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Inhaltsverzeichnis
Einführung
O2 steel is a high-quality oil-quenched cold working die steel with high hardness, high wear resistance, good dimensional stability, toughness and machinability. O2 steel is a chromium free cold working die steel. Its main alloy element is manganese(Mn), with a mass fraction up to 1.7%-2.0%. In addition, it also contains a small amount of vanadium(V). These elements improve the hardenability, strength, wear resistance and hardness of the steel.
Why choose O2 tool steel?
Advantages
After proper heat treatment,the hardness of O2 steel can reach 60-62HRC. The high hardness makes it can bear high load and high friction working environment, and reduce the abrasion of molds and tools, extend the service life.
- High wear resistance
Composition resistance: O2 steel contains alloy elements such as chromium, tungsten and vanadium,which significantly improve its wear resistance.
- Good toughness
Although O2 steel has high hardness, it still has good toughness, which can bear certain impact load without prone to brittle fracture.
- Good fatigue resistance
O2 can maintain its strength and hardness under long-term cyclic loads, reducing mold failure due to fatigue.
- Good corrosion resistance
The addition of chromium element makes O2 steel have a certain degree of corrosion resistance and can be used in humid or corrosive environment, and reducing corrosion damage from dies and tools, and extending their service life.
- Good hardenability
O2 steel has good hardenability, which can ensure that the material obtains uniform hardness during quenching process. And also improve the overall performance of dies and tools, reduce the performance differences caused by uneven quenching.
Limitation
- Insufficient impact toughness
O2 steel has relatively low impact toughness,and it is prone to chipping under high impact loads. This makes O2 steel is not suitable for manufacture dies and tools that need to bear high impact, such as in some large stamping dies or cutting tools with high impact loads.
- Poor tempering stability
During the tempering process, its performance stability is relatively poor, and it is easy to experience the hardness loss and dimensional changes. This requires that the tempering temperature and time must be strictly controlled during the heat treatment process to ensure that the performance of the material meets the requirements.
- Limited hardenability
Although the hardenability of O2 steel is improving compare to ordinary carbon steel, its hardenability is still limited compare to some high performance alloy steel. This makes O2 steel may can not completely harden when manufacturing large dies or thick-section parts, and may results insufficient internal hardness.
- Limited corrosion resistance
Although O2 steel contains elements such as chromium and has a certain degree of corrosion resistance,its corrosion resistance still not as good as some stainless steel or high alloy die steel. In highly corrosive environment, O2 steel may require additional surface treatment or coating to improve its corrosion resistance.
- Higher processing difficulty
The high hardness of O2 steel is helpful to improve the wear resistance,but also increase the difficulty of processing, especially in cutting, drilling, and grinding. When processing O2 steel, the tools wear out quickly,and high quality tools and optimized processing parameters are required.
Anwendungen
Mold manufacturing
Punching molds: Used to manufacture punching, blanking, piercing and other punching molds. The high hardness and wear resistance of O2 steel can effectively reduce mold abrasion and extend its service life.
Forming molds: Suitable for manufacturing forming dies such as bending, stretching, flanging,etc.Good dimensional stability and toughness enable it to bear complex forming processes.
Precision molds: Used for manufacturing high precision molds, such as electronic products and molds for precision parts. Its high hardness and good dimensional stability can ensure the accuracy of the molds.
- Mechanical Manufacturing
Cutting tools: Used for manufacturing cutting tools such as milling cutters, turning tools, drill bits, etc. The high hardness and wear resistance of O2 steel enable it to withstand high-load cutting.
Mechanical parts:Used to manufacture some mechanical parts that require high wear resistance and a certain toughness,such as gears,shaft parts,etc.
- Automobile Manufacturing
Automobile parts molds: Used to manufacture automotive stamping parts molds, such as body cover molds,engineer parts molds, etc. O2 steel can bear the high load and high precision requirements in the manufacture process of automobile.
Automobile tools: Used to manufacture tools of automobile repair and manufacturing processes, such as wrenches, screwdrivers, etc.
- Electronics Industry
Electronic component molds: Used to manufacture molds of electronic products, such as molds of mobile case,computer components molds. The high precision and wear resistance can ensure the quality of electronic components.
Electronic tools: Used to manufacture tools using in manufacturing electronics process, such as electronic welding tools, electronic testing tools.
Schlussfolgerung
O2 steel is an oil quenched cold working die steel with high hardness, high wear resistance,good dimensional stability and toughness. It is widely used in mold manufacturing, mechanical processing,automobile manufacturing,electronics and home appliances industries,especially suitable for manufacturing high-precision blanking dies,cutting tools and mechanical parts. Although its impact toughness is slightly weaker and its tempering stability is limited, O2 steel is still an ideal choice for manufacturing high precision cold working molds due to its high cost-effectiveness and excellent processability. It can meet the needs of a variety of complex working conditions and help industrial production run efficiently and stably.
FAQ
How is the wear resistance of O2 steel?
O2 steel has very good wear resistance,mainly due to its high hardness and the addition of alloying elements such as manganese and vanadium.It is suitable for making mods and tools that require high wear resistance,such as blanking dies and cutting tools.
How is the toughness of O2 steel?
O2 steel still has a certain toughness under high hardness and can bear a certain impact and loads.However,its impact toughness is relatively low and it is easy to break under high impact loads.Therefore,it is necessary to weigh the specific application requirements when selecting materials.
How is the corrosion resistance of O2 steel?
O2 steel has a certain corrosion resistance,but not as good as stainless steel or high alloy mold steel.In highly corrosive environments,additional surface treatment or coating may be required to improve its corrosion resistance.
