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High carbon, manganese and chromium hot rolled round steel for grinding balls and manufacturing method thereof

A high-carbon manganese-chromium grinding ball and a manufacturing method technology, applied in the field of metal smelting, can solve the problems of high cost of composition design, low carbon content of wear-resistant cast steel, etc., and achieve the goal of increasing service life, improving wear resistance, and enhancing hardness Effect

Inactive Publication Date: 2018-08-10
TIANJIN RONGCHENG UNITED IRON & STEEL GRP CO LTD
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Problems solved by technology

The design of ZG50SiMn2Mo wear-resistant steel mainly adopts composition design to achieve bainite structure after air cooling, but the design cost of this composition is high; ZG30CrMn2SiReB martensitic wear-resistant cast steel has low carbon content and sufficient toughness reserve, suitable for abrasive hardness medium wear parts

Method used

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  • High carbon, manganese and chromium hot rolled round steel for grinding balls and manufacturing method thereof
  • High carbon, manganese and chromium hot rolled round steel for grinding balls and manufacturing method thereof

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Embodiment Construction

[0039] The following is attached figure 1 The present invention is described in further detail.

[0040] A method for manufacturing hot-rolled round steel for high-carbon manganese-chromium grinding balls, comprising the following steps:

[0041] Step 1: Add 110t steel containing 0.67-0.73% of C, 0.10-0.17% of Si, 0.70-0.80% of Mn, 0.45-0.55% of Cr, 0.018-0.020% of P and 0.100-0.120% of S to the Carry out smelting in the converter, and then add artificial graphite, deoxidizer, carbon manganese, ferrosilicon, high-carbon ferrochrome, silver, copper, indium and gallium to the converter in sequence, and then add lime and dolomite after they are all melted. At the same time, the whole process Ar is blown in from the bottom of the converter, and the end point of smelting is C≥0.15%, P≤0.018%, the temperature of the molten iron reaches 1620-1650°C, and then the steel is tapped, and lime is added to the ladle, and the amount of lime added is the converter 0.43-0.45% of the total we...

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Abstract

The invention relates to high carbon, manganese and chromium hot rolled round steel for grinding balls. The high carbon, manganese and chromium hot rolled round steel for grinding balls is prepared from the following components in percentage by mass: 0.72-0.82% of C, 0.17-0.35% of Si, 0.70-0.90% of Mn, 0.010-0.030% of P, 0.010-0.030% of S, 0.50-0.70% of Cr, 0.10-0.20% of In, 0.20-0.30% of Ag, 0.15-0.25% of Cu, 0.12-0.18% of Ga and the balance of Fe and inevitable impurities. The round steel contains relatively more elements such as carbon and manganese, so that the grinding balls prepared therefrom have relatively great hardness, and good wear resistance can be ensured when objects with relatively great grinding hardness are ground; meanwhile, the round steel also contains relatively morechromium, so that the round steel has a relatively good ability of resisting corrosion, and the round steel is suitable for being used to grind in various fields.

Description

technical field [0001] The invention relates to the field of metal smelting, in particular to a hot-rolled round steel for high-carbon manganese-chromium grinding balls and a manufacturing method thereof. Background technique [0002] Wear-resistant materials are used in various sectors of metallurgy, mining, building materials, thermal power and machinery industries, with many types and large quantities. High-manganese steel wear-resistant parts have been widely used for grinding balls for a long time. The high-manganese steel wear-resistant parts that have been eliminated abroad account for a large proportion of my country's usage. Abrasiveness and service life cannot be fully utilized, that is, under the condition of low-stress impact abrasive wear, high manganese steel wear-resistant parts cannot give full play to the advantages of material properties, which increases unnecessary production costs. [0003] Therefore, it is of great significance to research and develop ne...

Claims

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Application Information

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IPC IPC(8): C22C38/20C22C38/02C22C38/04C21C7/00C21C7/06C21C7/10C22C33/06
CPCC22C38/20C21C7/0056C21C7/06C21C7/10C22C33/06C22C38/002C22C38/007C22C38/02C22C38/04
Inventor 王忠伟邹建国李俊峰
Owner TIANJIN RONGCHENG UNITED IRON & STEEL GRP CO LTD
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