Beryllium copper, beryllium bronze uses:
Beryllium copper mainly focuses on the various working conditions used in non-ferrous metal low-pressure and gravity casting molds, through in-depth research on the failure causes, compositions and internal relationships of beryllium bronze mold materials and molten metal erosion resistance, and develops beryllium bronze mold materials with high conductivity (heat), high strength, properties, high toughness, and resistance to molten metal erosion, which solves the problems of low pressure and gravity casting molds of non-ferrous metals and easy to crack and wear, and significantly improves the mold life, demoulding speed and casting strength; Overcome the adhesion and erosion of molten metal slag mold; Improved surface quality of castings; Reduced production costs; Make the mold life close to the import level. Beryllium copper hardness HRC43, density 83g cm3, containing beryllium-19-2.15. It is suitable for the inner inserts, mold cores, die-casting punches, hot runner cooling systems, heat conduction nozzles, integral cavities of blow molds, automobile molds, wear plates, etc.
Several heat treatments for Beryllium Bronze:
Beryllium bronze is a very versatile precipitation-hardening alloy. After solution and aging treatment, the strength can reach 1250-1500MPa (1250-1500 kg). Its heat treatment characteristics are: it has good plasticity after solution treatment, and can be deformed by cold processing. However, after aging treatment, it has an excellent elastic limit, and at the same time, the hardness and strength are also improved.
1) Solution treatment of beryllium bronze The heating temperature of the general solution treatment is between 780-820, and 760-780 is used for the material used as an elastic component, mainly to prevent the coarse grain from affecting the strength. The temperature uniformity of the solution treatment furnace should be strictly controlled at 5. The holding time can generally be calculated as 1 hour 25mm, and when the beryllium bronze is treated with solution heating in air or oxidizing atmosphere, an oxide film will be formed on the surface. Although it has little effect on the mechanical properties after aging strengthening, it will affect the service life of the tool and mold during cold working. In order to avoid oxidation, it should be heated in a vacuum furnace or ammonia decomposition, inert gas, reducing atmosphere (such as hydrogen, carbon monoxide, etc.), so as to obtain a bright heat treatment effect. In addition, care should be taken to keep the transfer time as short as possible (during this quenching), otherwise the mechanical properties after aging will be affected. It should not exceed 3 seconds for thin materials and 5 seconds for general parts. The quenching medium is generally water (no heating requirement), of course, oil can also be used for parts with complex shapes to avoid deformation.
2) The aging temperature of beryllium bronze is related to the content of be, and the content of be is less than 21. The alloys should be aged. For be greater than 17 alloys, the best aging temperature is 300-330, and the holding time is 1-3 hours (according to the shape and thickness of the parts). Be is less than 05. High conductivity electrode alloy, due to the increase of melting point, the optimal aging temperature is 450-480, and the holding time is 1-3 hours. In recent years, two-stage and multi-stage aging have also been developed, that is, first at high temperature for a short time, and then at low temperature for a long time to keep warm for a long time, which has the advantage of improving performance but reducing deformation. In order to improve the dimensional accuracy of beryllium bronze after aging, clamping can be used for aging, and sometimes two separate aging treatments can be used.
3) Stress relief treatment of beryllium bronze The stress relief annealing temperature of beryllium bronze is 150-200, and the holding time is 1-15 hours, it can be used to eliminate the residual stress caused by metal cutting, straightening, cold forming, etc., and stabilize the shape and dimensional accuracy of the parts in long-term use.
Features & Applications:
C17500 beryllium cobalt copper has excellent cold working properties and good hot working properties. C17500 beryllium cobalt copper is mainly used as fuse clips, fasteners, spring switches, relay parts.
Chemical Composition: Copper + Specified Element Cu: Margin.
Iron Fe: 010
Cobalt co:24~2.7
Silicon si: 020
Beryllium be: 04~0.7
Al-al: 020