CAJ | 학술논문

采用一种工业生产的Nb-V-Ti复合微合金钢在Gleeble热模拟试验机上研究了精轧后冷却速度（1～30℃／s）和卷取温度（650～550℃）对铁素体中析出的影响。研究结果表明，在1～5℃／s的冷却速度下观察到了10～20nm的相间析出。在650℃和600℃卷取时，随着轧后冷却速度的增加，10nm以下的一般析出数量增多而尺寸减小；而在550℃卷取时，当冷却速度为30℃／s时10nm以下的析出数量急剧减少，这可能与较慢析出动力学有关。在相同的轧后冷却速度下，当卷取温度降低时，一般析出的体积分数增加而尺寸减小，这与析出的热力学驱动力增加有关。
채용일충공업생산적Nb-V-Ti복합미합금강재Gleeble열모의시험궤상연구료정알후냉각속도（1～30℃／s）화권취온도（650～550℃）대철소체중석출적영향。연구결과표명，재1～5℃／s적냉각속도하관찰도료10～20nm적상간석출。재650℃화600℃권취시，수착알후냉각속도적증가，10nm이하적일반석출수량증다이척촌감소；이재550℃권취시，당냉각속도위30℃／s시10nm이하적석출수량급극감소，저가능여교만석출동역학유관。재상동적알후냉각속도하，당권취온도강저시，일반석출적체적분수증가이척촌감소，저여석출적열역학구동력증가유관。
The effect of cooling rate（ 1 -30 ℃/s） and coiling temperature （650 -550 ℃ ） on the fine precipitates in ferrite was studied on Gleeble thermo-mechanical simulator with a commercial Nb-V-Ti microalloyed complex strip steel. The results shown that an inter-phase precipitation of 10 - 20 nm was observed under condition of 1 - 5 ℃/s cooling rate. The general precipitates under 10 nm increase in the number, but decrease in size during coiling at 650 ℃ and 600 ℃ with increasing cooling rate after hot rolling, and the number of precipitation less than 10 nm drastically reduce during coiling at 550 ℃ in 30 ℃/s cooling rate, which may be related to the slow precipitation kinetics. In the same cooling rate after hot roiling, when the coiling temperature is lowered, the general precipitates increase in-the volume fraction, but decrease in size, which may be related to the increased thermodynamic driving force.