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在Gleeble-3800热模拟试验机上,通过2次压缩实验研究了不同变形工艺下X65管线钢的软化行为,分析了变形温度、间隔时间、相对变形量等因素对静态再结晶行为的影响规律。结果表明:当变形间隔停留时间为1~10 s时,在变形温度为1050℃时,软化比值达到81.3%,可认为是完全再结晶区;在变形温度为930℃时,软化比均低于30%,只产生了静态回复,没有静态再结晶行为。运用这些规律可以确定粗轧的终轧和精轧的开轧温度,并且能为分区控制轧制提供理论依据。
On the Gleeble-3800 thermal simulator, the softening behavior of X65 pipeline steel under different deformation processes was studied by two compression experiments. The influence of deformation temperature, interval time and relative deformation on the static recrystallization behavior was analyzed. The results show that when the residence time is 1 ~ 10 s, the softening ratio reaches 81.3% when the deformation temperature is 1050 ℃, which is considered as a complete recrystallization zone. When the deformation temperature is 930 ℃, the softening ratios are all lower than 30%, only produced a static response, there is no static recrystallization behavior. The use of these rules can determine the roughing rolling and finish rolling of the rolling temperature, and can provide a theoretical basis for the sub-controlled rolling.