Title:
CR-NI AUSTENITIC HEAT-RESISTANT STEEL WITH ENDOGENOUS PRECIPITATED REINFORCED PHASE, PREPARATION METHOD THEREFOR AND USE THEREOF
Document Type and Number:
WIPO Patent Application WO/2021/121021
Kind Code:
A1
Abstract:
Disclosed are a Cr-Ni austenitic heat-resistant steel with an endogenous precipitated reinforced phase, a preparation method therefor and the use thereof. The Cr-Ni austenitic heat-resistant steel reinforced by TiC and/or TiB2 particles has a metal and ceramic two-phase structure, so that the mechanical property of the heat-resistant steel can be improved. Furthermore, the high-temperature oxidation resistance of the heat-resistant steel is greatly improved due to the "reaction particle effect" brought about by TiC and/or TiB2. In the heat-resistant steel, the volume fraction of the endogenous precipitated reinforced phase is 1.2-15.9%, and uniform dispersion distribution of ceramic particles in a Cr-Ni austenitic heat-resistant steel matrix can be ensured, such that the high-temperature oxidation resistance of the Cr-Ni austenitic heat-resistant steel is greatly improved under the premise of a relatively low Cr content. The austenitic heat-resistant steel can be applied in the preparation of a heat-resistant component, and can reduce the manufacturing cost of the heat-resistant component.
Inventors:
LUO ZHICHAO (CN)
LIU TIANLONG (CN)
ZHENG KAIHONG (CN)
WANG JUAN (CN)
ZHENG ZHIBIN (CN)
LONG JUN (CN)
LIU TIANLONG (CN)
ZHENG KAIHONG (CN)
WANG JUAN (CN)
ZHENG ZHIBIN (CN)
LONG JUN (CN)
Application Number:
PCT/CN2020/132915
Publication Date:
June 24, 2021
Filing Date:
November 30, 2020
Export Citation:
Assignee:
INSTITUTE OF MATERIALS AND PROC GUANGDONG ACADEMY OF SCIENCES (CN)
International Classes:
C22C38/44; C21C7/06; C22C33/06; C22C38/50
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Attorney, Agent or Firm:
CHOFN INTELLECTUAL PROPERTY (CN)
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