Effect of continuous annealing process on the mechanical properties of cold-rolled low silicon HSLA steel sheets
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摘要: 利用多功能連續退火模擬器Multipas對屈服強度為380MPa的低硅型冷軋低合金高強鋼板連續退火生產工藝進行了模擬,研究了在820,800,780℃三種不同退火溫度和60,120,160m·min-1三種不同退火速度下,連退工藝對冷軋低合金高強鋼板組織、力學性能的影響.結果表明,在不同的退火溫度、退火速度下鋼板退火組織的晶粒度基本相同,采用較低的退火溫度和較高的退火速度時,可獲得較好的強化效果.同時指出,在較高的連續退火溫度下,退火速度對力學性能的影響較為顯著.Abstract: A multifunction continuous annealing simulator (Multipas) was employed to numerically simulate the continuous annealing process for a low silicon HSLA steel sheet of 380 MPa grade in yield strength. The effects of annealing process on the microstructure and mechanical properties of low silicon HSLA steel were studied at annealing temperatures of 820, 800, and 780℃; and annealing speeds of 60, 120, and 160 m·min-1. The result indicates that the grain sizes of microstructure are similar at different annealing temperatures and different annealing speeds. The higher strength of low silicon HSLA steel can be gained when it is annealed at a lower annealing temperature and a higher annealing speed. The annealing speed affects the mechanical properties more significantly when the annealing temperature is in a higher level.
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