Although the inherent properties of the material can affect the difficulty of the extrusion process, the thickness of the extrusion jacket and the extrusion method will affect the quality of the extrusion product, but the extrusion temperature is the most important factor in controlling the hot extrusion parameters. Too high hot extrusion temperature may damage the microstructure of titanium plate products and shorten the life of extrusion tools; too low hot extrusion temperature will cause difficulty in extrusion.
Compared to the low strain rate of hot isostatic pressing of titanium plates, powder forging has a high strain rate at high temperatures. Using hot forging can not only make the product have a dense final shape and size, but also obtain a uniform grain structure, which significantly improves the strength and toughness of the product. At the same time, it can maintain the advantages of less powder metallurgy and chipless technology, and has the characteristics of accurate forming, high material utilization, low forging energy, long mold life and low cost.
In plastic flow, the behavior of porous compacts is the main focus of powder forging.
Powder forging is a combination of densification and flow during uniaxial pressing. In powder forging, reducing friction is important to improve the density and uniformity of the properties of the forged product. Without lubrication, forged powder products exhibit a low density in the radial region. Friction during forging will cause tensile stress in the periphery, resulting in micro-cracks.
In powder compacts, high porosity means that the material is fragile and has a low Poisson's ratio.
At high temperatures, due to the lower strength and work hardening of titanium materials, metals show good fluidity under stress. The stress required for powder compacts to deform to full density at room temperature is much higher than the actual stress. To achieve full density, heat compaction can be used. High-porosity powder compacts are much more fragile than cast-plated products. If the compacted powder is compacted by thermoforming, its properties can be similar to those of cast silver products. Although hot forging to full density is difficult, the elimination of final voids is very beneficial to the performance of the product. The main height strain (usually more than 50%) is conducive to the elimination of pores and good bonding between particles. Of course, too large principal height strains may cause microcracks. Ultimately, the size of the titanium plate compact must be sufficient to fill the shape of the part at full density. The hot forging temperature depends on the stress required to achieve sufficient deformation. The size and density of the green compact depends on the lateral constraints of the mold and the shape of the part. A too large original height to diameter ratio may cause wrinkles, so there is a limit on the ratio of height to diameter.
6al4v titanium round bar grade 2 titanium tube grade 9 titanium plate titanium flange
Compared to the low strain rate of hot isostatic pressing of titanium plates, powder forging has a high strain rate at high temperatures. Using hot forging can not only make the product have a dense final shape and size, but also obtain a uniform grain structure, which significantly improves the strength and toughness of the product. At the same time, it can maintain the advantages of less powder metallurgy and chipless technology, and has the characteristics of accurate forming, high material utilization, low forging energy, long mold life and low cost.
In plastic flow, the behavior of porous compacts is the main focus of powder forging.
Powder forging is a combination of densification and flow during uniaxial pressing. In powder forging, reducing friction is important to improve the density and uniformity of the properties of the forged product. Without lubrication, forged powder products exhibit a low density in the radial region. Friction during forging will cause tensile stress in the periphery, resulting in micro-cracks.
In powder compacts, high porosity means that the material is fragile and has a low Poisson's ratio.
At high temperatures, due to the lower strength and work hardening of titanium materials, metals show good fluidity under stress. The stress required for powder compacts to deform to full density at room temperature is much higher than the actual stress. To achieve full density, heat compaction can be used. High-porosity powder compacts are much more fragile than cast-plated products. If the compacted powder is compacted by thermoforming, its properties can be similar to those of cast silver products. Although hot forging to full density is difficult, the elimination of final voids is very beneficial to the performance of the product. The main height strain (usually more than 50%) is conducive to the elimination of pores and good bonding between particles. Of course, too large principal height strains may cause microcracks. Ultimately, the size of the titanium plate compact must be sufficient to fill the shape of the part at full density. The hot forging temperature depends on the stress required to achieve sufficient deformation. The size and density of the green compact depends on the lateral constraints of the mold and the shape of the part. A too large original height to diameter ratio may cause wrinkles, so there is a limit on the ratio of height to diameter.
6al4v titanium round bar grade 2 titanium tube grade 9 titanium plate titanium flange
没有评论:
发表评论