I. Introduction

Iron-nickel fixed-expansion precision alloys, as a type of metal material with special thermal expansion properties, play a crucial role in modern industry. Their unique matching characteristics of thermal expansion coefficient make the material have broad application prospects in fields such as electronic packaging, aerospace, and precision instruments. Qinchuan New Materials (Zhengzhou) Co., Ltd., as a professional enterprise focusing on the research and development and manufacturing of high-purity metals, special alloys, and related products, has achieved remarkable results in the field of iron-nickel fixed-expansion precision alloys with its profound technical accumulation and rich application experience.

Part Two: Qinchuan New Materials' Technical Strength and Research and Development Layout

Qinchuan New Materials (Zhengzhou) Co., Ltd. is located in the Zhengzhou High-Tech Industrial Development Zone, with modern standard workshops and advanced production lines. The company specializes in the research and manufacturing of high-purity metals and special alloys, equipped with precision processing equipment and comprehensive analytical testing capabilities, ensuring high-quality product standards. In the field of iron-nickel permanent expansion precision alloys, Qingchuan New Materials has successfully developed a series of alloy products with excellent performance and wide applications through continuous technological innovation and process optimization.

R&D Team

Qinchuan New Materials boasts a research and development team composed of industry experts and technical backbone, who possess profound professional knowledge and rich practical experience in the fields of metal material science, heat treatment technology, and precision processing. The team members continuously track the international cutting-edge technological trends, combine market demands, and carry out targeted R&D work, providing strong support for the company's technological innovation.

2. Advanced production technology

Qinchuan New Materials employs advanced melting processes such as vacuum induction melting and electroslag remelting to ensure uniformity and purity of the alloy composition. Additionally, the company is equipped with precise rolling, forging, and heat treatment facilities, enabling customized production of various specifications and performance of Fe-Ni precision alloys according to different customer requirements. During the heat treatment process, the company strictly controls temperature and time parameters, optimizing the microstructure of the alloy to enhance its mechanical properties and thermal stability.

3. Comprehensive quality inspection system

Qingchuan New Materials has established a comprehensive quality inspection system, strictly controlling and inspecting quality at every stage from raw material entry to finished product shipment. The company is equipped with advanced equipment such as spectrometers, metallographic microscopes, and hardness testers, enabling comprehensive detection and analysis of the chemical composition, microstructure, and mechanical properties of alloys, ensuring compliance with relevant standards and customer requirements.

Section 3: Application Experience of Iron-Nickel Precision Alloy with Fixed Expansion

Qinchuan New Materials' iron-nickel fixed expansion precision alloys have been widely used in fields such as electronic packaging and aerospace due to their excellent performance and stable quality. The following are some specific application cases:

Field of electronic packaging

In the field of electronic packaging, Fe-Ni shape-memory alloys are mainly used for matching seals with materials such as glass or ceramics, for manufacturing components like leads, frames, and sealed connectors for tubes, transistors, and integrated circuits. The 4J42 Fe-Ni shape-memory alloy products from Qinchuan New Materials, by adjusting the nickel content, have achieved the characteristic of matching with soft glass and ceramics with different expansion coefficients within a given temperature range. This alloy has a linear expansion coefficient similar to that of 95% Al2O3 ceramics within the temperature range of -60℃ to +600℃, effectively avoiding seal failure issues caused by thermal expansion and contraction, enhancing the reliability and service life of electronic equipment.

2. Aerospace industry

In the aerospace field, iron-nickel fixed expansion precision alloys are mainly used for manufacturing high-temperature low-expansion components, such as key parts of rocket engines and frames of high-precision telescopes. These components need to maintain shape and size stability under extreme temperature conditions to ensure the normal operation of the equipment. Qinchuan New Materials' UNS K94100 iron-nickel fixed expansion glass-sealed alloy products exhibit near-zero expansion properties between 20℃ and 230℃, while having a high elastic modulus (about 145 GPa). This makes the material less prone to deformation under external pressure or tension and has strong recovery capability. These excellent properties make UNS K94100 alloy an ideal choice for the aerospace industry.

Case Study: Application of UNS K94100 Alloy in Aerospace Components

A well-known aerospace company encountered a problem with a critical component prone to deformation under high-temperature conditions while developing a new rocket engine. The component needs to maintain its shape during high-temperature combustion to ensure the engine's normal operation. After extensive research and comparison, the company ultimately selected Qinchuan New Materials' UNS K94100 Fe-Ni superelastic glass seal alloy as the material for the component.

During the R&D process, the technical team of Qinchuan New Materials closely collaborated with the enterprise, carrying out customized production and heat treatment process optimization for the UNS K94100 alloy based on the specific requirements of the components. By precisely controlling the melting temperature, cooling rate during casting, and subsequent heat treatment process, the microstructure of the alloy was successfully improved, enhancing its tensile modulus and expansion properties.

After rigorous testing and verification, components manufactured using UNS K94100 alloy exhibit less than 0.01% deformation rate under high temperatures of 300℃, significantly lower than the design requirements. Additionally, the component has demonstrated excellent stability and reliability in multiple thermal cycle tests, effectively resolving the existing issues. This successful case not only verifies the superior performance of UNS K94100 alloy in the aerospace field but also further enhances Qinchuan New Materials' reputation and influence in the industry.

V. Conclusion and Outlook

Qingchuan New Materials (Zhengzhou) Co., Ltd. has achieved remarkable results in the field of iron-nickel fixed expansion precision alloys, thanks to its profound technical accumulation, advanced production processes, and comprehensive quality inspection system. The company's products, with their excellent performance and stable quality, are widely used in electronic packaging, aerospace, and other fields, and have earned unanimous praise from customers.

In the future, with the continuous advancement of technology and the ever-changing market demands, Qinchuan New Materials will continue to adhere to the corporate spirit of innovation, pragmatism, and efficiency, increase R&D investment, optimize production processes, and enhance product quality and service levels. Simultaneously, the company will actively expand into new application fields and market spaces, providing high-quality Fe-Ni shape-memory precision alloys and solutions to more customers, driving the development and application progress of materials science.