I talked about China's dominance in mold manufacturing here and other steps in the manufacturing supply chain. How it has come to complete dominate the parts production involving what seems to be relatively simple products.
News on China's scientific and technological development.
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I talked about China's dominance in mold manufacturing here and other steps in the manufacturing supply chain. How it has come to complete dominate the parts production involving what seems to be relatively simple products.
supercat
Colonel
Award-winning data scientist went back to China after almost 20 years in the US.
Bytedance's revenue will catch up Meta/Facebook this year.
Bytedance's revenue will catch up Meta/Facebook this year.
Laser Cooling Alkaline-earth Atoms for Optical Clock in Chinese Space Station
Abstract This study presents an achievement of laser cooling of alkaline-earth atoms in the Chinese Space Station’s strontium (Sr) atomic space optical clock. The system’s core components, physical unit, optical unit, and electrical unit, have a total volume of 306 L and a total mass of 163.8 kg. These compact and robust units can overcome mechanical vibrations and temperature fluctuations during space launch. The laser sources of the optical unit are composed of diode lasers, and the injection locking of slave lasers is automatically performed by a program. In the experiment, a blue magneto-optical trap of cold atoms was achieved, with the atom numbers estimated to be approximately (1.50 ± 0.13) × 106 for 87Sr and (8.00 ± 0.56) × 106 for 88Sr. This work establishes a foundation for atomic confinement and high-precision interrogation in space-based optical clocks and expands the frontiers of cold atom physics in microgravity.
supercat
Colonel
Chinese scientists have announced the birth of the world's first somatic cell-cloned dzo in SW China's Xizang, marking a critical breakthrough in high-altitude breeding technology.
Delivered via caesarean section and weighing 26 kg, the newborn male calf has survived for over two months and is in good health.
Delivered via caesarean section and weighing 26 kg, the newborn male calf has survived for over two months and is in good health.
With a density of 99.5%, Xikong Intelligent Manufacturing has overcome the EBM molybdenum alloy 3D printing problem
Recently, Xi'an Xikong Intelligent Manufacturing Technology Co., Ltd. has made a major breakthrough in the field of refractory metal additive manufacturing. Its independently developed electron beam additive manufacturing ( EBM) equipment has successfully achieved high-performance precision forming of pure molybdenum materials, overcoming the global problem that has long restricted the engineering application of molybdenum alloys. This technology provides a new solution for the aerospace, nuclear energy and high-temperature industries.
Breaking through the bottleneck of the industry: achieving high-density, high-performance molybdenum components
Molybdenum alloy is an ideal material for extreme environment applications due to its ultra-high melting point (>2600℃), excellent radiation resistance and high temperature stability. However, traditional manufacturing has long faced challenges such as significant low-temperature brittleness, difficult forming, and high welding defect rate, resulting in extremely low yield. Xikong Intelligent Manufacturing has achieved three major breakthroughs through innovative processes:
High-density defect-free forming : Using electron beam gradient energy input and dynamic preheating technology to accurately control residual stress and avoid grain boundary cracking, molybdenum alloy parts with a density of more than 99.5% are produced, and the mechanical properties are comparable to traditional forging levels.
Integrated manufacturing of complex structures : For the first time, support-free integrated printing of complex structures such as porous cooling channels and honeycomb sandwiches is achieved, reducing component weight by 40% while significantly improving heat dissipation efficiency.
Stable and reliable performance : The first batch of samples passed rigorous testing and fully meet the requirements of use in harsh environments such as extreme high temperature and strong corrosion.
High-density defect-free forming : Using electron beam gradient energy input and dynamic preheating technology to accurately control residual stress and avoid grain boundary cracking, molybdenum alloy parts with a density of more than 99.5% are produced, and the mechanical properties are comparable to traditional forging levels.
Integrated manufacturing of complex structures : For the first time, support-free integrated printing of complex structures such as porous cooling channels and honeycomb sandwiches is achieved, reducing component weight by 40% while significantly improving heat dissipation efficiency.
Stable and reliable performance : The first batch of samples passed rigorous testing and fully meet the requirements of use in harsh environments such as extreme high temperature and strong corrosion.
China's metal 3D printing, overtaking on the curve
In the domestic metal 3D printing industry, a number of powerful metal powder material manufacturers have emerged:
Farsoon High-Tech will open a new material manufacturing R&D and manufacturing headquarters covering more than 140,000 square meters at the end of 2024, achieving a leap forward in production capacity.
The "EP-M1550 Ultra-large Size Metal Additive Manufacturing System" launched by Yijia 3D in 2023 was recognized as the "first unit in China". The EP-M2050 launched in 2024 was the first in the industry to break the 2-meter limit on three-axis printing size. It is equipped with 36 lasers and 6 matrix modes, compatible with 49 laser and 64 laser capabilities, and has higher molding efficiency.
AVIC Mate, a national-level specialized and innovative "little giant" enterprise, has independently developed the large-scale ultra-high speed "plasma rotating electrode atomization powder making equipment AVI-PREP-4W"; the plasma torch atomization powder making equipment AVI-PA30 was successfully launched on the market, leading the industry in completing industrial upgrades.
Willari, a national-level specialized and innovative "little giant" enterprise, focuses on metal powders for additive manufacturing, such as high-temperature alloys, titanium alloys, mold steels and aluminum alloys. The market share of its main products ranks among the top in the industry, and the self-sufficiency rate of high-end intelligent equipment and key components is 100%, reaching the world's leading level.
Ouzhong Technology, a national-level specialized and innovative "little giant" enterprise, has established the first domestic ultra-high speed (30,000rpm) plasma rotating electrode atomization (SS-PREP®) metal spherical powder industrial production line with international advanced level and the first domestic high-temperature alloy powder disk "ultra-high speed PREP powder + hot isostatic pressing HIP" (SS-PREP Disk®) short process production line.
Xi'an Sailon, a national-level specialized and innovative "little giant" enterprise, is the first professional enterprise in China to carry out commercial plasma rotating electrode atomization (PREP) powder making technology, equipment research and development, and industrial application. This year, it successfully launched the first commercial microwave plasma powder making machine in China.
Youyan Powder Materials, which is listed on the Shanghai Stock Exchange Science and Technology Innovation Board, has reached the international advanced level in its 3D printing metal powder material preparation technology as a whole, and some of its technical indicators have reached the international leading level.
FalconTech, China's leading provider of a full range of metal additive manufacturing technology solutions, has provided titanium alloy powders and parts for 3D printing that meet international aviation standards in batches, and is a qualified supplier of metal additive manufacturing parts for COMAC.