Abstract Recently, it was learned from the Technical Quality Department of Qiangang Company that after more than one year of efforts, Qiangang has successfully produced high carbon steel for saw blades of four steel grades: 30CrMo, 50Mn2V, 65Mn and 75Cr, of which 65Mn and 75Cr have been Achieve batchization...
Recently, it was learned from the Technical Quality Department of Qiangang Company that after more than a year of hard work, Qiangang has successfully produced high carbon steel for saw blades of four steel grades: 30CrMo, 50Mn2V, 65Mn and 75Cr, of which 65Mn and 75Cr have been realized. Batch production, and enter key customers in the industry. Saw blade steel is widely used in mining, metallurgy, building materials and other industries. It has strict requirements on the purity of steel, the surface quality of steel plate, dimensional accuracy and processing performance. At present, only a few steel mills in China can meet high-end users. demand. According to the technical quality department, the quality of saw blade steel depends heavily on the production equipment and technology. It is difficult to develop and produce. Especially for 75Cr steel, high purity, precise and narrow composition control of molten steel must be realized. For continuous casting process and hot rolling process Online processing has very high requirements, which can reflect the advanced level of equipment and process technology of steel mills.
At present, Baosteel, Angang and Valin have almost monopolized the saw blade steel market. With the continued sluggishness of the steel market, companies such as Taigang and Tangshan have also entered this market. As a latecomer, in order to quickly establish the brand of Qiangang Company and occupy the market, while the company is tackling the problem, the company's technical personnel, sales company personnel and downstream customers will be fully integrated, and the demand for saw blade steel and the supply situation of steel mills will be investigated in detail. . From the perspective of visiting companies and industry analysis, the demand for saw blade steel is relatively stable in China, and the domestic market demand is more than 100,000 tons per year. At the same time, the concentration of downstream users is high. The top four saw blade manufacturers in China use about 80,000 tons of saw blade steel each year, and two of them are located in Tangshan City, which is not only conducive to organizational production, but also conducive to the organization of product sales. In the process of communication, the technicians not only fully grasp the customer's needs in terms of product quality, order delivery, etc., but also provide customers with a comprehensive understanding of the equipment, process, research and development strength and product quality of Qiangang, and enhance the confidence of cooperation.
With the support of Shougang Technology Research Institute and the sales company, the saw blade steel research team quickly carried out the industrial trial production and mass production of 65Mn. By tracking the customer's usage, the dimensions, surface, performance and other indicators fully meet the customer requirements. In the process of visiting customers, it is understood that 75Cr saw blade steel has a large demand in the future, and it is also the most difficult type of saw blade steel. So in April last year, Qiangang started the first round of trial production of steel for 75Cr saw blades. At the beginning of the research and development, the continuous casting billet appeared cracks. The first batch of 75Cr steel flat panel appeared “crashing†defects when the customer tried to cut the material, which seriously affected the subsequent processing. In order to solve the problem as soon as possible, the technicians independently innovated, closely tracked each production, adjusted the key process, and gradually solved the problems of slab longitudinal cracking and heat treatment performance, and met the customer requirements. At the same time, because the saw blade manufacturer purchases raw materials from the saw blade orders every month, there are characteristics of scattered specifications and small quantities, which leads to difficulties in production organization and increased short casting times. In order to meet customer requirements and reduce production costs, Qiangang has adopted a method of establishing active inventory to merge and produce a number of customers with steel specifications.
As of March, Qiangang has produced and sold 4,193 tons of saw blade steel. In order to expand the steel grade for the saw blade steel series, the trial production of 50Mn2V and 30CrMo has been completed. The technical staff said that the development goal of saw blade steel is to create a "double high" boutique, continue to expand the specifications, and strive to close to the highest level in terms of plate shape, surface quality, heat treatment performance and other indicators.
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