Steel for high-strength mining machine and manufacturing method thereof

A mechanical steel, high-strength technology, applied in the field of alloy structural steel, can solve the problems of long production downtime, high pick loss, low pick life and cutting efficiency, etc.

Inactive Publication Date: 2011-11-23
LAIWU IRON & STEEL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention meets the needs of high-yield and high-efficiency mine construction and development, solves the problems of coal mine roadheader pick life and cutting efficiency, long production downtime, and high pick loss, and provides a high-strength, high-toughness and wear-resistant , steel for mining machinery with excellent overall performance and heavy load bearing and manufacturing method thereof

Method used

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  • Steel for high-strength mining machine and manufacturing method thereof
  • Steel for high-strength mining machine and manufacturing method thereof
  • Steel for high-strength mining machine and manufacturing method thereof

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Embodiment Construction

[0049] The present invention will be further described below in conjunction with the examples, but the present invention is not limited thereto.

[0050] Embodiment 1~4, relevant process data are listed in table 4,5.

[0051] A high-strength steel for mining machinery, which is smelted by UHP super-power electric furnace, LF external refining, VD vacuum degassing treatment process, continuous casting casting billet, and rolling into lumber process to produce steel. The embodiment specifically illustrates how the present invention is implemented with the production process of Φ36mm steel.

[0052] The production process is as follows:

[0053] (1) Smelting: use electric furnace smelting, the end point [C]≥0.10%, [P]≤0.015%, the content of residual elements meets the design requirements, the tapping temperature of molten steel is 1630~1640℃; LF refining outside the furnace, the basicity of refining slag 4.2, the retention time of white slag is 18 minutes; vacuum treatment afte...

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Abstract

The invention relates to a steel for a high-strength mining machine, which comprises the following components in percentage by weight: 0.32-0.39% of C, 1.10-1.40% of Si, 0.80-1.10% of Mn, 0.005-0.020% of P, 0.001-0.025% of S, 1.10-1.40% of Cr, 0.01-0.20% of Cu, 0.01-0.30% of Ni, 0.010-0.060% of Al, 5-20*10<-6> of O, and the balance of Fe and inevitable impurities. The invention also provides a preparation method of the steel for a high-strength mining machine. The steel provided by the invention has excellent comprehensive properties; and the cutting picks of the manufactured heading machine satisfy the operational requirements for large-size mining machines, and enhance the coal production efficiency and economic benefit.

Description

technical field [0001] The invention belongs to the technical field of alloy structural steel, and in particular relates to a high-strength mining machinery steel and a manufacturing method thereof. Background technique [0002] The roadheader is the tunneling equipment for underground roadway railway and tunnel construction in coal mines. The cutting head of the working mechanism for crushing hard objects such as coal and rock is one of its important components. When the roadheader is working, the pick will bear high compressive stress, shear stress and impact load. Coal and rock also contain hard minerals such as Coal gangue, etc., will be greatly impacted, and the picks will heat up during coal mining and rock drilling, which will lead to the softening of the tooth top material and accelerate the failure process of the picks. [0003] CN101899624A discloses a high-carbon and low-alloy large-scale forged wear-resistant steel ball for mining and a production method thereof...

Claims

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Application Information

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IPC IPC(8): C22C38/40
Inventor 翟正龙戈文英郭晖吴希周卢栋徐锋毛建强郑桂芸
Owner LAIWU IRON & STEEL GRP
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