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Effect of Intercritical Annealing on Fracture Behaviour of 10GN2MFA Grade Steel

机译：跨临界退火对10GN2MFA级钢断裂行为的影响

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The effect of intercritical annealing of 10GN2MFA grade steel on mechanical properties and fracture behaviour is studied in this paper. This type of low alloy banitic steel is usually used for production of collector bodies of steam generators for nuclear power station of VVER type. This article is focused on optimalization of fundamental utility properties and heat treatment process of the steel under investigation to increase toughness and critical temperature of brittleness. An intecritical annealing has been chosen as a useful tool for such improvement. Mechanical properties and impact notch toughness values after the intercritical annealing and conventional heat treatment regimes are compared. Effect of simulation of stress relieving including minimum and maximum allowable heating regimes on fracture properties is studied too. Intercritical annealing was added to the conventional quality heat treatment process, between quenching (normalizing) and tempering. The application of intercritical annealing improved the impact toughness significantly, an increase in the upper shelf energy and a decrease in transition temperature of steel under investigation.
机译：本文研究了10GN2MFA级钢对10GN2MFA级钢对机械性能和断裂行为的影响。这种类型的低合金障碍钢通常用于生产VVER型核电站蒸汽发生器的集电极体。本文专注于在调查中优化钢的基本实用性和热处理过程，以提高脆性的韧性和临界温度。被选中作为这种改进的有用工具。在临界退火和常规热处理制度比较后机械性能和冲击韧性值。研究了对压力缓解的效果，包括最小和最大允许的骨折性能的易于加热制度。将跨临界退火加入到常规质量热处理过程中，在淬火（归一化）和回火之间。跨临界退火的应用显着改善了冲击韧性，在调查中增加了上搁板能量和钢的过渡温度降低。

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