Hongyuan supplies imported SKH-51 mold steel wholesale and what is the price of SKH-51 in stock?

Steel
Mold steel
Japan Hitachi
Pre-hard material
Clinker
Price
Heat treatment material
Hard material
Steel plate
Round bar
Overview
Also known as high-speed steel
Also known as wind steel or sharp steel, which means that it can harden and be very sharp even when cooled in the air during quenching. It is a complex alloy steel containing carbide-forming elements such as tungsten, molybdenum, chromium, vanadium, and cobalt. The total amount of alloying elements amounts to approx. It can still maintain high hardness above the high heat generated by high-speed cutting (about ℃). This is the main characteristic of high-speed steel: red hardness. Although carbon tool steel has a high hardness at room temperature after quenching and low-temperature tempering, the hardness drops sharply when the temperature is higher than ℃. At ℃, the hardness has dropped to a level similar to the annealed state, and the cutting metal is completely lost. This limits the ability of carbon tool steel to be used in making cutting tools. High-speed steel can be used to make cutting tools because of its good red hardness, which makes up for the fatal shortcomings of carbon tool steel.
The heat treatment process of high-speed steel is relatively complex and must go through a series of processes such as annealing, quenching, and tempering. The purpose of annealing is to eliminate stress, reduce hardness, and make the microstructure uniform to facilitate quenching. The annealing temperature is generally ℃. Quenching is generally performed in two stages due to its poor thermal conductivity. First preheat at ℃ (to avoid causing large thermal stress) and then quickly heat to the quenching temperature ℃ (the actual temperature of different brands is different when used) and then oil-cooled or air-cooled or inflatable body cooling. The factory uses salt furnace heating and the current vacuum furnace is also quite suitable. Extensive. After quenching, the internal structure still retains a part (approximately) of the retained austenite and has not transformed into martensite, which affects the performance of high-speed steel. In order to further improve the hardness and wear resistance by transforming the retained austenite, secondary tempering is generally required. Fire temperature ℃, holding hours each time. The manufacturing method usually uses electric furnace production. Recently, powder metallurgy method has been used to produce high-speed steel, so that the carbides are evenly distributed on the matrix in the form of extremely fine particles, which improves the service life.
Usage: Manufactures various cutting tools. Such as turning tools, drill bits, saw blades for hobs and demanding molds, etc. Origin: Japan
Physical properties
Brand Hitachi
Chemical composition
Chemical composition (only For reference)
Carbon
Silicon
Manganese
Chromium
Picture Tungsten
Vanadium
Molybdenum
Mechanical Properties
Comparison Standard
Factory state annealed to
Uses Cold stamping die, embossing die, cold forming roller cutting tools, reamer drill bits, tap punches, etc. Forging: ℃℃.
Annealing: Heated to ℃℃ at this temperature Stay in the furnace for an hour and let it gradually cool down.
Quenching: First preheat to ℃℃. Secondly heat to ℃ and then heat to ℃℃.℃℃. Quench in oil but the oil temperature must be kept at ℃. ℃ (generally complex tools require toughness.). Tempering is heated to ℃ and stays at this temperature and then cooled in still air. Tempering should be completed twice.
Hardness: above.