摘要
为进一步研究Teflon涂层厚度对低温流动淬火特性的影响,对316L不锈钢管、Teflon涂层管和Teflon-PTFE塑料管进行了不同流量下的液氮流动淬火实验研究。结果表明,塑料管和涂层管通过提高LFP温度,淬火时间较光管大幅缩短。涂层管和塑料管在不同流量下的LFP温度均有良好的一致性,但由于塑料管热阻较大,阻碍了管壁热量的传递,塑料管的CHF远小于涂层管。因此,涂层管同时具备高LFP温度和高CHF的特点,使其拥有了最高的淬火效率,可大幅减少淬火过程的低温流体消耗量。
In the present study, liquid nitrogen flow quenching experiments under different flow rates were carried out on 316 L stainless steel tube, Teflon coating tube and Teflon-PTFE plastic tube for comparison. The results show that the quenching times of plastic tube and Teflon coating tube are significantly shorter than that of stainless steel tube by increasing LFP temperature, meanwhile, the LFP temperatures of Teflon coating tube and plastic tube are in good consistency under different flow rates. The CHF of plastic tube is much smaller than that of Teflon coating tube, because plastic tube has large thermal resistance, hindering the heat transfer. Therefore, Teflon coating tube shows the characteristics of high LFP temperature and high CHF simultaneously, which results in the highest quenching efficiency and can greatly reduce the cryogenic fluid consumption in the quenching process.
作者
宋旭东
程诚
张鹏
Song Xudong;Cheng Cheng;Zhang Peng(Institute of Refrigeration and Cryogenics,Shanghai Jiao Tong University,Shanghai 200240,China;Shanghai Institute of Space Propulsion,Shanghai 201112,China)
出处
《低温与超导》
CAS
北大核心
2022年第10期26-32,共7页
Cryogenics and Superconductivity
基金
国家自然科学基金(51976117)
上海市科学技术委员会项目(17DZ2280800)资助。
