Usage: 1, widely used in buildings and engineering structures. Used for manufacturing steel bars or building factories, high-voltage transmission towers, bridges, vehicles, boilers, containers, ships, etc. It is also widely used as mechanical parts with low performance requirements.
2. It can be used for various unimportant mold parts such as mold handles.
3. The punch is made of Q235 steel, which can be used directly without tempering after quenching, and the hardness is 36~40HRC, which solves the fracture phenomenon of the punch in use.
45# steel is a high-quality carbon structural steel, corresponding to Japanese standard S45C, American standard: 1045 and German standard C45. It is characterized by higher strength and deformation resistance than ordinary A3 steel.
Usage: The hardness of 45 steel plate after quenching and before tempering is greater than HRC55. After heat treatment and tempering, it can reach HRC42-46, which can not only ensure its good mechanical properties, but also meet the requirements of surface hardness. It can be used to manufacture small cross-section and large load quenched and tempered parts and large stress normalized parts, such as pins, guide posts, pointers and other parts.
T 12A carbon tool steel is a kind of * * * precipitated steel. Because of its high carbon content and a large number of excess carbides after quenching, it has good machinability, low price and easy source.
Usage: But its disadvantages are low hardenability, poor wear resistance and large quenching deformation. Therefore, it is only suitable for manufacturing some tools with small size, simple shape and light load, as well as cold image molds that require a shallow hardened layer and maintain high toughness.
40Cr is the standard steel grade of GB in China, and 40Cr steel is one of the most widely used steels in mechanical manufacturing. After quenching and tempering, it has good comprehensive mechanical properties, good low temperature impact toughness and low notch sensitivity.
Usage: 1 After tempering, this kind of steel is used to manufacture mechanical parts that bear medium load and work at medium speed, such as steering knuckle, rear half axle of automobile and gears, shafts, worms, splined shafts and tip sleeves on machine tools.
2. After medium temperature quenching and tempering, it is used to manufacture parts that work under high load, impact and medium speed, such as gears, spindles, oil pump rotors, sliders, bushings, etc.
3. After quenching and tempering at low temperature, it is used to manufacture parts with heavy load, low impact, low wear resistance and solid section thickness less than 25mm, such as worms, spindles, shafts and collars.
4. After tempering and high-frequency surface quenching, it is used to manufacture parts with high surface hardness and good wear resistance without big impact, such as gears, bushings, shafts, spindles, crankshafts, mandrels, pins, connecting rods, screws, nuts and intake valves.
GCr 15 is a kind of high carbon chromium bearing steel with less alloy content. After quenching and tempering at low temperature, it has high hardness, uniform structure, good wear resistance and high contact fatigue performance.
Uses: It is used to manufacture various bearing rings and rolling bodies, such as steel balls, rollers and rings for internal combustion engines, electric locomotives, automobiles, tractors, machine tools, rolling mills, drilling machines, mining machinery, general machinery and high-speed rotating and high-load mechanical transmission bearings. Besides being used as balls and bearing rings, etc.
W 18Cr4V is a tungsten high-speed steel with high hardness, red hardness and high temperature hardness. Its heat treatment range is wide, quenching is not easy to overheat, heat treatment process is not easy to oxidize and decarbonize, and grinding performance is good.
Uses: The disadvantages are serious carbide segregation and low thermoplasticity, so it can only be used as a small tool with complex shape.
ZG 270-500 is a medium carbon cast steel with certain toughness and plasticity, high strength and hardness, good machinability and acceptable weldability, and its casting performance is worse than that of low carbon steel.
Usage: widely used in manufacturing flywheel, coupler, hydraulic cylinder, frame, steam hammer cylinder, bearing seat, connecting rod, box and crank.
Most or all of the carbon in HT 150 cast iron exists as free flake graphite, and its fracture is gray, so it is called gray cast iron. It has certain mechanical properties and good processability.
Uses: Good casting performance and simple process; Low casting stress, no need for artificial aging treatment; It has certain mechanical strength and excellent vibration reduction performance; Used for parts with moderate strength requirements.
H62 brass refers to ordinary brass with an average copper content of 62%. Copper alloy with other elements added on the basis of ordinary brass is called special brass, which is still represented by "H", followed by chemical symbols and the average composition of other added elements.
Usage: It can be used for all kinds of stressed parts made by deep drawing and bending, such as pins, rivets, washers, nuts, conduits, barometer springs, filter screens, radiator parts and so on.
Baidu Encyclopedia -Q235 Metal Introduction?
Baidu Encyclopedia -45 Metal Introduction
? Baidu Encyclopedia -T 12A Metal Introduction?
? Introduction to Baidu Encyclopedia -40Cr Metal
Baidu Encyclopedia -GCr 15 Introduction to Metals
Introduction to Baidu Encyclopedia -W 18Cr4V Metal
Baidu Encyclopedia -ZG 270-500 Brief Introduction to Metals