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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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  • Summary
  • Abstract
  • Description
  • 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 low hardness. The service life of HB130-140 is 300 hours, and the hammer head should be replaced frequently. , the output of power generation cannot be guaranteed, and the material of the hammer head cannot meet the requirements of use, which is the key problem to be solved urgently for the material of the hammer head of domestic fluidized bed boiler pulverizing equipment

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 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 percentage of its composition weight 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] After the inspection and operation of the 670t / h boiler domestic ring coal crusher in Fengzhen Power Plant, the service life of the hammer ring reached 8000 hours, which is higher than that of ZGMn 13 The service life of the international ace wear-resistant steel hammer ring has more than doubled. Thereby meeting the use requirements of the hammer ring, a key vulnerable part of the ring type coal crusher in the thermal power plant, and adding a new variety of steel for wear-...

Embodiment 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 percentage of its composition weight is:

[0018] The percentage by weight of material composition proportioning of the present invention is:

[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 in the ladle after tapping.

[0021] According to the operation assessment on the circulating fluidized bed boiler of Baotou No. 1 thermal power plant, the service life of the finely crushed gangue hammer has been increased by more than 6 times than that of the imported parts (medium carbon low alloy steel), and it is still in operation. The present invention is used in our country To solve the key material problem of coal gangue power generation boilers, the fine...

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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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