JSLD Super Alloy Technology Group is a leading manufacturer of high-purity high-temperature alloys and nickel-based copper alloy corrosion-resistant alloy pipes in China.
Main business and main products
The company focuses on the business of high-quality superalloys used in the aerospace and gas turbine fields. The products are divided into cast superalloy master alloys and deformed superalloys. Among them, the company’s cast high-temperature alloy master alloy products focus on the aero-engine and gas turbine industry chain, facing the domestic and foreign markets, and participate in the research and development and trial production of high-temperature alloys for domestic aero-engines and heavy-duty gas turbine hot-end components; +Electroslag remelting + vacuum consumable" triple smelting process production line, some of the brands are being verified by customers in the field of two machines.
Superalloys are mainly used to manufacture components for aero engines, ships and industrial gas turbines, including hot end parts (such as turbine blades, guide blades, turbine discs and combustion chambers, etc.) and non-hot end parts (such as fasteners, casings, etc.) Pipelines, etc.) are also used to manufacture energy conversion devices such as aerospace vehicles, rocket engines, nuclear reactors, petrochemical equipment, etc., and are the core basic materials of national strategies such as national defense building strategies and energy strategies. Therefore, the company's superalloy business is of great strategic significance to the country.
The company also produces nickel-based corrosion-resistant alloys. Because of the same matrix elements, the company and the high-temperature alloy business are collectively referred to as the high-temperature alloy and corrosion-resistant alloy business. At the same time, the company is deeply engaged in the business of high-performance alloy pipes. The products are mainly used in the fields of shipbuilding, nuclear power, petrochemical, electric power, rail transit and seawater desalination.
Core technologies
The company has established a superalloy technology research institute, established a provincial post-doctoral innovation practice base, and its research and development platform has been awarded the provincial superalloy engineering technology research center, the provincial superalloy engineering research center, the provincial superalloy innovation and cultivation center, and the provincial high temperature Alloy Joint Innovation Center. Through independent research and development, subject research and production practice, the company actively integrates and utilizes domestic and foreign technology and scientific research resources, strengthens cooperation and development with Shanghai Jiaotong University, Northwestern Polytechnical University, Shenzhen Wanze and other scientific research institutes and units, and gradually forms China's advanced technology system And production process. At present, the company has formed a number of independent and controllable core technologies in the fields of high-temperature alloys and corrosion-resistant alloys and alloy pipes, as follows:
1. High temperature alloy and corrosion resistant alloy
① Casting superalloy master alloy
A Ultra-high purity vacuum smelting technology
Through step-by-step deoxidation, denitrification, and desulfurization, ultra-low content control of O, N, and S in the cast superalloy master alloy is achieved. The total content of O, N, and S in the equiaxed and oriented master alloy is ≤15ppm, and the single crystal master alloy The total content of O, N and S is less than or equal to 10ppm [1]. By optimizing the feeding process, smelting process, and smelting and pouring refractory system, the ultra-low content of inclusions in the cast superalloy master alloy is controlled, and the scum content in all grades of master alloys can reach the level of purification of the company’s master alloys. The total content of O, N, S in the master alloy of shaft and orientation high temperature alloy is ≤15ppm, and the total content of O, N, S in the single crystal master alloy is ≤10ppm. Customer standards for some grades of master alloys are broader.
It can be controlled below level 2 (that is, the area percentage of scum is less than or equal to 2%). The above technology is mainly used in the smelting process of casting high-temperature master alloys.
B Homogenization and stability smelting technology
By electromagnetically stirring the cast high-temperature alloy master alloy melt, the composition of the master alloy melt in the smelting crucible is made uniform, and the homogenization control of the melt is realized. By optimizing the pouring system, including the 50mm diameter ingot splitter plate pouring system and the 80mm diameter and above ingot direct pouring system, the optimal matching of pouring temperature, pouring speed and module is achieved, and the goal of low segregation pouring and solidification of master alloy ingots is achieved . Through the application of the above technology, the single furnace consistency of the main element of the casting superalloy master alloy is controlled within ±0.1wt.%, and the furnace volatility is controlled within ±0.15wt.%. This technology is mainly used in the casting process and pouring process of superalloys.
C chemical composition ultra-low content detection technology
In 30 minutes, complete the rapid analysis of main elements, trace elements and trace elements in the sample before the furnace. Among them, the determination of trace elements can reach more than 40 kinds. By optimizing the sample preparation process and reducing oxidation, the stable measurement of oxygen and sulfur and other gas elements in superalloys is achieved, and the detection limit is below 3ppm; by modifying the technical parameters of the glow mass spectrometer, the rapid and accurate measurement of trace elements and trace elements, including trace elements The measurement uncertainty of impurity elements can reach 0.1ppm level. This technology is mainly used in the inspection process of cast superalloys and deformed superalloys.
②Deformed superalloy
A Vacuum induction melting technology
Break through the purification and homogenization smelting technology of deformed superalloys, master advanced superalloy preparation methods, and achieve low content control of O and S in deformed superalloys through stepwise deoxidation, denitrification, and desulfurization. Content ≤25ppm; by electromagnetically stirring the high-temperature alloy melt, the composition of the alloy melt in the melting crucible is uniform and uniform, and the homogenization control of the melt is realized; by optimizing the pouring system, the goal of low segregation pouring and solidification of deformed alloy ingots is achieved . This technology is mainly used in vacuum induction melting and pouring processes of deformed superalloys.
B Stabilized remelting technology
The compatibility of the slag series with different alloys was systematically studied, and the slag series suitable for different alloys were determined. A control system for the quality, preservation, baking and use of slag has been established. Through the combination of simulation and experiment, the electroslag remelting and heat sealing process is established, which can ensure the deep removal of harmful elements such as S and various non-metallic inclusions, and obtain dense electrodes. By optimizing the cooling and annealing process of the electroslag ingot, the internal stress is effectively reduced, which provides a guarantee for the smooth progress of consumable smelting.
Established special electrode welding equipment and technology, which can ensure the perpendicularity of the electrode and the uniformity of the gap between the electrode and the crystallizer. The system simulates the comprehensive influence of cooling (helium cooling, water cooling), droplet frequency, melting rate and other process parameters on the smelting process, and grasps the relationship between the flow of molten steel and the smelting movement of impurity particles, and reduces "black spots" and "white spots". "The probability of occurrence of typical macroscopic defects, the degree of dendrite segregation, and the establishment of a consumable smelting process. This technology is mainly used in electroslag remelting of deformed superalloys and vacuum consumable processes.
C Multi-stage homogenization processing technology
The melting point and dissolution law of harmful phases and the law of element diffusion have been systematically studied, and a homogenization treatment system suitable for different alloys and different ingot types has been established. It has broken through the low temperature difference uniform heating technology to ensure the uniform distribution of main and trace elements and the harmful phase (TCP The elimination of phase), and give full play to the strengthening effect of alloying and microalloying. This technology is mainly used in the forging process of deformed high-temperature alloys.
D High frequency and high speed fine crystal forging technology
Through high-frequency and high-speed forging preparation technology, repeated upsetting and temperature-controlled forging technology, and single-fire large deformation to obtain fine grain structure, the uniform control of 6-8 grade grain size of deformed superalloy bars with diameters of 100~400mm is realized , And effectively control the grain size and level difference of large-size bars, and improve the consistency of the organization. This technology is mainly used in the forging process of deformed high-temperature alloys.
③Nickel-based corrosion resistant alloy
A Pure nickel tube manufacturing technology for falling film of chemical equipment
High purity nickel-based alloy tubes are prepared by vacuum melting, electroslag remelting, forging, cross-rolling piercing, tube blank grinding, combined rolling, inner hole grinding and annealing, to achieve tensile strength ≥360MPa and yield strength ≥80MPa , Elongation ≥ 40%. This technology is mainly used in the production of nickel-based alloy tubes.
B The production process of nickel-based corrosion-resistant alloy pipes
Through the development of vacuum induction melting high purity technology for preparing nickel-based corrosion-resistant alloys, forging ratio forging temperature control technology, deformation precision rolling technology, heat treatment and organization control technology development, the total content of O, N, and S is ≤50ppm, which is improved The eccentricity of the product is accurately controlled from the national standard “±10% of the wall thickness” to “±10% of the wall thickness”
Within 3%". This technology is mainly used in the production of nickel-based alloy tubes.
2. Alloy pipe
① Manufacturing technology of high-strength and corrosion-resistant copper alloy seamless pipes for large ships
Through key technologies such as carbon control, deoxidation, sulfur reduction, special grain boundary control, and precise positioning of pipe stretching, the tensile strength of the pipe is ≥400MPa and the elongation ≥40%; the corrosion performance is ≤0.02mm in seawater environment. This technology is mainly used in the production of copper-nickel pipes.
②Manufacturing technology of copper alloy seamless coil for high-speed rail through ground wire
Through the optimization of horizontal continuous casting, planetary rolling, continuous drawing and heat treatment, the disadvantages of seam welded pipes that are easy to be corroded and cracked are avoided, and the tensile strength is ≥398MPa, the pipe length can reach 1000 meters, and the maximum coil weight is more than 1 ton. . This technology is mainly used in the production of high-speed rail ground wire alloy pipes.
③Optimization of tooth profile and process of high-efficiency heat transfer copper alloy pipe
By optimizing the parameters of the high-efficiency pipe tooth profile and rolling process, the oil content of the pipe surface does not exceed 25mg/㎡, the solid residue content does not exceed 38mg/㎡, and the total heat transfer coefficient reaches 9800W/㎡K. This technology is mainly used in the production of high-efficiency tubes.
R&D level
1. Source of core technology
The company's core technologies are all independently researched and developed, and the company has the ownership of the core technologies. The company's core technology has no disputes or potential disputes.
2. The advancement and specific characterization of core technology
(1) Casting superalloy master alloy of superalloy
Combined with specific products, the company's technical level is characterized as follows:
①The core index of the product meets the requirements of the national two-machine field of ultra-high-purity casting superalloy master alloy
The company has the technical level of mass production of ultra-high purity cast superalloy master alloy ingots. The core indicators of some grades meet the performance requirements of "ultra-high purity cast superalloy master alloy" in the advanced basic materials of key new materials by the Ministry of Industry and Information Technology of China.