Research on Structural Inheritance Characteristic and the Related Normalizing Elimination Process for 300M Steel

Da Bo Liu; Jun Wei Liu; Shi Qiang Lu

doi:10.4028/www.scientific.net/AMR.750-752.365

Paper Titles

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Characterization of Core-Shell Structure Palygorskite Modified by Nano-CaCO₃ (PnC) Composite Particles
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Fabrication of Micro-Structural ZnO Crystal and the Concentration Fields of the CVD Reactor
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Study on Bainitic Microstructure under Low Austempering Temperature and its Wear Resistance of Low-Alloy High-Carbon Steel
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Research on Structural Inheritance Characteristic and the Related Normalizing Elimination Process for 300M Steel
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Research on the Reverse Loading Hardening Model of the X80 Pipeline Steel
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Physical Simulation of Inclusions Removal in 180t RH Degasser
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Phase Transformation Behaviors of Nb-V-Ti Microalloyed Pipeline Steel X70
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Study on Process of SPHC Steel Solidification
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Research on Structural Inheritance Characteristic and the Related Normalizing Elimination Process for 300M Steel

Abstract:

The characteristic of structural inheritance for 300M steel was explored and the eliminating effect of normalization was investigated. Then, both the first and secondary normalization process was optimized by comparing eliminate effect. It is known that obvious characteristic of structural inheritance can be shown with the condition of 810°C-840°C×30min/OC after over-heated treatment. The first normalization process whose condition is 950°C~1100°C×2.5h/air cooling has the good effect on eliminating structural inheritance. While, the secondary normalization process whose condition is 960°C~1060°C×2h/air cooling+925°C×2.5h/air cooling owns the better effect on eliminating structural inheritance.