A series of new powder metallurgy technologies can also be used for the preparation of ceramic materials. Due to the advantages of powder metallurgy technology, it has become the key to solve the problems of new materials and plays a pivotal role in the development of new materials.
Second: What are the advantages of powder metallurgy process?
1: Using powder metallurgy technology can be directly made into porous, semi-dense or fully dense materials and products, such as oil-containing bearings, gears, cams, guide rods, tools, etc. It is a less cutting-free process.
2: It can produce materials and products with special structures and properties that cannot be produced by ordinary melting methods, such as new porous biological materials, porous separation membrane materials, high-performance structural ceramic abrasives and functional ceramic materials, etc.
3: Powder metallurgy has unique chemical composition and mechanical and physical properties that cannot be obtained with traditional melting and casting methods.
4: Powder metallurgy technology can minimize the alloy composition bias and eliminate coarse and uneven casting organization. It has an important role in the preparation of high-performance rare-earth permanent magnetic materials, rare-earth hydrogen storage materials, rare-earth light-emitting materials, rare-earth catalysts, high-temperature superconducting materials, and new metal materials (such as Al-Li alloys, heat-resistant Al alloys, superalloys, powdered corrosion-resistant stainless steel, powdered high-speed steel, and intermetallic compound high-temperature structural materials).
5: It can easily realize multiple types of composites and give full play to the respective characteristics of each component material, and is a process technology for producing high-performance metal-based and ceramic composites at low cost.
- must be mass-produced, generally speaking, the batch of 5000 pieces or more is more suitable for production by powder metallurgy process.
- The size is limited by the press capacity. Presses are generally a few tons to several hundred tons of pressure, the diameter is basically within 110MM can be made into powder metallurgy.
- Powder metallurgy gears are limited by the structure. Due to pressing and die on the reason, generally not suitable for the production of worm gears, herringbone gears and helical angle greater than 35 ° helical gears. Helical gears are generally recommended to be designed with helical teeth within 15°.
- The thickness of powder metallurgy gears is limited. The depth of the mold cavity and the press stroke must be 2 to 2.5 times the thickness of the gear, while taking into account the uniformity of the longitudinal density of the gear height, so the thickness of the powder metallurgical gear is also important.