RE alloyed antiwear high manganese steel

A rare earth alloy, rare earth ferrosilicon alloy technology, applied in rare earth alloyed wear-resistant high manganese steel, ring hammer and hammer head of fluidized bed boiler pulverizing, ring type coal crusher field, can solve the problem of low hardness and can not guarantee power generation Output, hammer head material can not meet the use requirements and other problems, to achieve the effect of good toughness, long service life and grain refinement

Inactive Publication Date: 2007-08-22
寇生瑞
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in recent years, the fluidized bed boilers of newly-built power plants and the pulverizing equipment are all imported from abroad. The material is not only wear-resistant, but also has high toughness, which ensures safe operation. The hammer head does not break. The imported hammer head prevents running breakage. Without heat treatment, it has good toughness and

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0012] Example 1: High carbon, high manganese, Cr 2 , The composition formula of rare earth makes the alloy obtain austenite structure, and then the austenite structure is homogenized by heat treatment. The weight percentage of the alloy is:

[0013] C: 1.10 Si: 0.60 Mn: 13.00 Cr: 2.20 RE: 0.35 S≤0.03 P≤0.06 The rest is iron;

[0014] Among them, the rare earth is Baotou 1# rare earth ferrosilicon alloy that can be purchased from the market, and 0.3% is added to the ladle after tapping.

[0015] The service life of the hammer ring reaches 8000 hours, which is better than that of ZGMn. 13 The service life of the international ace wear-resistant steel hammer ring has more than doubled. This meets the requirements for the use of the hammer ring, the key wearing part of the ring coal crusher in thermal power plants, and adds new varieties of steel for wear-resistant materials in my country.

Example Embodiment

[0016] Example 2:

[0017] High carbon, high manganese, Cr 2 , The composition formula of rare earth makes the alloy obtain austenite structure, and then the austenite structure is homogenized by heat treatment. The weight percentage of the alloy is:

[0018] According to the weight percentage of the material composition of the present invention:

[0019] C: 1.0 Si: 0.50 Mn: 12.50 Cr: 2.00 RE: 0.33 S≤0.02 P≤0.05 The rest is iron;

[0020] Among them, the rare earth is Baotou 1# rare earth ferrosilicon alloy, and 0.3% is added to the ladle after tapping.

[0021] After the operation test of the circulating fluidized bed boiler in Baotou No. 1 Thermal Power Plant, the service life of the finely divided coal gangue hammer has been increased by more than 6 times than the imported part (medium carbon low alloy steel). It is still in operation. The present invention is used in my country To solve the key material problems of coal gangue power generation boilers, the finely crushed coal ...

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Abstract

The present invention relates to one kind of RE alloyed antiwear high manganese steel, and belongs to the field of metallurgical technology. The RE alloyed antiwear high manganese steel consists of C 0.90-1.30 wt%, Si 0.30-0.80 wt%, Mn 11.00-14.00 wt%, Cr 2.00-2.50 wt%, RE 0.30-0.35 wt%, S not more than 0.03 wt%, P more than 0.06 wt%, and Fe for the rest. The RE alloyed antiwear high manganese steel has homogeneous austenite structure, high toughness, high wear resistance, fine crystal grains and long service life.

Description

1. Technical field [0001] The invention relates to a rare-earth alloyed wear-resistant high-manganese steel, in particular to a ring-type coal crusher, a ring hammer and a pulverizing hammer head of a fluidized bed boiler used in a thermal power plant, and belongs to the field of metallurgy. 2. Background technology [0002] So far, domestic thermal power plants generally use ZGMn steel for the manufacture of hammer rings for ring crushers. 13 Made of trump brand wear-resistant steel, its service life is only about 3600 hours, which is not up to the requirement of a minor repair period of 5000 hours for main equipment. With the development of thermal power construction, fluidized bed boilers are gradually increasing, and the coal quality it uses Poor, there is a lot of coal gangue, the conditions for milling are quite bad, and the requirements for milling equipment are very high. Therefore, in recent years, the fluidized bed boilers of newly-built power plants and the pulve...

Claims

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Application Information

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IPC IPC(8): C22C38/38
Inventor 寇佳楠寇江民寇国珍崔燕寇生瑞
Owner 寇生瑞
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