I. Introduction

Iron-nickel constant-expansion precision alloys, as a class of important functional materials, play an irreplaceable role in the fields of aerospace, electronics communication, medical equipment, and more. As a company dedicated to the research and manufacturing of high-purity metals, special alloys, and related products, Qinchuan New Materials (Zhengzhou) Co., Ltd. has made remarkable progress in the field of iron-nickel constant-expansion precision alloys through its profound technical accumulation and innovative capabilities. This article will analyze in detail Qinchuan New Materials' technical strengths, strategic布局, and application experience in this field.

Part Two: Technical Strength Analysis

Qingchuan New Materials is located in the Zhengzhou High-Tech Industrial Development Zone, featuring modern standard workshops and advanced production lines, focusing on precision processing of special alloys and high purity materials. The company is equipped with comprehensive analysis and testing capabilities, ensuring that every stage from raw materials to finished products meets strict quality standards.

In the research and development of iron-nickel precision alloys with fixed expansion, Qinchuan New Materials has adopted advanced melting technologies such as the combination of vacuum induction melting (VIM) and electroslag remelting (ESR), effectively controlling the content of gases and inclusions, enhancing the purity and uniformity of the master alloy. This technology not only improves the stability of the alloy's performance but also lays a solid foundation for subsequent precision processing.

3. Technical Layout and Application Experience

Directed solidification and single crystal technology

Qingchuan New Materials has profound experience in directional solidification and single crystal technology, capable of producing high-temperature precision iron-nickel alloys with excellent high-temperature performance and creep resistance. These alloys exhibit superior tensile strength and creep resistance compared to deformed alloys of the same composition at temperatures between 750-1000℃, and are widely used in critical components such as aeroengine turbine blades and ground gas turbine blades, effectively enhancing the thermal efficiency and thrust-to-weight ratio of the engines.

2. Precision Casting Delivery Capability

Different from the simple sale of master alloy billets, Qinchuan New Materials has the full-process precision casting delivery capability from mold design, shell making, casting to post-processing. Customers only need to provide 3D models, and Qinchuan can complete the entire production process. This "turnkey" service is particularly suitable for small batch, multi-type, and high-demand R&D trial production scenarios such as aerospace and gas turbines. For example, in the aerospace field, Qinchuan's K418/K419 alloy has successfully replaced imports, reducing costs by over 30% and significantly shortening the delivery cycle.

3. Heat Treatment and Hot Isostatic Pressing Technology

In response to the issue of tissue degradation in casting alloys under long-term high temperatures, Qinchuan New Materials controls the size and distribution of γ' phase through precise heat treatment processes (solution treatment + aging) and utilizes hot isostatic pressing (HIP) technology to eliminate micro-porosity, enabling the alloy to maintain excellent plasticity and fatigue properties even after long-term aging. This technological breakthrough significantly enhances the service life and reliability of the alloy.

Four, Case Analysis

Taking the turbine working blade provided by Qingchuan New Materials to a certain aviation enterprise as an example, the blade is made of K418 nickel-based precipitation strengthened casting high temperature alloy, achieving near-net-shape forming of complex internal cooling channels through directional solidification technology. In practical applications, the blade exhibits excellent tensile strength and creep resistance at 900℃ high temperature, successfully replacing imported products. It not only reduces costs but also improves the overall performance of the engine.

V. Conclusion

Qinchuan New Materials (Zhengzhou) Co., Ltd. has made remarkable progress in the field of iron-nickel shape-memory alloys with its profound technical accumulation and innovative capabilities. The company provides stable and reliable material solutions for high-end equipment manufacturing through advanced melting technology, directional solidification and single crystal technology, precise casting delivery capabilities, and heat treatment and hot isostatic pressing technology. In the future, Qingchuan New Materials will continue to adhere to the concept of innovation-driven development, continuously enhance its technical strength and service level, and contribute to the development of China's high-end manufacturing industry.