We use a variety of materials when we make non-standard customizations. What are the characteristics of these different materials? Today, CNC machining plants will sort out the following common material characteristics for you:
1,45-High-quality carbon structural steel, the most commonly used medium-carbon tempered steel
Main features: The most commonly used medium-carbon quenched and tempered steel, with good comprehensive mechanical properties, low hardenability, and easy to crack during water quenching. Small parts should be tempered, and large parts should be normalized. Application examples: Mainly used to manufacture high-strength moving parts, such as turbine impellers, compressor pistons, shafts, gears, racks, worms, etc. Pay attention to preheating before welding and annealing for stress relief after welding.
2. Q235A (A3 steel)-the most commonly used carbon structural steel
Main features: high plasticity, good toughness, good welding performance, good cold stamping performance, good strength, good cold bending performance. Application examples: Widely used in general requirements of parts and welded structures. Such as rods, connecting rods, pins, shafts, screws, nuts, rings, brackets, bases, building structures, bridges, etc.
3. 40Cr-one of the most widely used steels, belongs to alloy structural steel
Main features: After quenching and tempering, it has good comprehensive mechanical properties, low-temperature impact toughness and low notch sensitivity, good hardenability, high fatigue strength when exposed to oil, and parts with complex shapes when exposed to water. Easy to produce cracks, cold bending plasticity is medium, good cutting performance after tempering or tempering, but poor weldability, easy to produce cracks. Application example: After quenching and tempering, it is used to process medium-speed and medium-load parts such as machine tool gears, shafts, worms, spline shafts, and sleeves. After quenching, high-frequency surface quenching is used to process gears, shafts, spindles and other high hardness , High wear-resistant parts, crankshafts, mandrels, bushings, pins, connecting rods, nuts, intake valves, etc., after quenching and tempering at medium temperature, they are used to manufacture heavy-duty and medium-speed impact parts, such as oil pump rotors, Sliders, gears, spindles, collars, etc., used to manufacture heavy-duty parts, low-impact wear resistance after quenching and low-temperature tempering of worms, spindles, shafts, collars, etc., large-size shafts, gears, etc., high and low temperature impact The tough transmission parts are manufactured at the carbonitriding site.
4. HT150-gray cast iron
Application examples: gearboxes, machine tools, boxes, hydraulic cylinders, pump bodies, valve bodies, flywheels, cylinder heads, pulleys, bearing caps, etc.
5. 35- Common materials for various standard parts and fasteners
Main features: suitable strength, good plasticity, high cold plasticity, good weldability.. It can be upset and drawn in the cold state. Low hardening, normalizing or tempering application examples: suitable for manufacturing small cross-section parts, parts that can withstand large loads: such as crankshafts, levers, connecting rods, shackles, etc., various standard parts and fasteners.
6. 65Mn-commonly used spring steel
Application examples: various flat springs, round springs, cushion springs, spring hairs in small sizes, spring coils, valve springs, clutches**, brake springs, cold coil springs, clamp springs, etc. can also be made.
7. 0Cr18Ni9- the most commonly used stainless steel (American steel 304, Japanese steel SUS304)
Features and applications: As the most widely used stainless steel heat-resistant equipment, such as food equipment, general chemical equipment, etc., it was originally used in industrial equipment.
8. Cr12-Common cold work die steel (American steel D3, Japanese steel skd1)
Performance and application: Cr12 steel is a widely used cold die steel, belonging to the high carbon type and high chromium type of Laplace steel. The steel has good hardenability and wear resistance; due to the carbon content of Cr12 steel As high as 2.3%, its impact toughness is poor, brittleness is large, and uneven eutectic carbides are easily formed; due to its good wear resistance, Cr12 steel is mainly used to make cold punching dies, punches, blanking dies, cold heading dies, etc. , Powder metallurgy with low impact load, high wear-resistant drill sleeves, gauges, drawing dies, punching dies, coils, drawing dies, cold pressing dies and other punching dies.
9. DC53-Japan imported cold die steel
Features and applications: Japan’s Datong Special Steel (Factory) steel grade high-strength and toughness cold work die steel. After high temperature tempering, it has high hardness, high toughness and good wire cutting performance.. It is suitable for precision cold punching dies, drawing dies, thread rolling dies, cold punching dies, punches, etc.,
10. DCCr12MoV- wearable chromium steel
Compared with Cr12 steel, Mo can reduce carbide segregation and improve hardenability. V can refine grains and improve toughness. The steel has high hardenability. The cross section can be completely quenched below 400mm, and it can still maintain good hardness and wear resistance at 300~400°C. It has higher toughness than Cr12, small volume change during quenching, high wear resistance, and good comprehensive mechanical properties. Therefore, we can manufacture all kinds of molds with large cross-sections, complex shapes and high impact force, such as ordinary drawing dies, punching dies, punching dies, blanking dies, trimming dies, rolling dies, drawing dies, cold Extrusion dies, cold shears, circular saws, standard tools, measuring tools, etc.
11. SKD11- ductile chromium steel
Hitachi Co., Ltd. of Japan. The casting structure in the steel has been technically improved, and the grains have been refined. Compared with Cr12MoV, its toughness and wear resistance have been improved to extend the service life of the mold.
12. D2-High carbon and high chromium cold work steel
It is made in the United States. It has high hardenability, hardenability, wear resistance, high temperature oxidation resistance, good corrosion resistance after quenching and polishing, and small heat treatment deformation. It is suitable for manufacturing various cold-working molds, tools and measuring tools with high precision and long life. , Such as drawing dies, cold extrusion dies, cold cutting knives, etc.
13, SKD11 (SLD)-non-deformation toughness high chromium steel
Hitachi Co., Ltd. of Japan. Due to the increase in the content of Mo and V in the steel, the casting structure, grain refinement and carbide morphology of the steel are improved, so that the strength and toughness (bending strength, deflection, impact toughness, etc.) of the steel are higher than skd1, D2, and it is resistant to Grindability is also improved, with higher fire resistance, it has been proved that the life of steel molds is better than Cr12mov.. Often high-demand molds, such as drawing molds, impact grinding wheel molds, etc., are manufactured.
14. DC53-high toughness and high chromium steel
Produced by Datong, Japan. The heat treatment hardness is higher than SKD11 high temperature (520-530) after tempering to reach 62-63HR C high hardness, and it exceeds SKD11 in strength and wear resistance of DC53. Toughness is twice that of SKD11. In the manufacture of cold working molds, the toughness of DC53 rarely cracks and cracks. Greatly improve the service life. Small residual stress reduces the residual stress after high temperature. Because the cracks and deformation are suppressed after wire cutting, cutting and grinding on SKD11. Suitable for precision punching dies, cold forging, deep drawing dies, etc.
15. SKH-9-Ordinary high-speed steel with high wear resistance and toughness
Hitachi Co., Ltd. of Japan. Suitable for cold forging dies, cutting machines, drills, reamers, punching machines, etc.
16. Asp-23 powder metallurgy high speed steel
Swedish. The carbide distribution is very uniform, wear-resistant, high toughness, easy to process, and stable in heat treatment. It is used for long-life tools such as punches, drawing dies, drilling dies, milling cutters, and blades.
17, P20-General size plastic mold
Produced in the United States. Can be operated by electro-erosion. Factory pre-hardened hb270-300 quenching hardness HRC52.
18. 718-Required large and small plastic molds
Swedish. Especially for electro-erosion operations: factory pre-hardened hb290-330 quenching hardness HRC52
19. NAK80-high mirror high precision plastic mold
Japan Daido Co., Ltd. Factory conditions are pre-hardened HB370-400. Quenching hardness hrc52
20.S136-Anti-corrosion and mirror polished plastic mold
Made in Sweden, factory pre-hardened HB<215, quenching hardness HRC52.