Numerical study of creep effect on purging plug performance under cyclic service
Numerical study of creep effect on purging plug performance under cyclic service
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DOI：
10.1007/s42243-022-00749-9
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发表时间：
2022-02
影响因子：
2.5
通讯作者：
Fang-guan Tan;S. Jin;Z. He;Xiong Liang;Ya-wei Li;Jing Li
中科院分区：
文献类型：
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作者：
Fang-guan Tan;S. Jin;Z. He;Xiong Liang;Ya-wei Li;Jing Li
透气砖的使用寿命是决定整个钢包停机时间和使用效率的根本因素之一。因此，研究了吹扫塞的蠕变行为，以确定可能的失效机制。首先，根据蠕变试验结果，反演了Norton-Bailey应变硬化准则的蠕变参数。采用Norton-Bailey应变硬化准则，采用热-固耦合模型预测了透气砖的蠕变行为。计算结果表明，由于预热温度低于钢水温度，在第一个使用周期后，透气砖的温度呈周期变化趋势。此外，蠕变应变强度以分层形式的分布也可能有助于在使用中的吹扫塞端部的逐渐剥落。此外，狭缝周围的蠕变应变集中可能是吹扫塞堵塞的原因。
The service life of the purging plug is one of the fundamental factors that determine the downtime and usage efficiency of the whole ladle. The creep behaviour of the purging plug was thus investigated to identify the possible failure mechanism. At first, the creep parameters of the Norton–Bailey strain hardening rule were inversely identified via the results of the creep test. Then, the thermal-solid coupling model approach was employed to predict the creep behaviour of the purging plug, in which the Norton–Bailey strain hardening rule was applied. The numerical results show that the temperature of the purging plug presents a cyclic trend after the first service period since the preheating temperature is lower than the temperature of molten steel. Furthermore, the distribution of the creep strain intensity in a layered form could also contribute to a gradual spalling of the purging plug end in service. Besides, the creep strain concentration around the slit can be responsible for the clogging of the purging plug.