Q-P process significantly improve crack initiation and propagation resistance of 300M steel, and extend the uniform plastic deformation stage of the material, and finally put off the necking creation.
Q-P工艺明显提高了300M钢抗裂纹形成和扩展的能力，延长了材料的均匀塑形变形阶段，推迟缩颈发生。
Q-P process significantly improve crack initiation and propagation resistance of 300M steel, and extend the uniform plastic deformation stage of the material, and finally put off the necking creation.
Q-P工艺明显提高了300M钢抗裂纹形成和扩展的能力，延长了材料的均匀塑形变形阶段，推迟缩颈发生。
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