Although the share of high-speed steel tools is decreasing from the overall market, compared to solid carbide tools, tool toughness is still critical in some applications. Therefore, high-speed steel tools are still an economical and practical choice.
High-speed steel knives still have a place in the processing industry, mainly due to a huge advance in their manufacturing process: powder metallurgy high-speed steel was born. After the introduction of the special steel industry in 1970, this method quickly promoted the performance of high-speed steel. The hardness is close to the level of the cemented carbide while maintaining the original wear resistance. 
The main process of powder metallurgy high-speed steel is: pre-smelting high-speed steel to which alloying elements have been added, melting in an induction furnace, and then granulating with a gas spray. This process is a bit like spraying perfume from a bottle. However, unlike the spray perfume, the molten steel quickly solidifies into uniform particles after being sprayed. The granules are then loaded into a large, compressible drum for hot isostatic pressing to form a dense blank which is then forged or rolled.
The most important feature of this method is that a variety of alloying elements can be evenly distributed in the steel, thus solving an inherent problem of the original ingot-making steelmaking: segregation of alloying elements in steel. Segregation causes inconsistencies in the product and can affect the performance of the material. 
In addition, the powder metallurgy method can greatly increase the content of alloying elements in steel, which is impossible in the traditional ingot steelmaking process.
BudCarnes, technical services manager at Carpenten Powder Products, points out that the company produces a powdered high-speed steel called Micro-MeltMaxanet containing 13% tungsten, 10% cobalt, 6% vanadium, 4.75% chromium and 2.15% carbon. . Without the powder metallurgy method, it is impossible to achieve such a high alloy content. He said: "Maybe we cast steel ingots with such high alloy content steel. Maybe this steel ingot does not crack when it cools and solidifies. But the problem of uneven internal structure is unavoidable, and the ingot will form large carbides. Segregation."
Jelly Wright, vice president of technology at Crucible Materials, agrees that the traditional ingot process limits the amount of alloying elements. He said: "The difference between the powder high-speed steel process is that it quickly solidifies during spray granulation, forming a particularly fine carbide with a diameter of up to 3 μm and an average of 1 μm. The carbide formed in the ingot process has a diameter of 40 μm.
Typical alloying elements for high speed steel are: carbon, chromium, molybdenum, tungsten, vanadium and cobalt. The role of tungsten, molybdenum, and cobalt is to improve the "red hardness" of the material to withstand the heat generated by the friction between the tool and the workpiece. According to the American Society for Metals' "Material Handbook" vanadium, the carbides formed are the hardest, thus improving the high temperature wear resistance. 
Mark Mullen, vice president and general manager of GriggrSteel, pointed out that the company's powder high-speed steel development center is making a series of concrete progress in the process of adding a large amount of alloying elements to high-speed steel. He said: "With the continuous improvement of the production methods, steelmakers can now produce more and more alloy materials. With these different alloy compositions, different properties can be obtained for the purpose."
Carpenter's new high-alloy high-speed steel Micro-MeltMaxanet has a red hardness of 63.0HRC at a test temperature of 1000°F (538°C). The heat treatment parameters were: austenite transformation temperature of 2250 °F (1232 °C) and tempering temperature of 1025 °F (552 °C). In contrast, T-15 conventional high speed steel has a red hardness of 580 HRC under similar conditions.
High-speed steel knives still have a place in the processing industry, mainly due to a huge advance in their manufacturing process: powder metallurgy high-speed steel was born. After the introduction of the special steel industry in 1970, this method quickly promoted the performance of high-speed steel. The hardness is close to the level of the cemented carbide while maintaining the original wear resistance. 
The main process of powder metallurgy high-speed steel is: pre-smelting high-speed steel to which alloying elements have been added, melting in an induction furnace, and then granulating with a gas spray. This process is a bit like spraying perfume from a bottle. However, unlike the spray perfume, the molten steel quickly solidifies into uniform particles after being sprayed. The granules are then loaded into a large, compressible drum for hot isostatic pressing to form a dense blank which is then forged or rolled.
The most important feature of this method is that a variety of alloying elements can be evenly distributed in the steel, thus solving an inherent problem of the original ingot-making steelmaking: segregation of alloying elements in steel. Segregation causes inconsistencies in the product and can affect the performance of the material. 
In addition, the powder metallurgy method can greatly increase the content of alloying elements in steel, which is impossible in the traditional ingot steelmaking process.
BudCarnes, technical services manager at Carpenten Powder Products, points out that the company produces a powdered high-speed steel called Micro-MeltMaxanet containing 13% tungsten, 10% cobalt, 6% vanadium, 4.75% chromium and 2.15% carbon. . Without the powder metallurgy method, it is impossible to achieve such a high alloy content. He said: "Maybe we cast steel ingots with such high alloy content steel. Maybe this steel ingot does not crack when it cools and solidifies. But the problem of uneven internal structure is unavoidable, and the ingot will form large carbides. Segregation."
Jelly Wright, vice president of technology at Crucible Materials, agrees that the traditional ingot process limits the amount of alloying elements. He said: "The difference between the powder high-speed steel process is that it quickly solidifies during spray granulation, forming a particularly fine carbide with a diameter of up to 3 μm and an average of 1 μm. The carbide formed in the ingot process has a diameter of 40 μm.
Typical alloying elements for high speed steel are: carbon, chromium, molybdenum, tungsten, vanadium and cobalt. The role of tungsten, molybdenum, and cobalt is to improve the "red hardness" of the material to withstand the heat generated by the friction between the tool and the workpiece. According to the American Society for Metals' "Material Handbook" vanadium, the carbides formed are the hardest, thus improving the high temperature wear resistance. 
Mark Mullen, vice president and general manager of GriggrSteel, pointed out that the company's powder high-speed steel development center is making a series of concrete progress in the process of adding a large amount of alloying elements to high-speed steel. He said: "With the continuous improvement of the production methods, steelmakers can now produce more and more alloy materials. With these different alloy compositions, different properties can be obtained for the purpose."
Carpenter's new high-alloy high-speed steel Micro-MeltMaxanet has a red hardness of 63.0HRC at a test temperature of 1000°F (538°C). The heat treatment parameters were: austenite transformation temperature of 2250 °F (1232 °C) and tempering temperature of 1025 °F (552 °C). In contrast, T-15 conventional high speed steel has a red hardness of 580 HRC under similar conditions.
DC Motor Ball Style Ceiling Fan Light
DC Motor Ball Style Ceiling Fan Light,ceiling fan light,chandelier fan ceiling fan light,slient design ceiling fan with light
JIANGMEN ESCLIGHTING TECHNOLOGY LIMITED , https://www.jmesclightingfan.com