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Stainless steel with capabilities of high temperature resistance and anti-corrosion, manufacturing method and application thereof

A manufacturing method, stainless steel technology, applied in the field of metallurgy, can solve the problems of high temperature creep resistance and high temperature durability, yield strength, plastic elongation, area shrinkage, low carbide unevenness, and cost increase. Achieve good high-temperature creep performance and high-temperature durability, improve the results of durability tests and creep tests, and improve performance indicators

Inactive Publication Date: 2010-03-24
BAOSHAN IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

This manufacturing process has the following problems: 1) the casting ingot shape is small, which reduces the yield of the product; 2) the forging blank is used for production, and the cost of forging blank in the metallurgical manufacturing plant is relatively high; 3) the forging blank requires 4- 5 fires are carried out, which increases energy consumption and costs; 4) The main performance indicators such as yield strength, plastic elongation, section shrinkage, and carbide unevenness are low
This stainless steel belongs to austenitic heat-resistant steel, but its high-temperature creep resistance and high-temperature durability are not high

Method used

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  • Stainless steel with capabilities of high temperature resistance and anti-corrosion, manufacturing method and application thereof
  • Stainless steel with capabilities of high temperature resistance and anti-corrosion, manufacturing method and application thereof
  • Stainless steel with capabilities of high temperature resistance and anti-corrosion, manufacturing method and application thereof

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Embodiment 1-3

[0034] Select high-quality C, Cr, Ni, Fe and other metal raw materials for vacuum smelting. When the vacuum degree reaches ≤2.7Pa, the power can be increased for melting; during the refining period, the vacuum degree should reach 2.7Pa as much as possible, the molten pool is calm, and the refining is 25 minutes. After refining, close the vacuum valve and fill with Ar6666pa, add Si, Mn, Nb, V, C, Nb, V respectively at 0.10%, slowly add in batches when adding alloy materials, after one alloy is melted, add the following an alloy. After the feeding is completed, after the C is melted, the high and low power are alternately stirred, and the steel is tapped 10 minutes after the C is melted, and the temperature is measured and sampled before tapping. The tapping temperature is 1520±10°C, filled with Ar to protect the pouring, and pouring φ325 electrodes.

[0035] Using notoginseng slag system (CaF 2 :Al 2 o 3=70:30) remelting electroslag into φ500 electroslag ingot, forging hea...

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Abstract

The present invention provides a stainless steel with capabilities of high temperature resistance and anti-corrosion, which comprises components by weight percentage as follows: 0.1%<=C<=0.2%, 0.5%<=Si<=1.0%, 1.0%<=Mn<=2.0%, P<=0.009%, S<=0.004%, Al<=0.03%, 0.02%<=Nb<=0.04%, 0.02%<=Ti<=0.03%, 0.015%<=V<=0.060%, 0.0015%<=B<=0.0020%, the residual is Fe and other unavoidable impurity. A manufacturingmethod includes: vacuum smelting + electroslag remelting steel-making technology, forging technology and solid-smelting treatment technology. Compared with the same kind of material in foreign, the stainless steel provided by the invention has obviously increased room-temperature mechanical property, lasting test and creep deformation test result, which is specially suitable for manufacturing a furnace shaft with capability of high temperature resistant.

Description

technical field [0001] The invention belongs to the field of metallurgy, and relates to a heat-resistant stainless steel and a manufacturing method and application thereof. Background technique [0002] Heat-resistant stainless steel is a stainless steel with high temperature resistance, oxidation resistance, fatigue resistance and high deformation resistance at high temperatures. Because stainless steel contains Cr, compared with carbon steel and low-alloy steel, it has strong high-temperature corrosion resistance and austenite high-temperature strength, so it is used as heat-resistant steel in many occasions, martensitic or ferritic heat-resistant The creep strength of steel drops sharply from 500-550°C, but the creep strength of austenitic heat-resistant steel is still high until around 700°C, so austenitic heat-resistant steel is generally used for equipment that requires high heat resistance Manufacturing, the commonly used austenitic heat-resistant steel has 309, 310 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/58C22C33/00
Inventor 李瀑
Owner BAOSHAN IRON & STEEL CO LTD
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