Since the beginning of this year, Zhangxuan Science and Technology Special Materials Research and Development Company of Hegang Group has insisted that “the beginning is a decisive battle, and the beginning is a sprint”, firmly establishes business thinking, deepens market expansion and efficiency improvement, improves quality and creates efficiency, and tackles key problems in production line core competitiveness and efficiency creation The level has been improved in an all-round way. In January of this year, the company successfully completed the sales task of more than 260 tons of order products from 6 customers and 8 grades, and the price of mold materials increased by 33% year-on-year; multiple technical indicators of the nickel-based superalloy GH4080A reached the international leading level and achieved mass sales , achieved a good start in the first month.
Accurately meet customer needs
Promoting a 33% year-on-year increase in product prices
On January 28, the high-grade mold materials developed by Zhangxuan Technology’s special material production line for customers were successfully delivered to a high-end customer in Zhangjiagang, Hebei. The performance test of this product fully meets the requirements of the customer agreement, and the price per ton of steel reaches more than 24,000 yuan, which is 25.6% higher than the price of conventional die steel (H13). And this is just a microcosm of the company’s product price increase. Since the beginning of this year, the company has comprehensively connected with the market and customers, and has worked hard to implement the “double increase in volume and price”. The production and sales of products in the first month reached more than 260 tons, of which the price of H13 mold material products per ton of steel exceeded the 20,000 yuan mark , an increase of 33% year-on-year. The “double increase in volume and price” stems from the precise docking of customer needs. “The mold material developed this time, the customer has relatively high requirements on the composition content of a precious alloy, and requires narrow composition control of multiple elements, which is one of the products that are difficult to produce in the mold material series.” The person in charge of the mold material of the unit Wang Jianqiang introduced to the reporter of “China Metallurgical News”.
The unit’s technical team seamlessly meets the customer’s needs, designs an exclusive smelting plan according to the customer’s requirements, precisely designs the alloy composition, strictly controls the content of key elements, adopts a new furnace lining treatment method, and eliminates the influence of residual elements in the furnace on the composition of molten steel. At the same time, in the production process, the post workers strictly implement the roasting plan, accurately control the refining power, accurately mix various alloys, and skillfully use the white slag making process to ensure that the product composition 100% meets the customer’s requirements and the delivery state is uniform. Performance is a key indicator to measure the comprehensive quality level of the mold, and improving the ultra-fine process is one of the important means to improve the impact energy. The company’s product research and development team fully draws on the advanced practices of the industry, organizes technical personnel to go deep into the front line, conduct statistics and self-evaluation on the existing process data, conduct research on the carbide precipitation law, and formulate targeted and feasible improvement measures. Considering factors such as existing equipment and cooling speed, the product R&D team changed the original air-cooling method of ultra-fine process to air-cooling method, and arranged special personnel to adjust the wind reading, angle, time and other parameters reasonably according to material changes on site. At the same time, in conjunction with this process, the precautions of sand cooling and other processes are further refined, the cooling speed and cooling uniformity are effectively improved, and the product performance is enhanced. After inspection, the annealed structure of the mold steel has all reached AS3 grade or above, and the average grain size is above grade 8, which is higher than the standard requirements of the North American Die Casting Association for high-quality mold steel.
Deepen core technology research
Nickel-based superalloys realize mass sales
On January 31, 15 tons and 54 pieces of nickel-based superalloy GH4080A rolled off the special material production line. After inspection, all aspects of the product’s performance indicators fully meet customer requirements. The high-quality nickel-based alloy products produced and developed this time have been highly praised by customers, and the price is 15% higher than that of the same brand products on the market. Superalloys, as an irreplaceable key metallurgy material for hot end parts of military and civil gas turbine engines, have the reputation of “advanced engine cornerstone” and have excellent high temperature strength, good oxidation resistance and thermal corrosion resistance, and good corrosion resistance. Processing performance, welding performance, widely used in aerospace, nuclear energy, petroleum industry and other fields,
For a long time, the company has aimed at the technical problem of “stuck neck” in material selection and material selection in the field of high-end and cutting-edge nickel-based materials, continued to increase scientific and technological innovation, adopted forward-looking, basic and key technologies, accelerated the speed of scientific research into production and sales, and continuously enriched high-quality nickel base alloy material system. Up to now, the company has developed and produced more than 10 kinds of high-quality nickel-based alloys in the whole process.
“We aimed at the industry’s common problems of microstructure uniformity after high temperature treatment, uniformity control forging, and high durability, and more than 20 processes including vacuum induction smelting production process, electroslag treatment production process, forging and rolling production process Optimized and tackled key problems.” Ma Chao, the person in charge of the company’s nickel-based alloy steel grades
Briefly, due to the poor thermoplasticity of nickel-based alloy forgings, the narrow forging temperature window, and the composition and structure are very sensitive to process parameters, to achieve sufficient deformation at “low temperature”, it is necessary to solve multiple technical “bottlenecks” such as billet opening and controlled forging. The company’s technical team made a bold attempt to explore the relationship between material thermal processing plasticity, heat deformation ratio and microstructure evolution for a long time. It designed a forging process in a fine and small way, reasonably increased the amount of heat per fire, and adopted cross-electro-hydraulic Hammer forging and transition heat preservation pin manufacturing process, strictly control the temperature drop of each fire: improve the forging operation proficiency, ensure that all actions are in place in one step, achieve fast forging speed, stable hammer drop, and accurate reduction, successfully and proficiently mastered Extreme fire control forging technology.
It is worth mentioning that the nickel-based high-temperature alloy has passed the 750-degree Celsius long-term evaluation, and the physical sampling performance of the rod products for the internal combustion engine ventilation mechanism and the large rod products for high-temperature fasteners made of it is better than that of high-end suppliers in the market Product performance indicators.
Post time: Apr-21-2023