Effect of annealing process on microstructure and properties of 2Cr12Ni4Mo3VNbN blade steel
In order to solve the problem of high annealing hardness of 2Cr12Ni4Mo3VNbN industrial bar,the effects of different annealing processes on the microstructure and hardness of 2Cr12Ni4Mo3VNbN blade steel were systematically studied.The results show that compared with two-phase zone heating annealing and incomplete annealing,complete annealing has better annealing effect,the hardness is the lowest after annealing,and the hardness can be further reduced by furnace cooling.The two-stage annealing and three-stage annealing can improve structure uniformity and significantly reduce the hardness.The multi-stage annealing process is better than the one-stage annealing and two-stage annealing with regards to hardness reduction through annealing.
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