C10200 Copper Sheet China temperature measurement results: With the rapid development of the automotive industry, the market competition for copper sheets is becoming more and more fierce. Customers have higher and higher requirements for the perceived quality of copper sheets. The surface quality of exposed solder joints is the focus of attention of customers, in order to make the appearance of the car body The solder joints are flat and beautiful, and it is usually necessary to set process gasket protection at the corresponding position of the fixture. The most commonly used process gasket is copper plate. If the use of copper plates lacks standardized guidance, it is easy to cause fixture positioning failure, and similar failure modes should be avoided.
High-quality C10200 Copper Sheet China is the development direction of my country's manufacturing. Thin slab continuous casting and rolling products have the characteristics of fast solidification, fine grains, and thin thickness. They have obvious advantages in some high value-added products and manufacturing costs. Therefore, the use of thin slab continuous casting and rolling process to produce high-quality copper plates is a new way to achieve green steel manufacturing. Relying on the unique advantages of low cost and process technology, CSP has transformed its products from ordinary steel to variety steel. High value-added steel such as silicon steel, high-strength automotive steel, weathering steel, medium and high carbon steel has gradually become the main varieties of the production line. However, high quality In the process of steel continuous casting, crack defects and band structure defects caused by segregation of alloying elements are particularly prominent. They have become the main restrictive link in the adjustment of the product line variety structure and the stability of the forward movement.
In view of the uneven distribution of elements and the band structure of the C10200 Copper Sheet China hot-rolled sheet, mechanism analysis and segregation control technology research have been carried out. The results show that the intergranular segregation of the cast slab is Inheritance to the hot-rolled sheet after elongation is the main reason for the formation of the band structure. The greater the cooling strength and the faster the solidification speed, the more conducive to segregation control. When the cooling rate is greater than 5K/s, the intergranular segregation can be obtained. Effective control; using low superheat, high drawing speed, enhanced cooling in the front section of the secondary cooling, strengthening the billet shell, slowing down the cooling in the rear section, and restraining the crystal through the method, the continuous casting process of medium and high carbon steel is optimized. The field test results show that: The end position of the liquid phase of the slab is extended from 5.85m to 7.9m, the ratio of columnar crystals is significantly reduced, about 15% of equiaxed crystals appear in the center, the segregation ratio of the center of the slab is reduced from 1.08 to 1.04, and the slab is 1/4 The intercrystalline segregation at the thickness is significantly reduced, the product band rating is ≤1 grade, and the problem of band structure exceeding the standard basically disappears.
Through the actual field test of the mold copper plate temperature, the temperature measurement results, the temperature change curve and the heat flux density are analyzed. The overall temperature and heat flux distribution are in the shape of "M", the temperature near the center line of the copper plate is relatively low, and there is a high temperature zone at 1/4 of the width on both sides. The temperature of the copper plate at the first row of thermocouples near the meniscus is relatively high. The main cause of longitudinal cracks in the center of the blank.
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