Heat-resistant abrasion-resistant double-phase stainless steel casting alloy material

A technology of duplex stainless steel and casting alloy, applied in the field of steel alloy materials, can solve the problems of excessive corrosion, grate wear, grate fracture, etc. The effect of wear and corrosion resistance

Inactive Publication Date: 2015-03-25
XINGHUA SPECIAL STAINLESS STEEL INST OF SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The grate in the grate incinerator technology is the main key vulnerable part of this technology. It has been in the environment of high temperature, erosion and high chloride ion corrosion for a long time. At present, quite a few manufacturers use heat-resistant austenitic materials. After a certain period of time Excessive wear and corrosion of the grate during operation will easily lead to the breakage of the grate, and failure to shut down in time will cause equipment accidents

Method used

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  • Heat-resistant abrasion-resistant double-phase stainless steel casting alloy material

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Effect test

Embodiment 1

[0017] In this embodiment, the composition and mass percentage of the heat-resistant and wear-resistant duplex stainless steel cast steel material are as follows:

[0018] Cr 27.0

[0019] Ni 4.8

[0020] Mo 0.70

[0021] C 0.35

[0022] Nb 0.30

[0023] Mn 0.51

[0024] V 0.05

[0025] Si 1.2

[0026] S 0.002

[0027] P 0.002

[0028] Fe balance

[0029] The traditional conventional smelting process method is adopted, after comprehensive measurement calculation and ingredient smelting, casting and molding, and finally duplex stainless steel castings are obtained. After solid solution at 1000-1200°C and aging treatment at 700-900°C, a good metallographic microstructure can be obtained. See for example figure 1 As shown, its tensile strength at room temperature is greater than 500 MPa, and its elongation is greater than 20%. The material has good wear resistance and corrosion resistance in the temperature range o...

Embodiment 2

[0031] In this embodiment, the composition and mass percentage of the heat-resistant and wear-resistant duplex stainless steel cast steel material are as follows:

[0032] Cr 25.5

[0033] Ni 4.3

[0034] Mo 0.60

[0035] C 0.25

[0036] Nb 0.50

[0037] Mn 0.82

[0038] V 0.10

[0039] N 0.15

[0040] Si 1.10

[0041] S 0.003

[0042] P 0.003

[0043] Fe balance

[0044] The traditional conventional smelting process method is adopted, after comprehensive measurement calculation and ingredient smelting, casting and molding, and finally duplex stainless steel castings are obtained. After solid solution at 1000-1200°C and aging treatment at 700-900°C, a good metallographic microstructure can be obtained. See for example figure 2 As shown, its tensile strength at room temperature is greater than 500 MPa, and its elongation is greater than 20%. The material has good wear resistance and corrosion resistance in the ...

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Abstract

The invention relates to a heat-resistant abrasion-resistant double-phase stainless steel casting alloy material, and belongs to the technical field of steel and iron alloy materials. The heat-resistant abrasion-resistant double-phase stainless steel casting alloy material comprises the following components in percentage by mass: 0.15-0.45% of C, 25.0-28.0% of Cr, 4.0-6.0% of Ni, 0.5-1.0% of Mo, 0.05-1.5% of Nb, less than or equal to 1.0% of Mn, less than or equal to 1.5% of Si, less than or equal to 0.03% of P, less than or equal to 0.03% of S, less than or equal to 0.5% of C+N, less than or equal to 1.5% of Nb+V, and the balance of Fe and inevitable impurities. A solid-solution structure of the steel in the component range comprises ferrite and austenite, wherein the austenite accounts for 40-60%, the room-temperature tensile strength is 500-700 MPa, and the elongation percentage is more than 20%. The alloy material is prepared by a conventional smelting process method comprising the following steps: smelting ingredients, performing cast molding, performing solid-solution treatment at 1000-1200 DEG C and aging treatment at 700-900 DEG C, and performing mechanical processing. The alloy material has very good abrasion resistance at 650-950 DEG C and is a relatively good candidate material for manufacturing a mechanical grate for a garbage power station.

Description

technical field [0001] The invention relates to a heat-resistant and wear-resistant duplex stainless steel casting alloy material, which belongs to the technical field of iron and steel alloy materials. Background technique [0002] Duplex stainless steel cast steel plays a very important role in the development and application of wear-resistant and corrosion-resistant cast steel, especially in the fields of petrochemical and marine engineering. [0003] As cities grow bigger and bigger, the disposal of domestic waste becomes increasingly serious. Currently, municipal solid waste is mainly disposed of by landfill and incineration for power generation. Waste incineration power generation is mainly divided into two technologies: circulating fluidized bed incinerator and grate incinerator according to different incinerator technologies. The grate furnace technology directly incinerates garbage, has low requirements on the quality and composition of garbage, simple pre-treatme...

Claims

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Application Information

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IPC IPC(8): C22C38/48
Inventor 肖学山张娇娇李钧徐裕来冉庆选彭伟张华伟吉利文
Owner XINGHUA SPECIAL STAINLESS STEEL INST OF SHANGHAI UNIV
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