Influence factors on solid-solution of carbonitride of niobium in steel
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摘要: 鈮的析出和固溶對鑄坯質量好壞和鋼材性能優異具有非常明顯的影響,通過計算鋼中碳含量、氮含量、鈮含量和溫度對碳氮化鈮固溶的影響,發現鋼中碳、氮、鈮含量增加,碳氮化鈮的全固溶溫度升高;氮含量增加,NbN的有效活度增加,固溶鈮含量下降;鈮含量增加,在溫度為800~1100℃范圍內,氮化鈮的含量增加;碳含量增加,鋼中固溶鈮降低和鈮的化合物增加.隨溫度升高,固溶鈮與總鈮含量的比值增加,二者比值位于30%~70%之間.Abstract: Effect of precipitation and solid-solution on slab's quality and product's mechanical properties is very important. Based on studying effect of carbon content, nitride content, niobium content and temperature on solid-solution of carbonitride, the following laws were obtained. Firstly, solid-solution temperature will rise when content of carbon, nitride and niobium increases. Secondly, effective activity of NbN goes upwards with increases of content of nitride, and amount of solid-solution of niobium reduces. Quantity of NbN rises with increase of content of niobium from 800℃ to 1 100℃. The same laws can also be used for effect of carbon content. Niobium ratio between solid-solution amount and total content rises with increase of temperature, the ratio value lies from 30% to 70%.
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Key words:
- carbonitride /
- solid-solution /
- niobium /
- precipitatio
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