CAJ | 학술논문

采用热处理实验方法,同时结合热模拟压缩和热模拟拉伸试验,研究了热处理对奥氏体不锈钢00Cr24Ni13铸坯高温热塑性的影响。实验结果表明：热处理能够明显改变实验钢铸坯中δ铁素体的形貌；经1200℃保温3 h空冷后,原始铸坯中存在的大面积连续网状δ铁素体完全转变为弥散分布的细小颗粒状组织。具有颗粒状δ铁素体的热处理试样与热处理前相比,不同温度压缩时的变形抗力略有增加,但并没有急剧恶化；热模拟抗拉强度基本保持不变；相同温度下的断面收缩率( Z)显著提高,其中Z≥60%的温度区间由1150~1280℃扩展为1050~1300℃,高塑性(Z≥80%)温度范围在150℃左右(1150~1300℃)。
채용열처리실험방법,동시결합열모의압축화열모의랍신시험,연구료열처리대오씨체불수강00Cr24Ni13주배고온열소성적영향。실험결과표명：열처리능구명현개변실험강주배중δ철소체적형모；경1200℃보온3 h공랭후,원시주배중존재적대면적련속망상δ철소체완전전변위미산분포적세소과립상조직。구유과립상δ철소체적열처리시양여열처리전상비,불동온도압축시적변형항력략유증가,단병몰유급극악화；열모의항랍강도기본보지불변；상동온도하적단면수축솔( Z)현저제고,기중Z≥60%적온도구간유1150~1280℃확전위1050~1300℃,고소성(Z≥80%)온도범위재150℃좌우(1150~1300℃)。
The effect of heat treatment on the high temperature ductility of 00Cr24Ni13 austenitic stainless steel casting billets was investigated by heat treatment experiment, thermo-compression test and thermal tensile test. The result showed thatδferrite morpholo-gy in the casting billet could be significantly changed through the heat treatment process. After air cooling from 1200℃ for 3 h, large area of continuous reticularδferrite in the casting billet completely changed into dispersed granular phases. Compared with the casting billet before heat treatment, heat-treated samples which are composed of granularδferrite had a higher value of deformation resistance at different compression temperatures, but there was no sharp deterioration in deformation resistance, the thermal simulation tensile strength remained almost the same and the reduction of area ( Z) at the same temperature increased obviously. The temperature region of Z≥60% extended from 1150-1280℃ to 1050-1300℃, and the high plasticity ( Z≥80%) range is about 150℃ ( 1150-1300℃).