1, 45 - high-quality carbon structural steel, is the most commonly used medium carbon tempering steel
Main features: the most commonly used medium-carbon tempered steel, good overall mechanical properties, low hardenability, water quenching cracks easily. Small parts should be tempered, large parts should be normalized. Application examples: Mainly used in the manufacture of high strength moving parts, such as turbine impeller, compressor piston. Shafts, gears, racks, worm gears, etc.. Welded parts pay attention to preheat before welding, stress relief annealing after welding.
2, Q235A (A3 steel) - the most commonly used carbon structural steel
3, 40Cr - one of the most widely used steel, is an alloy structural steel
Main features: tempered, with good overall mechanical properties, low-temperature impact toughness and low notch sensitivity, good hardenability, oil-cooled to get high fatigue strength, water-cooled parts of complex shapes are prone to cracking, cold bending plasticity is medium, tempered or tempered cutting and machinability is good, but the weldability is not good, prone to cracking, weld should be preheated to 100 ~ 150 ℃, generally in the tempered condition Used in a general state of tempering, but also can be carbonitriding and high-frequency surface quenching treatment. Application examples: tempering treatment for the manufacture of medium-speed, medium-load parts, such as machine tools, gears, shafts, worm gears, spline shafts, thimble bushing, etc., tempering and high-frequency surface quenching for the manufacture of high hardness, wear-resistant parts, such as gears, shafts, shafts, crankshafts, arbors, sleeves, pins, connecting rods, screws and nuts, intake valves, etc., quenched and tempered at medium temperatures used in the manufacture of heavy-duty, medium-rate impact of the parts, such as pumps, rotors, sliders, gears, pumps, gears, pumps, pumps, pumps, pumps, pumps, pumps, pumps and other parts. Rotor, slider, gears, spindles, rings, etc., after quenching and low-temperature tempering for the manufacture of heavy-duty, low-impact, wear-resistant parts, such as worm gears, spindles, shafts, rings, etc., carbonitriding that is, after the manufacture of larger sizes, low-temperature impact of the toughness of the transmission parts, such as shafts, gears, etc..
4, HT150 - gray cast iron
Application examples: gear box body, machine tool bed, box, hydraulic cylinder, pump body, valve body, flywheel, cylinder head, pulley, bearing cover.
5, 35 - a variety of standard parts, fasteners commonly used materials
Main features: appropriate strength, good plasticity, high cold plasticity, weldability is still good. Cold state can be localized upsetting and drawing. Low hardenability, normalized or tempered after the use of application examples: suitable for the manufacture of small cross-section parts, parts that can withstand large loads: such as crankshafts, levers, connecting rods, hooks and rings, etc., a variety of standard parts, fasteners.
6, 65Mn - commonly used spring steel
Application examples: small sizes of various flat, round springs, cushion springs, spring windings, can also be made of spring rings, valve springs, clutch springs, brake springs, cold rolled coil springs, card springs and so on.
7, 0Cr18Ni9 - the most commonly used stainless steel (U.S. steel number 304, Japanese steel number SUS304)
Characteristics and applications: as a stainless steel heat-resistant steel is most widely used, such as food equipment, general chemical equipment, the original in the energy industry equipment.
8, Cr12 - commonly used cold work mold steel (U.S. steel number D3, Japanese steel number SKD1)
Characteristics and applications: Cr12 steel is a widely used cold work die steel, is a high-carbon, high-chromium type of Leistungen steel. The steel has good hardenability and good wear resistance; Cr12 steel carbon content of up to 2.3%, so the impact toughness is poor, easy to brittle cracking, and easy to form uneven eutectic carbides; Cr12 steel due to good wear resistance, more used in the manufacture of impact loads by the small requirement of high wear-resistant cold punching dies, punches, downward mold, cold heading die, cold extrusion mold punches and concave die, drilling set, gauge, wire drawing dies, embossing dies, and the use of the steel, the steel is a widely used cold work die steel, is a type of high carbon, high chromium type of leucite steel. DC53 is also used in cold drawing dies, wire drawing dies, embossing dies, thread rolling plates, deep-drawing dies and cold pressing dies for powder metallurgy.
9、DC53--Commonly used Japanese imported cold work die steel
Characteristics and applications: high strength and toughness of cold work die steel, Japan, Daido Special Steel (Co., Ltd.) manufacturers of steel. After high temperature tempering with high hardness, high toughness, good line cutting. Used for precision cold stamping die, drawing die, thread rolling die, cold blanking die, punch, etc. 10, SM45 - ordinary carbon plastic mold steel (Japan steel number S45C)
10, DCCr12MoV - wear-resistant chrome steel
Domestic. Cr12 steel with low carbon content, and the addition of Mo and V, carbide inhomogeneity has been improved, MO can reduce carbide segregation and improve hardenability, V can refine the grain to increase toughness. This steel has high hardenability, cross-section in 400mm can be completely quenched, in 300 ~ 400 ℃ can still maintain good hardness and wear resistance, Cr12 has a high toughness, quenching volume change is small, but also has a high wear resistance and good overall mechanical properties. Therefore, it can be used to manufacture large cross-section, complex shape, and good overall mechanical properties.
