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对连铸板坯在炉停留时间和热轧中厚板超声波探伤质量之间的关系进行了研究.结果表明:220mm厚连铸板坯在炉停留时间低于3h会导致中厚板超声波探伤合格率显著降低;延长铸坯在炉停留时间能够有效提高中厚板的超声波探伤合格率;中厚板中引起超声波探伤不合的缺陷是珠光体带中的微裂纹;减弱连铸板坯的中心线偏析能够有效提高中厚板的探伤质量.
The relationship between the residence time of continuous casting slab in the furnace and the ultrasonic flaw detection quality of hot rolled plate was studied.The results showed that the residence time of 220mm continuous slab in the furnace below 3h would result in the ultrasonic flaw detection Prolonging the slab residence time in the furnace can effectively improve the qualified rate of ultrasonic flaw detection in medium and heavy plates; the defect caused by the ultrasonic flaw detection in the medium and heavy plate is the micro-cracks in the pearlite zone; and weaken the center line of the continuous casting slab Segregation can effectively improve the quality inspection plate.