回火温度对高强高韧钢组织及性能的影响Effects of Tempering Temperature on the Microstructures and Properties of Steel with High Strength and High Tenacity

After series of tests, the effects of tempering temperature on the microstructures and properties of steel with high strength and high tenacity during tempering were discussed. The result shows that: various performance indicators show little change in the temperature range of 560˚C - 580˚C; with the increase of tempering temperature, strength and hardness decrease and toughness increases in the temperature range 580˚C - 670˚C. Reason Analysis: due to the combined action of Sorbite and Carbide, the tensile strength and yield strength first increase and then decrease, on the contrary, the toughness descends first and then increases.

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