Increased yield, monthly production record high...... Cold rolling operation is in action10.16

The cold rolling plant actively and Baosteel outstanding base for a comprehensive standard, around the pickling high-price order structure optimization, home appliances and galvanized fingerprint resistant products, automotive exterior plate and other key product structure efficiency and other task indicators, the ultimate quality improvement to expand the market, accelerate the cold rolling operation of the physical operation. From January to July, the yield of cold-rolled galvanized advanced high-strength steel increased by 3% year-on-year, and pickling and acid rolling hit a new monthly production record, and the effect was remarkable.

Create value through collaboration

Cold rolling plant around the value creation to improve the pain points, depth digging to improve quality and efficiency synergistic points, fully with the professional advantages and technical strength of Baosteel, Baosteel welding machine experts are invited to the site to help solve the problem of cold rolling acid rolling machine rewelding rate of the problem, so that the performance of acid rolling laser welding machine has been greatly improved, the speed of weld overstretch correction machine has increased by 25%, and the quality of weld has been effectively improved. Effectively reduce the rewelding rate, help the production line to improve quality and increase production efficiency.
Under the guidance of standardized inspection experts, Baosteel process inspection system has been fully introduced to effectively solve 6 problems of oil film passivation, oil coating amount, zinc layer control inequality generated on site, and more than 30 new problems affecting product quality have been found in equipment operation, roll system use, steel coil transportation, etc., which have been solved in a closed loop, effectively promoting the company's cold rolling product quality to achieve further improvement.

Develop the market with quality

The cold rolling mill proposed three parts: quality ability improvement, quality problem improvement and quality routing management. By carrying out quality defect training, we have carried out research on issues such as galvanized 590DH hot rolling time in the furnace, and continued to improve quality assurance capabilities and customer service capabilities. Aiming at the high-end market, combined with the characteristics of small order batches and mixed specifications, we have innovatively set up 31 orders of three groups, matching technical service engineers at the manufacturing end and research and development end, facing customers, improving market perception and service satisfaction, and striving to meet customer needs with excellent quality.
Since the beginning of this year, the quality process control of cold rolling units has been stable, and it has successfully passed the 2024 QESN four system certification and measurement supervision system audit; The waste rate of cold rolled products decreased and the spot rate index continued to improve. The newly developed domestic automotive galvanized highest stamping grade IF steel DX57D+Z has further improved the market influence of Shan Steel products.

Improve quality and enhance capability through innovation

The factory gives full play to the important supporting role of scientific and technological innovation, and vigorously carries out equipment transformation and process optimization around solving quality defects such as zinc slag, leakage plating and reinforcement of automobile plates. The pre-oxidation control model is innovatively established to avoid alloy precipitation, improve the plating ability of strip steel, and optimize the dew point process window of the furnace nose to prevent secondary oxidation of high-strength steel, and effectively solve the problem of high-strength steel leakage plating in the production line.
Based on the replication rate of strip surface roughness and waviness of different steel grades and specifications, the polishing roll polishing and chrome plating processes are continuously optimized, and the control curve of strip surface roughness and waviness is deeply explored to further improve the fineness of the strip surface, and the control technology of zinc powder low residue on the strip surface is developed to eliminate the color difference defect on the strip surface and help the comprehensive product revision rate continue to decrease. The automobile outer plate has achieved a breakthrough of zero, the outer plate yield has been significantly improved, a number of products have filled the gap in Shandong province, and the products have been applied to a number of domestic and foreign high-end automobile enterprises.