Si 1.75%, Mn 1.3%, Cr 1.5%, Cu 0.25%, Ti 0.05%, S ≤0.02%, P≤0.02%, the balance is Fe.

[0017] The preparation method of the processing technology of the described low-chromium alloy wear-resistant ball comprises the following steps:

[0018] 1) Raw material smelting: Put the raw materials into the frequency electric furnace for smelting, and the molten iron obtained from smelting comes out of the furnace. The temperature is 1500°C-1550°C; 2) the molten iron is poured to obtain a preform; the pouring temperature is 1410°C-1440°C; 3) after pouring, it is cooled to room temperature and then ground, and the preform is ground into nano-powder, and then added Graphene 0.5%, after mixing evenly, continue to heat to 2200-2300°C to melt molten iron, and pour the second time, the pouring temperature is 1500°C-1520°C to obtain castings; 150°C; keep warm f...

Embodiment 3

[0019] Embodiment 3: A processing technology of a low-chromium alloy wear-resistant ball, including the following components: C 3.3%, Si 2.2%, Mn2.6%, Cr 2.5%, Cu 0.50%, Ti 0.12%, S≤0.02 %, P≤0.02%, and the balance is Fe.

[0020] The preparation method of the processing technology of the described low-chromium alloy wear-resistant ball comprises the following steps:

[0021] 1) Raw material smelting: Put the raw materials into the frequency electric furnace for smelting, and the molten iron obtained from smelting comes out of the furnace. The temperature is 1500°C-1550°C; 2) the molten iron is poured to obtain a preform; the pouring temperature is 1410°C-1440°C; 3) after pouring, it is cooled to room temperature and then ground, and the preform is ground into nano-powder, and then added Graphene 2%, after mixing evenly, continue to heat to 2200-2300°C to melt the molten iron, and pour the second time, the pouring temperature is 1500°C-1520°C to obtain castings; 150°C; keep ...

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Abstract

The invention belongs to the field of casting manufacturing, and particularly relates to a machining technology of a low-chromium alloy wear-resistant ball. The machining technology comprises the following steps that 1) raw materials are smelted, wherein the melting temperature is 1640 DEG C-1680DEG C, and the tapping temperature of molten iron is 1500 DEG C- 550 DEG C; 2) the molten iron is poured to obtain a prefabricated part, and the pouring temperature is 1410 DEG C-1440 DEG C; 3) the prefabricated part is placed in a furnace for heating, the temperature is raised to 100 DEG C-150 DEG C per hour, and heat preservation is performed for 2 hours when the furnace temperature reached 800 DEG C to 850 DEG C; and 4) natural cooling is performed with furnace, tempering temperature is 240 DEGC-260 DEG C, and the length of tempering is maintained at 1.4-1.8 hours. According to the machining technology of the low-chromium alloy wear-resistant ball, high-chromium casting gold materials are high in hardness, the HRC can reach 65, the impact toughness is strong, and the impact value reaches 16 J / cm<2>; the impact fatigue life of falling ball is greater than or equal to 9500 times, the breaking rate is less than 0.9%, and the cost is reduced.

Description

technical field [0001] The invention belongs to the field of casting manufacture, and in particular relates to a processing technology of a low-chromium alloy wear-resistant 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 the high chromium grinding ball has goo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/18C21D5/00C21D5/04C21D9/36C22C33/04C22C33/08C22C37/06C22C37/10
CPCC21D1/18C21D5/00C21D5/04C21D9/36C21D2211/001C22C33/04C22C33/08C22C37/06C22C37/10
Inventor 朱文星朱万军
Owner 安徽宁星铸造有限公司
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