摘要
研究了快速球化退火的奥氏体化温度、保温时间以及双相区冷却速度对GCr15钢残留碳化物粒子的数量和分布形态的影响。根据"离异共析"的原理和奥氏体状态对残留碳化物粒子影响的研究结果,制定了GCr15钢的快速球化退火工艺。试验表明,GCr15钢经790℃×10 min奥氏体化,炉冷至720℃等温60 min炉冷快速球化退火后,其球化组织为2.5级,总退火时间为3.5 h,明显优于传统球化退火工艺。
Effect of austenitizing temperature, time at the temperature and cooling rate in two-phase region of quick spheroidizing process on both amount and distribution of residual carbide particles in GCrl5 steel was investigated. A new quick spheroidizing process was worked out on the basis of DET（divorced eutectoid transformation） and the effect of austenite state on residual carbide particles for GCrl5 steel. The experiment shows that after being quick sphcroidizd by austenitizing at 790 ℃ for 10 min, followed by furnace cooling to 720℃ and holding for 60min, then furnace cooling, the spheroidizd microstructure number is 2.5, and the total spheroidizing cycle is 3.5 h, being appreciably superior to the traditional spheroidizing process.
出处
《热处理》
CAS
2014年第1期26-30,共5页
Heat Treatment
