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Mining machinery high-strength axle manufacturing method

A manufacturing method and high-strength technology, applied in the field of mining machinery and equipment, can solve the problems of low strength, poor quality, inconvenient manufacturing, etc., and achieve the effects of good mechanical performance, long service life and convenient operation

Inactive Publication Date: 2018-02-27
CHENGDU SHUANGLIU JINSHI MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the prior art, most of the mining machinery axle castings are completed by sand casting. Since the operating environment of mining machinery is relatively harsh, the axles made by sand casting have poor quality and low strength when used on mining machinery and equipment. , low precision defects, and it is inconvenient to manufacture, and the service life of the mold is short

Method used

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Embodiment Construction

[0016] The present invention is further described below, but the protection scope of the present invention is not limited to the following description.

[0017] It is characterized in that: comprising the following steps:

[0018] S1, metal mold preparation: adopt machining or casting molding to prepare metal molds;

[0019] S2. Smelting: AOD refining furnace is used to smelt molten steel, P≤0.03% and S≤0.035% in molten steel, and the smelting temperature is not lower than 1400°C;

[0020] S3. Raw material pouring: Nitrogen gas is introduced, pressurized on the metal liquid surface, so that the metal liquid enters the mold through the riser pipe and crystallizes into a billet. The pouring process ensures the airtightness of the furnace and the mold. The gas pressure is 30-40KPa, and the metal Liquid rising speed is 8-10mm / s;

[0021] S4, solid solution treatment: when the temperature is 1120-1150 ℃, direct water quenching;

[0022] S5. Cleaning: After cooling to room temper...

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Abstract

The invention relates to a mining machinery high-strength axle manufacturing method and belongs to the technical field of mining machinery. The mining machinery high-strength axle manufacturing methodis characterized by comprising the following steps that 1, a metal mold is prepared, specifically, the metal mold is prepared through machining or casting forming; 2, smelting is conducted, specifically, molten steel is smelted through an AOD refining furnace, wherein in the molten steel, the content of P is smaller than or equal to 0.03%, the content of S is smaller than or equal to 0.035%, andthe smelting temperature is no smaller than 1400 DEG C; 3, raw material pouring is conducted; 4, solution treatment is conducted, specifically, when the temperature is 1120-1150 DEG C, water quenchingis directly conducted; 5, cleaning is conducted, specifically, cooling is conducted till the temperature reaches the indoor temperature, and a high-pressure water case cleaner is adopted for cleaning; 6, the interior of a cast is detected; and 7, polishing is conducted, specifically, the surface of a workpiece which passes inspection in the step 6 is polished. The mining machinery high-strength axle manufacturing method has the beneficial effects that the technique is simple, operation is convenient, the mechanical performance of the manufactured mining machinery axle cast is good, and the service life of the metal mold is long.

Description

technical field [0001] The invention relates to the technical field of mining machinery and equipment, in particular to a method for manufacturing high-strength axles of mining machinery. Background technique [0002] In the prior art, the axle castings of mining machinery are mostly completed by sand casting. Since the operating environment of mining machinery is relatively harsh, the axles made by sand casting have poor quality and low strength when used on mining machinery and equipment. , low precision defects, and it is inconvenient to manufacture, and the service life of the mold is short. Contents of the invention [0003] In order to solve the above technical problems, a technical solution adopted by the present invention is to provide a method for manufacturing high-strength axles of mining machinery. [0004] The purpose of the present invention is achieved through the following technical solutions: a method for manufacturing high-strength axles of mining machin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/06C21C7/10C21C7/068C21C7/064C21D1/18
CPCB22C9/06C21C7/064C21C7/068C21C7/10C21D1/18
Inventor 李永林
Owner CHENGDU SHUANGLIU JINSHI MACHINERY