Baosteel's first batch of secondary cold-rolled shadow mask strip products with a thickness of 0.15 mm has been successfully applied to trial production in relevant enterprises. The product composition and performance indicators have reached the relevant technical standards, marking the product has filled The blank of the shadow mask strip with a typical thickness of 0.17 mm or less in the country.
It is understood that the shadow mask strip is one of the most important metal materials in color picture tubes. The production process is very complicated and extremely demanding, and it is known as the "arts and crafts" in steel products. At present, China produces 80 million shadow masks per year, and the annual demand for shadow mask strips is more than 40,000 tons, accounting for more than 50% of the total number of shadow mask strips used in electronic tube tubes worldwide. It has become the world's largest shadow mask. Strip consumer countries. Since only a few steel companies in Japan and Germany were able to mass produce, China's shadow mask strip market has long been monopolized by imported products, resulting in high prices.
Since 2001, Baosteel has formed a research project group to tackle the production technology of shadow mask strip steel, and successfully developed the shadow mask strip steel by one cold rolling method. So far, more than ten specifications have been successfully tested. In the second quarter of 2004, the 1420 unit of Baosteel Branch began to produce a cold-rolled shadow mask strip in small batches. The market responded well and demand was strong. However, due to technical constraints, Baosteel cannot produce shadow mask strips with typical specifications below 0.17 mm. Domestic stencil companies can only import a large number of products from abroad. In response to this situation, Baosteel also implemented a research project on secondary cold-rolled shadow mask strip in June last year. After this, Baosteel has overcome the technical difficulties of making difficult process parameters, high chemical composition control precision, plate thickness thickness accuracy and surface quality requirements, which laid the foundation for the successful trial production. In September last year, Baosteel successfully completed the trial production of the first batch of 0.15 mm secondary cold-rolled shadow mask strip, and in November it sent the batch to Xianyang Rainbow Electronic Stencil Factory and Nanjing Electronic Stencil Technology Co., Ltd. The company conducts production trial operation.
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