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Heat-resistant steel for coke oven grate bars

A technology of heat-resistant steel and grate, which is applied in the field of coke oven grate steel and heat-resistant steel, can solve the problems of high price, high use cost, poor oxidation resistance, etc., and achieve low cost, good oxidation resistance, and use low cost effect

Inactive Publication Date: 2009-04-01
郭玉宝
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of poor oxidation resistance, peeling, high use cost or high price of existing steel materials used for coke oven grates, the present invention provides a heat-resistant steel used for coke oven grates.

Method used

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Embodiment Construction

[0006] Heat-resistant steel for coke oven grates, including the following elements by weight: C≤0.50%, Si 2.5% (or 2.6% or 2.7%), Cr 19% (or 17% or 17.5% or 18% or 18.5% %), Mn 10% (or 10.5% or 11% or 11.5% or 12%), S≤0.05%, P≤0.05%, N 0.30% (or 0.22% or 0.23% or 0.24% or 0.25% or 0.26% or 0.27% or 0.28% or 0.29%), RE (rare earth) 0.08% (or 0.09% or 0.10% or 0.11% or 0.12%), B 0.007% (or 0.005% or 0.006%), Ti 0.05% (or 0.06 % or 0.07% or 0.08%), Ni 4.5% (or 3.5% or 3.8% or 4.0% or 4.2%); and carry out the following heat treatment: heating to 1000°C (or 1010°C or 1020°C or 1030°C or 1040°C or 1050°C) solid solution treatment. During specific implementation, the content of each element in the heat-resistant steel is adjusted respectively by adding ferrosilicon, ferrochrome, ferromanganese, chromium nitride, rare earth (usually adopting rare earth silicon, rare earth magnesium), ferroboron, ferrotitanium and ferronickel. Technicians in the field of steelmaking can easily adjust...

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Abstract

The invention relates to a steel material, in particular to a steel material used for coke furnace grate bar, which is exactly heat-resistant steel- 50Cr17Mn12SiNREBTiNi. The invention solves the problems that the steel material which is used for manufacture the grate bar has low oxidative resistance, high cost or high price, and are easy for peeling and the like. The invention includes the following elements according to weight percentage: C: is less than 0.50: percent, Si: 2.5 percent-2.7 percent, Cr: 17 percent-19 percent, Mn: 10 percent-12 percent, S: less than or equal to 0.05 percent, P: less than or equal to 0.05 percent, N: 0.22 percent-0.30 percent, RE: 0.08 percent-0.12 percent, B: 0.005 percent-0.007 percent, Ti: 0.05 percent-0.08 percent, Ni: 3.5 percent-4.5 percent, and also carries out the following heat treatment of: heating up to 1000-1050 DEG C and then carring out solution treatment. The invention has the advantages of oxidation-resistivity, no peeling even used for long time and high temperature resistance (above 900 DEG C). The heat-resistant steel is durable and has low use cost.

Description

technical field [0001] The invention relates to steel materials, in particular to steel materials used for coke oven grates, specifically heat-resistant steel for coke oven grates—50Cr17Mn12SiNREBTiNi. Background technique [0002] At present, most of the coke oven grates are made of white iron or Cr28 steel. The coke oven grate made of white iron has poor oxidation resistance, peels off after using for a period of time, and has a short service life, so it needs to be replaced frequently, and the use cost is high; Cr28 steel is relatively expensive, and also has poor oxidation resistance, peeling after using for a period of time The problem. At present, the manufacture of coke oven grates requires a high temperature resistant, oxidation resistant, non-peeling and relatively low cost steel. Contents of the invention [0003] In order to solve the problems of poor oxidation resistance, peeling, high use cost or high price of existing steel materials used for coke oven grat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/60C22C38/58
Inventor 郭玉宝
Owner 郭玉宝
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