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Low-nickel high performance heat-resistant steel

A heat-resistant steel, high-performance technology, applied in the field of low-nickel high-performance heat-resistant steel

Active Publication Date: 2013-09-18
DALIAN YUGONG WEAR RESISTING TECHNIQU DEVCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the invention is to solve the problem of brittle б phase precipitation in traditional heat-resistant steel between 649-871°C

Method used

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  • Low-nickel high performance heat-resistant steel
  • Low-nickel high performance heat-resistant steel

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0009] The chemical composition of low-nickel high-performance heat-resistant steel is:

[0010]

[0011] According to the above-mentioned ingredients, it is smelted in an intermediate frequency furnace to prepare high-performance low-nickel heat-resistant steel. The heat-resistant steel does not precipitate brittle phases at 649-871 ° C. At 780 ° C, the tensile strength б b 560Mpa, yield strength б s It is 465 MPa.

Embodiment approach 2

[0013] The chemical composition of low-nickel high-performance heat-resistant steel is

[0014]

[0015] According to the smelting method of intermediate frequency furnace for the above ingredients, high-performance low-nickel heat-resistant steel is prepared. The heat-resistant steel does not precipitate brittle б phase at 649-871 ° C, and its tensile strength б at 780 ° C b 565Mpa, yield strength б s 470Mpa

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Abstract

A low-nickel high performance heat-resistant steel belongs to the field of metal materials and is characterized by comprising the following components by mass percentage: carbon (C) 0.22-0.32%, silicon (Si) 0.4-0.6%, manganese (Mn) 0.60-0.80%, chromium (Cr) 17.0-19.0%, nickel (Ni) 6.0-9.0%, tungsten (W) 0.5-2.0%, molybdenum (Mo) 0.05-0.3%, vanadium (V) 0.05-0.4%, titanium (Ti) 0.05-0.40%, and rhenium (RE) 0.05-0.40%. The high temperature mechanical property of the heat-resistant steel is that tensile strength sigma sigma b>540MPa and yield strength sigma s>450 MPa at the temperature of 780DEG C. Due to the fact that W and Mo are added into the components, precipitation of sigma phase is effectively suppressed, and V, Ti and RE are added into the components for deterioration treatment so as to refine crystal particles and improve high-temperature-resistant strength of the heat-resistant steel. Due to the fact that the content of Cr and Ni is greatly reduced, the cost of the heat-resistant steel is half that of Cr25Ni20.

Description

technical field [0001] The invention belongs to the field of metal materials and relates to a low-nickel high-performance heat-resistant steel. Background technique [0002] Traditional heat-resistant steel C: 0.22-0.32%, Si: 0.4-0.6%, Mn: 0.60-0.80%, Cr>18%, Ni: 8.0-14.0%, a brittle б phase precipitates at 649-871 °C , affecting the mechanical properties of heat-resistant steel. [0003] The heat-resistant steel containing Cr25Ni20 does not precipitate б phase, but the cost is high due to the addition of a large amount of Cr and Ni. Contents of the invention [0004] The purpose of the invention is to solve the problem that the brittle б phase is precipitated at 649-871°C in traditional heat-resistant steel. [0005] A low-nickel high-performance heat-resistant steel, characterized in that the heat-resistant steel composition mass percentage is: C: 0.22-0.32%, Si: 0.4-0.6%, Mn: 0.60-0.80%, Cr: 17.0-19.0%, Ni: 6.0-9.0%, W: 0.5-2.0%, Mo: 0.05-0.30%, V: 0.05-0.4%, Ti: ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/50
Inventor 王汉光
Owner DALIAN YUGONG WEAR RESISTING TECHNIQU DEVCO