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Method for improving wearability of wearable high manganese steel using asymmetrical rolling

A technology of asynchronous rolling and high manganese steel, applied in manufacturing tools, arc welding equipment, welding equipment, etc., can solve the problems of complex production process, equipment, plasticity and toughness, etc., and achieve good wear resistance and easy plastic processing , wear reduction effect

Inactive Publication Date: 2009-03-11
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

After this kind of deformation, the strength of high manganese steel, especially the yield strength, increases significantly, which can be increased by more than 2 times, but at the same time, the plasticity and toughness of the steel decrease, and the production process and equipment are complicated.

Method used

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  • Method for improving wearability of wearable high manganese steel using asymmetrical rolling

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Embodiment 1: steel for railway turnout

[0026] 1. Smelting: Molten steel is smelted by oxidation method to make phosphorus and other oxides react to form stable compounds, which are removed with slag.

[0027] 2. Modeling: Silica sand or limestone raw sand is used to make water glass sand or clay dry mold sand for molding.

[0028] 3. Pouring: The principle of sequential solidification is adopted, the riser gate is used with spacers, and the inner gate enters the riser tangentially to increase the temperature of the riser molten steel and increase the feeding efficiency of the riser. Adding chilled iron improves the cooling capacity of the mold and controls the solidification speed of the casting.

[0029] 4. Cooling: After the casting is poured and solidified, loosen the box in time, remove the fastening bolts of the sand box and lift away the pressure iron to reduce shrinkage resistance and prevent cracks. The outlet temperature of simple and thin-walled castings ...

Embodiment 2

[0035] Example 2: Steel for ball mill liner

[0036] 1. Smelting: Molten steel is smelted by oxidation method to make phosphorus and other oxides react to form stable compounds, which are removed with slag.

[0037] 2. Modeling: Silica sand or limestone raw sand is used to make water glass sand or clay dry mold sand for molding.

[0038]3. Pouring: The principle of sequential solidification is adopted, the riser gate is used with spacers, and the inner gate enters the riser tangentially to increase the temperature of the riser molten steel and increase the feeding efficiency of the riser. Adding chilled iron improves the cooling capacity of the mold and controls the solidification speed of the casting.

[0039] 4. Cooling: After the casting is poured and solidified, loosen the box in time, remove the fastening bolts of the sand box and lift away the pressure iron to reduce shrinkage resistance and prevent cracks. The outlet temperature of simple and thin-walled castings is c...

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Abstract

This invention discloses a method for improving wear resistance of wear-resistant high-Mn steel by cross-shear rolling. The high-Mn steel comprises: C 1.1-1.3 wt.%, Mn 11-14 wt.%, Si 0.3-0.8 wt.%, S less than 0.013 wt.%, and P less than 0.027 wt.%. The method comprises: casting high-Mn steel, performing water-toughening treatment on the cast (sigmab greater than 700 MPa, epsiv greater than 15%, ak greater than 180 J / cm3, and HB less than 250), performing cross-shear rolling on the cast plates (sigmab greater than 900 MPa, epsiv greater than 12%, ak greater than 120 J / cm3, and HB less than 350), and welding or machining to obtain qualified product. The method increases initial hardness and decreases initial wear of high-Mn steel, makes plastic processing much easier than common rolling, and maintains good impact toughness of high-Mn steel.

Description

Technical field: [0001] The invention relates to a production method of wear-resistant high manganese steel, in particular to a method for improving the wear resistance of wear-resistant high manganese steel by using asynchronous rolling. Background technique: [0002] Wear-resistant steel is a kind of wear-resistant material widely used in various wear conditions. Since Hadfield (UK) invented wear-resistant high manganese steel in 1882, new wear-resistant steel types have emerged in an endless stream for more than 100 years. Its smelting , casting, heat treatment and machining processes are continuously improved, the comprehensive mechanical properties, wear resistance and service life of wear-resistant steel are gradually improving, and its application fields are expanding day by day. It is widely used in metallurgy, mining, building materials, electric power, railway and In various sectors such as the military, such as excavator bucket teeth, ball mill lining plates, crus...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/04C21D1/26C21D7/02B23K9/00
Inventor 张贵杰李海英
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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