What is the effect of tempering time on the performance of 45 Quenched And Tempered Steel

45 Quenched And Tempered Steel is 45 quenched and tempered steel. The tempering time has a significant effect on its performance, as follows:
Hardness: Generally speaking, the hardness of 45 quenched and tempered steel will gradually decrease with the extension of tempering time. This is because during the tempering process, the martensite structure in the steel will decompose to form tempered troostite and other structures, which will reduce the hardness of the steel. If the tempering time is too short, the martensite will not decompose sufficiently, the hardness of the steel will be high, and the toughness will be poor.
Strength: The effect of tempering time on strength is similar to that of hardness. Properly extending the tempering time is conducive to eliminating the internal stress in the steel, making the structure more stable, the strength will decrease, but the toughness will be improved. However, if the tempering time is too long, it will lead to the aggregation of alloy elements and the growth of carbides, which will significantly reduce the strength of the steel.
Toughness: The effect of tempering time on toughness is more obvious. As the tempering time increases, the toughness of the steel will gradually increase. This is because during the tempering process, the supersaturated carbon in the martensite gradually precipitates, the lattice distortion is reduced, and the internal stress is released, thereby improving the toughness of the steel. However, when the tempering time reaches a certain extent, the improvement in toughness will gradually decrease.
In summary, the tempering time is one of the important factors affecting the performance of 45 Quenched And Tempered Steel. In actual production, it is necessary to reasonably control the tempering time according to specific performance requirements to obtain the best comprehensive performance.
If you want to know how the tempering time of 45 Quenched And Tempered Steel affects its performance, you can consult our customer service staff, we will serve you wholeheartedly 24 hours a day!