How to Use SKD11 Stamping Die Steel?
1. “Quenched + Tempered” condition
2. “Quenched + tempered + cold treatment” (for high precision and dimensional stability)
3. “Quenched + Tempered + Nitrided” (for high surface hardness)
4. Deep cold treatment to obtain the highest hardness and dimensional stability, mold in the quenching immediately after the deep cooling -70 degrees Celsius to -80 degrees Celsius, keep 3-4 hours, and then tempering treatment, the deep cold treatment of the tool or mold hardness than the conventional heat treatment of hardness is higher than the 1-3 HRC, the shape of the complexity and the size of the large changes in the parts, the deep cold treatment there is a risk of cracking.
5. Nitriding treatment of molds or workpieces after nitriding treatment, the surface formation of a layer of hardened tissue with high hardness and a certain degree of corrosion resistance.
6. In 525 ℃ nitriding treatment, the surface hardness of the workpiece is about 1250HV, nitriding time on the penetration layer as shown in the table below, nitriding time (hours) 203060 nitriding layer depth mm0.250.300.357. In 570 ℃ nitriding treatment, the surface hardness of the workpiece is about 950HV, usually soft nitriding treatment for 2 hours, the depth of the hardened layer can be up to 10-20um.
Grinding processing die blanks or work in a low temperature tempered state, grinding is prone to grinding cracks, to prevent cracks should be taken to a small grinding feed multiple grinding, supplemented by good water-cooled conditions, wire cutting processing complex shape or size of the mold, the final line of the line using wire-cutting processing, usually encountered when the phenomenon of cracking occurs, to prevent cracking, it is recommended that the use of gas quenching and high-temperature tempering treatment to reduce the heat treatment stress, or on the mold surface hardening layer depth can reach 10-20um.
To prevent cracking, it is recommended to use gas quenching and high-temperature tempering treatment to reduce the heat treatment stress or cavity pre-processing treatment of the mold embryo.
What Does Bearing 7005C DB P5 Stand For?
7005C/DF bearings (angular contact ball bearings with ID: 25.0000mm OD: 47.0000mm Thickness: 24.0000mm), a variety of bearings suitable for extreme environments such as high speeds and high loads, and a range of other bearings.
The most commonly used 70 series spindle bearing products are available in a variety of precision grades from P5 to P2. At the same time, in addition to ordinary single-row and double-row combinations, 70 series spindle bearings also provide three-row combinations (DBD, DFD, DTD), four-row combinations (DBB, DFF, DBT, DFT, DTT), etc., and is also equipped with ceramic ball hybrid bearings for users to choose from.
N10 – low heat series bearings are low heat designs of ultra-high-speed single-row cylindrical roller bearings, which are representative of the spindle bearings’ high-end products. N10-Low heat generation series bearings include SUJ2 bearing steel (RS type), high-speed heat-resistant steel (RX type and RXH type) series products, and PEEK resin cage limit temperature of 240 degrees Celsius.
N10-Low heat generation series bearings are one of the world’s few cylindrical roller bearings to achieve high speed and high stiffness, 7005C/DF bearings to improve the performance of the burnout resistance to achieve low heat and high-speed areas of stable operation, 7005C/DF bearings to achieve low heat and stable operation. 7005C/DF bearing high speed, high precision, high stiffness of the three high characteristics and long life characteristics, even if the price is higher, the user still favors 7005C/DF bearings.
Please choose 7005C/DF bearings according to the performance requirements of the equipment.
