Steel for ball mill steel ball and preparation method thereof

A ball mill and steel ball technology, applied in the field of iron and steel metallurgy, can solve the problems of high chemical composition alloy elements, low production efficiency, large quality fluctuations, etc., and achieve the effects of high comprehensive performance, improved toughness, and high strength wear resistance

Active Publication Date: 2011-02-02
SHANDONG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In the prior art, the casting process is used to produce steel materials for steel balls, requiring high alloying elements in the chemical composition, low production efficiency, high cost, and large quality fluctuations
So far no large-scale steel industry has been involved in the production of steel materials

Method used

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  • Steel for ball mill steel ball and preparation method thereof
  • Steel for ball mill steel ball and preparation method thereof
  • Steel for ball mill steel ball and preparation method thereof

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preparation example Construction

[0020] The preparation method of above-mentioned steel according to the present invention, comprises the following steps:

[0021] (1) Smelting molten steel; (2) Treating molten steel by refining process outside the furnace, controlling the composition of molten steel by weight percentage: C: 0.75-0.85%, Si: 0.17-0.35%, Mn: 0.70-0.90%, Cr : 0.40~0.60%, Al: 0.010~0.060%, Cu≤0.20%, Ni≤0.20%, P≤0.030%, S≤0.030%, total oxygen content O≤0.002%, the balance is Fe and unavoidable impurities (3) adopting the continuous casting process to form the cast slab from the molten steel refined outside the furnace; (4) preheating the cast slab, and then rolling it to obtain the steel ball for the ball mill.

[0022] Hereinafter, the ball mill steel ball according to the present invention will be mainly carried out in the technological process including ultra-high power electric furnace (UHP), ladle furnace refining method (LF), vacuum degassing method (VD), continuous casting and continuous ro...

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Abstract

The invention relates to steel for a ball mill steel ball and a preparation method thereof. The steel comprises the following components in percentage by weight: 0.75 to 0.85 percent of C, 0.17 to 0.35 percent of Si, 0.70 to 0.90 percent of Mn, 0.40 to 0.60 percent of Cr, 0.010 to 0.060 percent of Al, more than or equal to 0.20 percent of Cu, more than or equal to 0.20 percent of Ni, more than or equal to 0.030 percent of P, more than or equal to 0.030 percent of S, more than or equal to 0.002 percent of O and the balance of Fe and inevitable impurities. The preparation method comprises steps of smelting, refining outdoors, continuous casting and continuous rolling. The steel has the characteristics of high rigidity, high strength, high wear resistance, short production period, low production cost and capability of substituting high-alloy wear-resistant steel serving as the ball mill steel ball.

Description

technical field [0001] The invention relates to the field of iron and steel metallurgy, and more specifically relates to a steel mainly used in ball mill steel balls and a preparation method thereof. Background technique [0002] Ball mill steel balls are undoubtedly the largest wear-resistant material consumable in the world's crushing industry at present and even in the foreseeable future. In 2009, only one industry in China, mineral processing, consumed about 2 million tons of steel balls of various materials, while my country's cement industry 2010 is also expected to consume a record 200,000 tons. Ball mill steel balls are important basic components of ball mills, especially precision industrial steel balls play a huge role in the development of the national economy, and are widely used in cement plants, power plants, etc. [0003] During the operation of the steel ball of the ball mill, the working conditions are very complicated. When the moving parts are running at h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/04C22C38/18B02C17/20
Inventor 马传庆赵冠夫刘金玲孙永喜范夕荣卢栋杨密平倪友来张君平
Owner SHANDONG IRON & STEEL CO LTD
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