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Meeting Materials Science & Technology 2020
Symposium Advanced Steel Metallurgy
Presentation Title Effect of Coiling and Annealing Temperature on Nb precipitation, Microstructure and Mechanical Properties of HSLA
Author(s) Lei Cui, Wenjun Wang, Deshun Chen, Yonggang Liu
On-Site Speaker (Planned) Lei Cui
Abstract Scope High Strength Low Alloyed(HSLA) steel has found its worldwide use in multiple industries such as automobile, oil and gas. Nb is usually introduced in the automotive HSLA grade with yield strength exceeding 300MPa. However, variation of yield strength tends to increase as Nb addition is above than 0.04%. To address this scattering, dual micro-alloying strategy with Nb and Ti was applied on galvanized HS420LA grade. The effect of annealing and coiling temperatures on microstructure and precipitation of Nb-rich particles were systematically studied using optical microscope, scanning electron microscope and transmission electron microscopy. Mechanical properties of the Nb+Ti micro-alloyed HSLA420 were compared with that of the Nb-alloyed counterpart. Optimized process with appropriate annealing and coiling temperature results in a significant narrowing of single-coil variation in yield strength, the ratio of steel coil yield strength variation above 20 MPa from 28.7% to 1.5% based on industrial production data


Digital Innovative Design (DID) for Reliable Casting Performance of Steel Castings
Double-Twist Torsion Testing to Assess Partial Recrystallization in Microalloyed Steels
Effect of Coiling and Annealing Temperature on Nb precipitation, Microstructure and Mechanical Properties of HSLA
Microstructure Characterization and Post-heat Treatment Design for High-Strength Low-alloy Steels Strengthened with Fe2SiTi-L21 Precipitates
Microstructure Property Relationships of Al- alloyed Medium Manganese Steels
Modeling and Experimental Validation of the Precipitation Kinetics of Vanadium Carbide in Austenitic Steel
Modelling of Precipitation and Grain Growth in Ti-Nb Microalloyed Steels
Relationship between Microstructure and Tensile Properties on High Strength Medium Carbon Mo-Nb-B Microalloyed Q/Q&T Steels
Silicide Strengthened Ferritic Alloy - A New Method of Wear Protection in Nuclear Environments
Strain Aging Embrittlement of Structural Steel
Study of the Effect of Accumulative Angular Drawing Process Conditions on Grain Refinement in Selected Stainless Steel Grade
Triple Nano-precipitate Strengthened Austenitic Steel

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