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基于膜态沸腾传热的机理,针对工程中常用的Q235线材,以ANSYS为平台,建立合理的温度场模型,研究Q235线材在不同温度冷却水中的冷却过程,以实现对吐丝机后线材冷却工艺的优化。通过实验,观察在浸水冷却环境下,金属的力学性能相比于空冷条件下是否存在明显提高。数值模拟表明:在100℃冷却水中,直径为8 mm的Q235线材从950℃冷却至400℃的需要的冷却时间为26 s,而在80、60、40以及20℃的冷却水中,该时间分别为25、25、24和24 s。相比于空气自然冷却冷却,冷却时间的到得了大幅度缩减。在材料性能方面,通过拉伸试验可以发现,在水冷环境下,线材的均匀性、以及抗拉性能均得到了显著提高。当冷却水温度为80℃时,最有利于线材获得提高强度的组织结构,线材的屈服强度和抗拉强度达到最大值。
Based on the mechanism of membrane boiling heat transfer, aiming at the common Q235 wire in engineering and ANSYS platform, a reasonable temperature field model is established to study the cooling process of Q235 wire in different temperature cooling water, Process optimization. Through experiments, it is observed whether there is a significant improvement in the mechanical properties of the metal compared to the air-cooled condition in a submerged cooling environment. Numerical simulations show that the cooling time required for cooling Q235 wire with a diameter of 8 mm from 950 ℃ to 400 ℃ in cooling water at 100 ℃ is 26 s, while in cooling water at 80, 60, 40 and 20 ℃, respectively 25, 25, 24 and 24 s. Compared to the natural cooling air cooling, cooling time has been greatly reduced. In the material properties, through the tensile test can be found in the water-cooled environment, the wire uniformity, and tensile properties have been significantly improved. When the cooling water temperature is 80 ℃, the most conducive to the wire to obtain increased strength of the organizational structure, the wire yield strength and tensile strength to a maximum.