Research Of The Cold-rolled Composite Technics Of The Bimetal Products Which Thickness Is Not Less Than2.0mm

Thermal bimetal is two or more properties with a suitable metal or other material composed of a composite material.Generally made of strips or sheet, as per layer in each group different coefficients of thermal expansion, when the temperature changes, the curvature of this composite material will change. As a functional material,widely used in thermal bi-metal appliances, and electrical field instrumentation industry. Seen in daily life refrigerators,air conditioners, rice cookers, etc. in the given temperature range, automatic operation. This is the thermal bimetallic element in the implementation of control.Because of its simple structure, low cost, making convenient and reliable action, is the widespread use of automatic control elements.From the18th century and the thermal bimetal first application of the invention, its history, more than two hundred years. Solid phase in which the production of heat with the invention of double metal is undoubtedly a milestone. The production of high efficiency, cost savings, improve quality and avoid the common method of production arising from the spread between the metal layer, mutual melting and hot rolling when combined adverse effects caused by heat, is hot on the double-metal-binding process a breakthrough, it appears, for the thermal development of new varieties of dual-metal, especially for resistance-type thermal bimetal provides a strong means of production, using this method, can produce all varieties of hot bi-metal, and production of ten five or more composite materials.I plant formerly known as Shanghai Iron and Steel Institute, is the first bi-metal thermal to carry out development and production manufacturers.≤1.5mm thickness specifications for dual-metal products, through years of process optimization, the cold is already very mature and complex production process. But for more than1.5mm dual standard metal products, due to limitations of equipment condition, never been technology research and production.≥2.0mm for the finished product specifications and thus the double metal products, such as the present, I plant the production of3.0mm,2.5mm and other specifications of the color picture tube with a composite double metal CIY double metal strip, has been produced by thermal recovery method, that is, first through the heat recovery Method of rolling metal strip blank double, and then processed into finished products through the cold-rolled strip, the product consistency in tolerance, surface quality and production efficiency, there is always the larger issue that must be replaced immediately to seek new technology.By product specifications≥2.0mm cold-rolled dual-metal composite technology of products, from product specifications, group element layer thickness ratio, solid phase sandwich rolling process parameters (including:clearing brush current, rolling speed, the former tension and lubrication conditions, etc.),heat treatment group element layer blanks, complex heat treatment after sintering with blanks, and finished the system of cold rolling technology test in many areas, and achieved a great deal of field data combined with actual production data analysis to determine the more complete set of operational processes and have a certain system.Conventional hot compounding process, process more complex processing, quality difficult to control, usually from the ingot to the hot billet to be more than a month long production cycle; and adoption of new production technology to develop multiple lines of cold is much simple and easy to quality control, usually from the ingot to the hot-rolled billet no more than a week, production efficiency has improved significantly. Integrated cold production process, using cold production of CIY bimetallic complex in less than one-third of heat recovery method is obviously much shorter production cycle, production costs are significantly reduced. At the same time, the use of complex technology, the CIY cold bimetallic become useful in all processes were significantly higher than that of using thermal technology, the CIY complex double metal complex individual process using cold-rolled composite production compared to the traditional production of the finished product rate increased by nearly18%fully reflects the complex process of cold superiority, to the study, and achieved good economic and social benefits, has some promotional value.