630 MPa-grade high-strength hot-rolled reinforced bar and production process thereof
A kind of steel bar and high strength technology, applied in the field of 630MPa high-strength hot-rolled steel bar and its production process, it can solve the problems of difficulty in guaranteeing the yield platform, low yield strength of hot-rolled steel bar, etc., to avoid excessive corrosion rate and hardness, and uniform elongation. , The effect of strong anti-hysteresis fracture
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0034] The 630MPa grade high-strength hot-rolled steel bar in this embodiment has the following chemical composition by weight: C: 0.38%, Cr: 1.1%, Mn: 0.75%, Mo: 0.25%, Si: 0.21%, S: 0.025%, P: 0.03%, N: 0.025%, the balance is Fe.
[0035] The production technology of the 630MPa level high-strength hot-rolled steel bar of the present embodiment is carried out according to the following steps:
[0036] (1) Send the smelted steel bar into the heating furnace and heat it to 1200°C, then quickly cool the steel bar to 610°C through the first online cooling process, and then quench it with water or quenching liquid in the quenching device for 12 seconds, and then pass through The tempering heating furnace is heated to 660°C for tempering, and then cooled to normal temperature through the second cooling process;
[0037] The first cooling process: use water cooling to water-cool the steel bars to 610°C at a cooling rate of 15°C / s;
[0038] The second cooling process: the combinati...
Embodiment 2
[0045] The 630MPa grade high-strength hot-rolled steel bar in this embodiment has the following chemical composition by weight: C: 0.41%, Cr: 0.8%, Mn: 1.0%, Mo: 0.15%, Si: 0.15%, S: 0.015%, P: 0.025%, N: 0.015%, and the balance is Fe.
[0046] The production technology of the 630MPa level high-strength hot-rolled steel bar of the present embodiment is carried out according to the following steps:
[0047] (1) Put the smelted steel bar into the heating furnace and heat it to 1100°C, then cool the steel bar quickly to 620°C through the first online cooling process, and then quench it with water or quenching liquid in the quenching device for 13 seconds, and then pass through The tempering heating furnace is heated to 600°C for tempering, and then cooled to normal temperature through the second cooling process;
[0048] The first cooling process: use water cooling to cool the steel bars to 620°C at a cooling rate of 16°C / s;
[0049] The second cooling process: the combination ...
Embodiment 3
[0056] The 630MPa grade high-strength hot-rolled steel bar in this embodiment has the following chemical composition by weight: C: 0.43%, Cr: 0.9%, Mn: 0.85%, Mo: 0.2%, Si: 0.3%, S: 0.013%, P: 0.015%, N: 0.012%, and the balance is Fe.
[0057] The production technology of the 630MPa level high-strength hot-rolled steel bar of the present embodiment is carried out according to the following steps:
[0058] (1) Put the smelted steel bar into the heating furnace and heat it to 1010°C, then quickly cool the steel bar to 630°C through the first online cooling process, and then quench it with water or quenching liquid in the quenching device for 14 seconds, and then pass through The tempering heating furnace is heated to 520°C for tempering, and then cooled to normal temperature through the second cooling process;
[0059] The first cooling process: use water cooling to water-cool the steel bars to 630°C at a cooling rate of 17°C / s;
[0060] The second cooling process: the combina...
PUM
Property | Measurement | Unit |
---|---|---|
yield strength | aaaaa | aaaaa |
diameter | aaaaa | aaaaa |
elastic modulus | 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