I.Ultra-High Purity Melting Technology

● Optimized Raw Material Selection: We establish a raw material impurity variation database for optimized material selection, effectively reducing impurity element content introduced via raw materials.

● Nickel, Cobalt, and Chromium Pretreatment:Combined with pretreatment processes, this further lowers oxygen(O), nitrogen(N) content, and slag inclusion area in master alloy ingots.

● Innovative "Source Purification - Process Regulation - End Point Minimization" Slag Control System: through this tripartite system we achieve enhanced slag control.Alloy slag inclusion area is consistently maintained at Class 1, with some premium products achieving Class 0.

Figure 1  Nickel Plate Before Treatment

Figure 2  Nickel Plate After Treatment

Building upon optimized raw material selection and pretreatment, the company has mastered ultra-clean superalloy melting technologies, including multi-stage refining, vacuum degassing, and compound desulfurization (Fig.3). This integrated approach achieves impurity levels of oxygen(O), nitrogen(N), and sulfur(S) below 5 ppm, significantly enhancing material high-temperature creep resistance and fatigue life. This effectively addresses the industry challenge of unstable performance in domestic superalloys under extreme operating conditions.

Figure 3  Ultra-Clean Superalloy Processing

II.Composition Uniformity/ Precise Control Technology

We employ a dual approach combining Computational Material Science (including material calculation, performance simulation, and process moldeling) with Vacuum Melting Technology. This synergy significantly enhances the uniformity and precision of alloy composition control.

A core innovation is the optimized integration of Electromagnetic Induction Stirring with a Real-time Sampling and Calculation System. This unique combination has enabled the development of a casting superalloy manufacturing technology characterized by:

● Precise composition control

● Exceptional microstructural homogeneity

Resulting Material Advantages:

the produced superalloys exhibit superior castablility.

this provides the essential material foundation for manufacturing complex superalloy castings, specifically enabling:

     º Uniform composition throughout the casting

     º Reduced porosity (shrinkage)

     º Complete mold filling in thin-wall sections (critical for intricate geometries)

The company has established a full-process control system for key elements, achieving Six Sigma-level stability control of critical high-temperature alloy compositions. Through precision regulation of key elements:

Batch-to-batch variation of strengthening elements Ta/Nb/W is  ±0.15%.

Variation of Al/Ti elements is  ±0.10%.

The process capability index(Cpk) for main elements consistently exceeds 1.67 between batches (See Fig.4), demonstrating exceptional process capablity in melting and superior compositional uniformity.

Figure 4. Element Variation and CpK Values