Recently, the “high performance (high impact, high pressure resistance) low temperature impact thick and large section ductile iron material technology” project undertaken by Shared Equipment Co., Ltd. has completed all the key tasks and passed the acceptance.
The low-temperature high-toughness ferritic matrix ductile iron material and the casting process technology of related products are still in the blank field in our district. Improve the technical content and added value of ductile iron materials, improve the casting process of related products, and manufacture ductile castings that meet the needs of wind power applications. After the sharing equipment Co., Ltd. announced this technical task, in view of the problem that low-temperature high-strength and toughness materials are prone to casting defects such as shrinkage porosity, shrinkage cavities, and slag inclusions in thick and large-section castings, a low-temperature high-toughness ferrite matrix ductile iron was developed. Material research, the effects of chemical components such as carbon, silicon, manganese, smelting process parameters, alloy types and additions on the microstructure and properties were analyzed and studied; The influence of grain refinement; successfully overcome the as-cast high-performance, low-temperature impact thick and large-section ductile iron material and forming technology, and innovatively developed two types of QT400-18AL (-30 ℃) / QT350-22AL (-40 ℃) Low temperature ferrite matrix ductile iron material, and formed a stable process scheme.
Through the implementation of the project and the application and transformation of the results, Shared Equipment Co., Ltd. has formed a product production line dedicated to wind power generation. Rack), the main technical and performance indicators meet the user technical agreement requirements.
During the implementation of the project, 5 invention patents were applied for, 1 utility model patent was authorized, and 1 autonomous region scientific and technological achievement was obtained. A total of 271 pieces of 5 kinds of products were produced, and the sales revenue was nearly 70 million yuan.
The breakthrough in high performance (high impact, high pressure resistance) low temperature impact thick and large section ductile iron material technology and product casting technology has laid the foundation for the overall lightweight design of wind power equipment, energy saving and consumption reduction, and the layout of onshore wind farms for casting production. It will further optimize the new energy equipment industry in our district and boost the high-quality development of the industry.