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高强度低合金钢（ＨＳＬＡ）在热轧过程中控制其微合金元素（Ｎｂ－Ｔｉ－Ｖ）的析出，对确保ＨＳＬＡ钢机械性能的再现性和均匀性十分重要。本文就热轧中工艺本数和钢的化学成分对析出动力的影响，利用局部电解法（ＳＥＤ）进行了定量的研究。对热轧过程中在奥氏体中与在铁素体中的非等温和等温析出动力进行了比较和研究。相变期间或相变之后的重要差别在于铁素体中形成了连贯和不连贯的析出物。连贯析出动力在高温下的铁素体中表现得很快（借助于硬度的测量研究）。为了避免出现连贯析出，在终轧之后的输出辊道上的冷却速率必须大于２０℃／ｓ。
The control of the precipitation of microalloyed elements (Nb-Ti-V) during high-strength low alloyed steel (HSLA) is important for ensuring the reproducibility and uniformity of the mechanical properties of HSLA steels. In this paper, the number of hot-rolled process and the chemical composition of steel on precipitation power, the use of local electrolysis (SED) conducted a quantitative study. The non-isothermal and isothermal precipitation kinetics in austenite and ferrite during hot rolling were compared and studied. An important difference during or after the phase change is the formation of coherent and non-continuous precipitates in the ferrite. Coherent precipitating power appears fast in ferrite at high temperatures (with the aid of hardness measurement studies). In order to avoid the occurrence of coherent precipitation, the cooling rate on the exit rollers after the final rolling must be greater than 20 ° C / s.