On January 2, the Ministry of Commerce issued a notice soliciting public opinions on adjusting China’s catalog of prohibited and export-restricted technologies (hereinafter referred to as the “Catalogue”). This “Catalogue” plans to add 1 technical element, modify 1 technical element and delete 3 technical elements.
After the revision, the catalog includes 23 technologies whose export is prohibited and 109 technologies whose export is restricted, for a total of 132 items. It should be noted that contents related to the field of 3D printing are still included in the scope of export restrictions.
In August 2020, the Ministry of Commerce adjusted the “Catalog” for the first time, adding “3D printing technology” (No.: 183506X) in the category of general equipment manufacturing, and clearly listed “the ‘integration of casting, forging and milling’ as a key metal 3D printing technology Enter the restricted export range.
Subsequently, in the draft for comments at the end of 2022, the content of “high temperature resistant fibrous resin materials for 3D printing and their simultaneous curing processes, etc.” ” was added and was officially published in the revised “Catalogue”. on December 21, 2023. Confirmed for inclusion in the restricted export list.
The integrated metal 3D printing technology of casting, forging and milling was developed by a professor of Huazhong University of Science and Technology and chief scientist of Tianyu Manufacturing.Zhang HaiouAn innovative result of more than ten years of research and development by Mr. Wang, who won the first prize of the 2020 Hubei Provincial Technological Invention Award. This technology will be inexpensivearc additiveTraining and continuityMicro molding and other materialsMolding technology is organically combined and integrated into the same workstation.Milling and cuttingforming process, thereby realizing the perfect integration of casting, forging and milling, forming an innovative manufacturing model of “casting, forging and milling in one”.
This technology in a creative wayMetal casting and forging processIntegrated into one, it is possible to 3D print metal forgings with equiaxial fine grain, high uniform density, high strength and toughness, and complex shapes. This revolutionary technology has solved the problem of my country’s aviation engine industry.Complex parts with special shapesPerformed under high temperatures, heavy loads and without cold cutting conditionsLow cost, high efficiency and high precision manufacturingThe problem is of significant strategic importance.
It is an advanced technology developed specifically for the preparation of high-performance composite materials. It combines a specially formulated high temperature resistant resin with reinforcing fibers to maintain excellent mechanical properties and dimensional stability in high temperature environments. At the same time, useSimultaneous curing processrealizing the simultaneous molding and solidification of fiber reinforcement and resin matrix during the printing process, thereby ensuring the high strength, high toughness and precision molding effect of the material. This technology is widely used in the aerospace, automotive and other fields, providing reliable solutions for the efficient manufacturing of high-demand parts.
At present, no relevant reports on the sources of high temperature resistant fibrous resin materials and their simultaneous curing processes have been found in public information. It is understood that there are currently a small number of people engaged inContinuous fiber 3D printingThe manufacturers mainly include Anaiso 3D, Synergy Hi-Tech and Same and Different 3D. However, these manufacturers’ technologies primarily use wire-form materials for printing, rather than using liquid resin as the base material.
This adjustment further clarifiesTwo key technologies in the field of 3D printingThe restricted export status fully highlights its important strategic importance in the field of high-end manufacturing. With the continued improvement of China’s catalog of banned and export-restricted technologies, China will continue to strengthen the protection of core technologies to ensure that key technologies are not disclosed. At the same time, it provides a stronger policy guarantee for technological innovation and industrial modernization.
The following is the full version of the latest adjustments to the “China Catalog of Banned and Export Restricted Technologies”.
1. Export prohibited coins
Architectural decoration, renovation and other construction industries
Delete entry for traditional Chinese construction technology (No. 085001J).
2. Export restrictions
(1) Architectural decoration, decoration and other construction industries
1. Delete the entry for Chinese Traditional Building Technology (No. 085001X).
2. Delete the entry on building environmental control technology (#085002X).
(2) Chemical raw materials and chemical products manufacturing industry
New battery cathode material preparation technology (No.: 252604X), control requirements
indicate:
“1. Technology for preparing lithium iron phosphate for batteries which simultaneously meets the following conditions
(1) The general chemical formula LixFeyMzPO4, where x, y, z≥0, M is the division
One or more elements other than Li and Fe
(2) The powder compaction density of this material at 300 MPa is ≥ 2.58 g/cc, 0.1 C.
Reversible capacity ≥160mAh/g, first Coulomb efficiency ≥97%
2. Technology for preparing lithium iron manganese phosphate for batteries which at the same time meets the following conditions
(1) The general chemical formula LixFeyMnzMaPO4, where x, y, z, a≥0,
M is one or more elements except Li, Fe, Mn
(2) The powder compaction density of this material at 300MPa is ≥2.38g/cc, 0.1C
First Coulomb efficiency ≥90%, reversible capacity 0.1C ≥155mAh/g, average 0.1C
Voltage ≥3.85V, 1C discharge capacity retention rate ≥97%, 2C discharge capacity retention rate
≥95%
3. Technology for preparing raw materials for phosphate cathodes
(1) Iron phosphate, iron manganese phosphate, ferrous oxalate for batteries, phosphorus for batteries.
Process for preparing lithium di(mono)hydrogen acid and lithium phosphate for batteries, in which iron phosphate is simultaneously
Meet the following conditions: tapped density > 2.1 g/cc, magnetic foreign bodies < 10 ppb."
(3) Non-ferrous metal smelting and rolling industry
1. Control the key points of metallurgical technology of non-ferrous metals (No.: 083201X) 2
Amended as follows: “Extraction of alumina mother liquor by ion exchange method, resin method and other methods
Technology and process for extracting metallic gallium”.
2. New controls in the metallurgical technology of non-ferrous metals (No.: 083201X)
Key points to realize:
“9. Lithium extraction technology from spodumene to produce lithium carbonate
(1) Technology for preparing lithium carbonate based on lithium-containing purification liquid
(2) Carbonization pyrolysis purification technology
(3) Mother liquor recycling technology
(4) Continuous production automatic control technology
(5) Lithium hydroxide carbonization technology
10. Lithium extraction technology from spodumene to produce lithium hydroxide
(1) Lithium hydroxide preparation technology based on lithium-containing purification liquid
(2) Freezing sodium precipitation technology
(3) Evaporation crystallization technology
(4) Continuous production automatic control technology
(5) Crushing and drying technology
11. Technology for preparing lithium metals (alloy) and lithium materials
(1) Multi-anode electrolysis technology
(2) Lithium metal distillation and purification technology
(3) Rolling processing technology of lithium metals (alloy) and lithium materials
12. Direct lithium extraction technology from raw brine
(1) Synthesis technology of adsorbent materials (aluminum series, titanium series, manganese series)
(2) PID process of brine adsorption and lithium extraction, adsorption and membrane integrated supporting equipment
and other technologies
13. Technology for preparing lithium-containing purification liquid
(1) Ion exchange impurity removal technology
(2) Technology for removing B, Ca, K, Na, S, etc. solutions containing lithium
(3) Membrane separation and electrodialysis impurity removal technology.
