Hongyuan supplies imported DC53 mold steel wholesale and what is the price of DC53?

Steel
Mold steel
Datong, Japan
Pre-hard material
Clinker
Price
Heat treatment material
Hard material
Steel plate
Round bar
Introduction
It is a new type of cold work die steel improved by Japan's Daido Special Steel. Its technical specifications are set out in Japanese Industrial Standards. It overcomes the weaknesses of high-temperature tempering hardness and toughness, and will completely replace the high-strength and toughness general-purpose cold work die steel in the field of general and precision molds.
With appropriate heat treatment, the strength and toughness are excellent, and high temperature tempering hardness can be achieved.
The toughness is more outstanding among cold work die steels. The tools manufactured with it rarely have cracks and cracks, which greatly improves the service life.
The residual stress after wire cutting is reduced by high temperature tempering. Therefore, cracks and deformation after wire cutting are suppressed for large molds and molds requiring precision.
Practical characteristics
Advantages in online cutting
Applications
Blanking molds, cold forming molds, cold drawing molds
Forming roll punches
●Precision stamping mold.
●Precision blanking dies for wire cutting processing and stamping dies for various purposes.
●Tools for plastic deformation of difficult-to-machine materials.
●Dies for cold forging, deep drawing and wire rolling.
Others
●High-speed blanking punches for stainless steel plates.
●Factory state
Chemical composition
Carbon
Silicon
Manganese
Chromium
Molybdenum
Vanadium
Phosphorus
Basic properties
Under conventional heat treatment conditions, the retained austenite is almost completely decomposed. Generally, cryogenic treatment can be omitted, and high toughness can still be maintained under relatively high hardness.
Experimental Design
Once
After quenching at ℃ and tempering at high temperature at ℃, the hardness can reach up to 100%, which is the highest among the commonly used cold work die steels at present, and the cutting and grinding properties are good. The residual stress of the electrically processed altered layer is small, there is very little retained austenite, and the carbides are fine and evenly distributed.
Due to the complex stress conditions of the mold, some mold working parts need to have some special mechanical properties. If the standard heat treatment process is often used, the ideal working performance requirements cannot be achieved. The hardness, toughness and wear resistance need to be improved through heat treatment. The basic characteristics must be appropriately adjusted to achieve the best working condition of the mold. Fire temperature and tempering temperature are the main process parameters of heat treatment. This article focuses on the tempering characteristics.
2
In the experiment, some slight changes were made to the heat treatment specifications, the quenching temperature was appropriately adjusted, and the tempering temperature was adjusted, that is, ℃, ℃, ℃, ℃, ℃, ℃. Tempering at ℃ is heated by a type drying oven, and the rest is heated by a type box-type resistance furnace. Two samples are taken for each tempering temperature.
The hardness test uses the metal Rockwell hardness test, which is carried out at room temperature and uses a Burawoy optical hardness tester.
The impact test uses unnotched specimens and is conducted on an impact testing machine. The impact energy is Hardness, the hardness value at each tempering temperature is obtained. Based on the hardness value of each sample, the hardness value does not change much when tempered at ℃. The hardness is slightly higher when tempered at medium temperature at ℃. The hardness peak value after standard heat treatment and tempering Generally at around ℃, after tempering at high temperature, the hardness drops significantly, and the average hardness value is only 0, so the tempering temperature should not be too high.
2.Impact toughness
After tempering, grind off the oxidation and decarburization layer on the surface of the sample, and measure the impact value of each sample at different tempering temperatures. Combined with the impact value of each sample, at ℃ When tempered, the average impact value reaches/above ℃. When tempered, the impact toughness is poor and shows a certain high temperature tempering property. The impact toughness of tempering above is very good, but the hardness is greatly reduced and cannot meet the use requirements
Experimental results show that the overall tempering stability is good. Within a certain tempering temperature range, the hardness and impact value change little. When tempered at ℃, the toughness decreases significantly, and temper brittleness occurs. When tempered at ℃, the test Such toughness is very high, the impact value reaches /, but the hardness drops significantly. In production, for some cold work molds that do not require high hardness, wear resistance, and high toughness, high-temperature tempering can be used, which requires high hardness and at the same time. For cold work molds with higher toughness, it is advisable to use low-temperature tempering at about ℃. The hardness and impact value at the tempering temperature can be predicted using appropriate calculation methods (such as interpolation method function approximation, etc.), and then the fire state can be verified by experiments. The carbides in the sample are distributed in intermittent thin strips. After tempering at ℃, the carbides are evenly distributed, and there are almost no large carbides in the structure, so the toughness is good. Judging from the fracture morphology, the fracture surface of the tempered structure at ℃ The cleavage steps are much less than that of the quenched sample. There are some small and shallow dimples on the fracture surface in the metallographic phase, indicating that it has a certain degree of toughness. After fire, the residual austenite is fully transformed, and the carbides are fine and evenly distributed, making the toughness Increase
Conclusion
1. After appropriately adjusting the quenching temperature, the hardness and impact toughness are higher when tempered at ℃. The hardness is higher when tempered at ℃, and the toughness drops significantly. The impact toughness is very low when tempered at ℃. High, the hardness decreases significantly
2. Tools and molds such as precision punching molds with complex shapes, trimming dies, cold rolling rollers, etc. should adopt a low-temperature tempering process so that the working parts of the mold can obtain high hardness, high toughness, good wear resistance, high strength, and can be effectively extended Mold life and prevent early failure phenomena such as excessive wear, deformation and cracking
⒊Complex molds subject to large impact loads can use low quenching and high recovery processes to obtain higher impact toughness and prevent brittle fractures in the mold
Mechanical properties
Hardness annealing, quenching
Main characteristics
Good machinability and grindability. It has excellent machinability and grindability, so the life of the processing tool is longer and the number of processing man-hours is saved.
Advantages in heat treatment: The quenching and hardening energy ratio is high, so it can improve the defect of insufficient hardness during vacuum heat treatment.
Advantages in wire cutting processing High-temperature tempering can reduce residual stress and eliminate residual Wasten iron, which can prevent cracks and deformation caused by wire cutting processing.
Advantages of surface hardening treatment After surface hardening treatment, the surface hardness ratio is high, so the mold performance can be improved.
Advantages in repair welding operations: Since the preheating and postheating temperatures are both relatively low, repair welding operations are relatively simple. Features General purpose cold work die steel, high hardness, high toughness die steel
Main uses
High temperature tempering can be achieved, which is beneficial to precision blanking dies and various purpose stamping dies for wire cutting processing.
Tools for plastic deformation of difficult-to-machine materials.
Dies for cold forging, deep drawing and wire rolling.
High-speed blanking punch stainless steel plate punch