Common models steel properties and applications
1, 45 - high-quality carbon structural steel, is the most commonly used carbon tempered steel
Main features: The most commonly used carbon tempered steel, good comprehensive mechanical properties, low hardenability, easy to crack when water quenching. Tempering treatment should be used for small parts and normalizing treatment should be used for large parts. Application examples: Mainly used in the manufacture of high strength moving parts, such as turbine impeller, compressor piston. Shaft, gear, rack, worm, etc. Welding parts should be preheated before welding and stress-relieving annealing after welding.
2, Q235A - the most commonly used carbon structural steel
Main features: high plasticity, toughness and welding performance, cold stamping performance, as well as a certain strength, good cold bending performance. Application examples: Widely used in general requirements of parts and welding structures. Such as tension rod, connecting rod, pin, shaft, screw, nut, ring, bracket, frame, building structure, bridge and so on.
3, 40Cr - one of the most widely used steel, alloy structural steel
Main features: After quenching and tempering treatment, it has good comprehensive mechanical properties, low temperature impact toughness and low notch sensitivity, good hardenability, higher fatigue strength can be obtained when oil is cold, complex shape parts are easy to crack when water is cooled, cold bending plasticity is medium, good cutting workability after tempering or tempering, but the weldability is not good, easy to crack, before welding should be preheated to 100~150℃, generally When used in the tempered state, it can also be carbonitriding and high-frequency surface quenching treatment. Application example: After tempering treatment, it is used in manufacturing Speed and medium-load parts, such as machine tools gear, shaft, worm, spline shaft, thimble sleeve, etc., tempered and high-frequency surface quenching for the manufacture of surface hardness, wear-resistant parts, such as gear, shaft, spindle, crankshaft, spindle, sleeve, dowel, connecting rod, screw nut, air intake valve, etc., after quenching and moderate temperature tempering for the manufacture of heavy, medium-speed impact parts, such as oil pump rotor, slide Gear, spindle, sleeve ring, etc., after quenching and low temperature tempering for the manufacture of heavy, low impact, wear-resistant parts, such as worm, spindle, shaft, sleeve ring, etc., carbonitriding place is after the manufacture of larger size, low temperature impact toughness of higher transmission parts, such as shaft, gear, etc.
4, HT150 - gray cast iron
Application examples: gear box, machine bed, box, hydraulic cylinder, pump body, valve body, flywheel, cylinder head, belt wheel, bearing cover, etc.
5, 35 - a variety of standard parts, fasteners commonly used materials
Main features: appropriate strength, good plasticity, high cold plasticity, weldability. It can be partially upset and drawn under cold conditions. Low hardenability, normalizing or tempering after use examples: suitable for the manufacture of small section parts, can withstand large loads of parts: such as crankshaft, lever, connecting rod, carabiner, etc., a variety of standard parts, fasteners.
6, 65Mn - commonly used spring steel
Application examples: small size of various flat, round springs, cushion springs, spring spring, can also be made spring ring, valve spring, clutch spring, brake spring, cold coil spring, spring and so on.
7, 0Cr18Ni9 - the most commonly used stainless steel
Characteristics and application: As a stainless heat-resistant steel is most widely used, such as food equipment, general chemical equipment, originally used in industrial equipment.
8, Cr12 - commonly used cold work die steel manufacturers steel number.
After tempering at high temperature, it has high hardness, high toughness and good wire-cutting performance. Used for precision cold stamping die, drawing die, rolling die, cold blanking die, punch, etc. 10, SM45 - ordinary carbon plastic die steel
10, DCCr12MoV - wear-resistant chromium steel
Compared with Cr12 steel, the carbon content is lower, and the addition of Mo and V, the uneven carbide has been improved,MO can reduce the segregation of carbide and improve the hardenability,V can refine the grain to increase toughness. The steel has high hardenability, the cross section can be completely quenched below 400mm, can still maintain good hardness and wear resistance at 300~400℃, has high toughness compared with Cr12, the volume change during quenching is small, and has high wear resistance and good comprehensive mechanical properties. Therefore, it can manufacture a large cross-section, complex shape, and withstand a large impact of various molds, such as ordinary drawing die, punching die, punching die, blanking die, cutting die, piping die, drawing die, cold extrusion die, cold cutting scissors, circular saw, standard tools, measuring tools, etc.
11, SKD11 - ductile chromium steel
Japan Hitachi plant production. The casting structure in the steel is improved and the grain is refined. Compared with Cr12mov, the toughness and wear resistance are improved. The service life of the mold is extended.
12, D2 -- high carbon and high chromium cold work steel
Made in the United States. With high hardenability, hardenability, wear resistance, high temperature oxidation resistance, good rust resistance after quenching and polishing, small heat treatment deformation, it is appropriate to manufacture a variety of requirements of high precision, long life of cold work molds, tools and measuring tools, such as drawing die, cold extrusion die, cold shear knife, etc.
13, SKD11 - non-deformation toughness high chromium steel
Japan Hitachi plant production. Due to the increase of MO and V content in the steel, the casting structure in the steel is improved, the grain is refined, and the carbide morphology is improved, so the strength and toughness of the steel is higher than SKD1 and D2, the wear resistance is also increased, and it has higher tempering resistance. The practice proves that the life of this steel die is higher than that of Cr12mov. Often make high requirements of the mold, such as tensile die, impact wheel die, etc.
14, DC53 - high toughness high chromium steel
Japan large plant type production. The hardness of heat treatment is higher than SKD11. After high temperature tempering, it can reach 62-63HRC high hardness, and DC53 exceeds SKD11 in strength and wear resistance. Twice as strong as SKD11. The toughness of DC53 rarely cracks and cracks in cold work mold manufacturing. The service life is greatly improved. The residual stress is small. The residual stress is reduced by turning back at high temperature. Because the cracks and deformation after wire cutting are suppressed. Machinability and abrasiveness exceed SKD11. Used for precision stamping dies, cold forging, deep drawing dies, etc.
15, SKH-9 - wear resistance, toughness of general high speed steel
Japan Hitachi plant production. For cold forging die, cutting machine, drill, reamer, punch, etc.
16, ASP-23 - powder metallurgy high speed steel
Made in Sweden. Carbide distribution is very uniform, wear resistance, high toughness, easy processing, heat treatment size stability. Used for long life cutting tools such as punches, deep drawing dies, drill dies, milling cutters and shear blades.
