Low-cost low-yield-strength anti-knock steel and production method thereof
A low-yield strength and production method technology, applied in low-cost low-yield strength earthquake-resistant steel and its production field, can solve the problems of small thickness specifications of produced products, increased production costs, and high prices of niobium elements, and achieve low production costs, Improved welding performance and simple composition
Inactive Publication Date: 2016-04-13
WUYANG IRON & STEEL
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Abstract
The invention discloses low-cost low-yield-strength anti-knock steel and a production method thereof. The low-cost low-yield-strength anti-knock steel comprises, by weight percentage, not larger than 0.05% of C, not larger than 0.05% of Si, not larger than 0.60% of Mn, not larger than 0.010% of P, not larger than 0.005% of S, 0.015%-0.035% of Ti, 0.020%-0.050% of Alt and the balance Fe and inevitable impurities. The production method includes the steps of smelting, continuous casting, heating, controlled-rolling and controlled-cooling rolling and thermal treatment. By the adoption of composition design that only Ti is added based on low C and low Mn, in combination with the special controlled-rolling and controlled-cooling process and the thermal treatment process, the low-temperature flexible low-yield-strength anti-knock steel with the thickness reaching 80 mm is produced successfully, wherein the yield strength ranges from 205 MPa to 245 MPa, the tensile strength ranges from 300 MPa to 400 MPa, the yield ratio is smaller than or equal to 0.70, the specific elongation is larger than or equal to 50%, and -40 DEG C impact power is larger than or equal to 200 J. By the adoption of the method, the production cost is low, the process is simple, the product performance is excellent, and the comprehensive mechanical performance of products is stable.
Technology Topic
Lower yieldThermal treatment +3
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Property | Measurement | Unit |
Yield strength | 205.0 ~ 245.0 | MPa |
Tensile strength | 300.0 ~ 400.0 | MPa |
Impact energy | >= 200.0 | J |
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