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Manufacturing process for low-alloy structural steel for coal mine machinery

A technology of coal mining machinery and manufacturing process, applied in the field of steel processing, can solve the problems of poor mechanical performance, poor low temperature performance, and short service cycle of coal mines, achieve excellent structural performance, improve toughness, and meet the effects of long-term use

Inactive Publication Date: 2017-10-20
曹小荣
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] To sum up, the problems existing in the existing technology are: the current coal mines have poor mechanical properties, are easily damaged due to excessive pressure, are not durable enough, have a short service life, and have poor low-temperature performance.

Method used

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  • Manufacturing process for low-alloy structural steel for coal mine machinery
  • Manufacturing process for low-alloy structural steel for coal mine machinery
  • Manufacturing process for low-alloy structural steel for coal mine machinery

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Embodiment Construction

[0029] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0030] Attached below figure 1 To attach image 3 and specific embodiments to further describe the application principle of the present invention.

[0031] The manufacturing process of the low-alloy structural steel for coal mine machinery includes the following steps:

[0032] S101. Heating the raw material of low alloy steel, heating at 2010°C for 40min in an intermediate frequency furnace;

[0033] S102, forging, using a 2500-ton precision forging machine for forging, the drawing speed of each pass is controlled at 5 m / min, and the last drawing speed is controlled at 3 m / min;

[0034] S103, cooling after forging, the...

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Abstract

The invention belongs to the field of steel, and discloses a manufacturing process for low-alloy structural steel for coal mine machinery. The manufacturing process comprises the following steps of: heating and forging low-alloy steel raw materials, cooling the low-alloy steel raw materials after forging, normalizing the low-alloy steel raw materials, performing air-cooling on the low-alloy steel raw materials, tempering the low-alloy steel raw materials, casting the low-alloy steel raw materials and performing air-cooling on the low-alloy steel raw materials. The alloy steel structure manufactured by the manufacturing process for the low-alloy structural steel for coal mine machinery is excellent in performance, is high in strength, is resistant to pressure, and can meet long-term use requirements; low-carbon structural steel and low-alloy structural steel are treated by a normalizing and tempering process, so that toughness of the low-carbon structural steel and the low-alloy structural steel is improved, an elastic-plastic deformation delay region is relatively great, the grain size of the low-carbon structural steel and the low-alloy structural steel is refined, and good low-temperature performance and quality reliability of steel are guaranteed by continuous casting.

Description

technical field [0001] The invention belongs to the technical field of steel processing, and in particular relates to a manufacturing process of low-alloy structural steel for coal mine machinery. Background technique [0002] With the rapid improvement of my country's coal machine manufacturing technology and production capacity, in line with my country's status as the largest coal consumption and mining country, my country has become the world's largest coal machine manufacturing country. Low-alloy high-strength steel has a series of excellent comprehensive mechanical properties and significant economic benefits such as high strength, good low-temperature impact toughness, long service life, light weight and the ability to build structures with the same load-bearing capacity. The key materials required for the manufacture of coal mine machinery and equipment. [0003] Low-alloy structural steel is developed on the basis of carbon structural steel with a carbon content of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/60C22C38/58C22C38/02C21D8/00C21D1/28
CPCC22C38/60C21D1/28C21D8/005C22C38/002C22C38/02C22C38/34C22C38/58
Inventor 曹小荣沈羽柴晓宇王绍武李姗姗
Owner 曹小荣
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