High temperature and high strength low-carbon martensite refractory steel and preparation method thereof
A technology of low-carbon martensite and heat-strength steel, which is applied in the field of aero-engines, can solve problems such as insufficient high-temperature strength, difficulty in meeting the strength and safety requirements of load-bearing components, and working temperature limits, so as to avoid the precipitation of delta ferrite and improve The effect of application stability and high temperature resistance
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0062] The present invention also provides a method for preparing high-temperature, high-strength, low-carbon martensitic heat-strength steel according to any of the above-mentioned embodiments, comprising the following steps:
[0063] Smelting steps: Prepare raw materials according to the following mass percentages:
[0064] C: 0.10~0.25wt%, Cr: 10.0~13.0wt%, Ni: 2.0~3.2wt%, Mo: 1.50~2.50wt%, Si≤0.60wt%, Mn≤0.60wt%, W: 0.4~0.8wt% %, V: 0.1-0.5wt%, Co: 0.3-0.6wt%, Al: 0.3-1.0wt%, Nb: 0.01-0.2wt%, the rest is Fe, and then the raw materials are smelted to obtain a smelted billet.
[0065] The process of raw material smelting is well known to those skilled in the art, and the present invention is not particularly limited. For example, the method of vacuum induction melting + electroslag remelting (ESR) can be used, and electric arc furnace (EAF) + refining (LF) can also be used. + Vacuum degassing (VD) + Electroslag remelting (ESR) and other smelting methods that can guarantee t...
Embodiment 1
[0086]
[0087] Prepare raw materials by the following mass percentages:
[0088] C: 0.14wt%, Cr: 10.3wt%, Ni: 2.05wt%, Mo: 1.55wt%, Si: 0.35wt%, Mn: 0.31wt%, W: 0.42wt%, V: 0.16wt%, Nb: 0.08wt%, Co: 0.3wt%, Al: 0.28wt%, and the rest is Fe, and the raw materials are smelted to obtain a smelted billet.
[0089]
[0090] For the forging of the smelted slab, the initial forging temperature is 1100°C, and the final forging temperature is 880°C to obtain steel ingots.
[0091]
[0092] Carry out normalizing treatment to the steel ingot, the normalizing treatment temperature is 1100 ℃, the holding time is 3h, and then air-cooled to room temperature.
[0093]
[0094] Heat the heat-treated steel ingot to 1150°C in a high-temperature furnace for 2 hours, then water-cool to room temperature, then heat to 580°C and temper for 2 hours, then cool to room temperature, and then heat the quenched and tempered steel ingot at 480°C for 6 hours. Then cool to room temperature.
Embodiment 2
[0096]
[0097] Prepare raw materials by the following mass percentages:
[0098] C: 0.18wt%, Cr: 12.8wt%, Ni: 2.53wt%, Mo: 2.44wt%, Si: 0.4wt%, Mn: 0.51wt%, W: 0.38wt%, V: 0.23wt%, Nb: 0.12wt%, Co: 0.33wt%, Al: 0.31wt%, and the rest is Fe. The raw materials are smelted to obtain a smelted billet.
[0099]
[0100] For smelting slab forging, the initial forging temperature is 1100°C and the final forging temperature is 860°C to obtain steel ingots.
[0101]
[0102] The steel ingot is annealed at 900°C, held for 8 hours, then cooled to 520°C with the furnace, and then air-cooled to room temperature.
[0103]
[0104] Heat the heat-treated ingot to 1200°C in a high-temperature furnace for 1 hour, then water-cool it to room temperature, then heat it to 600°C and temper it for 2 hours, then cool it to room temperature, and then heat the tempered steel ingot at 500°C for 4 hours. Then cool to room temperature.
PUM
Property | Measurement | Unit |
---|---|---|
tensile strength | aaaaa | aaaaa |
tensile strength | aaaaa | aaaaa |
elongation | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com