Tungsten Copper Sheet Cold Rolling Method
Tungsten Copper Sheet Cold Rolling Method
Tungsten copper alloy material has both tungsten's high strength, high hardness, low coefficient of expansion and other characteristics, but also has copper's high plasticity, good electrical and thermal conductivity and other properties, the LSI and high power microwave devices, tungsten copper alloy material as the substrate, embedded blocks, connectors and cooling components developed rapidly. However, when tungsten copper alloy used as electronic packaging materials, the density must be greater than 98% theoretical density, in order to ensure high thermal conductivity, thereby increasing the density of tungsten copper alloy is the key of material properties of tungsten-copper alloy guarantee.
However, the processing method of the prior tungsten-copper alloys are a series of problems, first of all issues involved in the production cycle is too long, generally 2 a 3 production process to produce tungsten copper alloy sheet thickness lmm following example, its production cycle for at least 2-5 days; the second is the high energy consumption: forging, rolling, annealing and other processes required high-power high-temperature furnace, high energy consumption; and the low yield of the prior art methods, processed at high temperatures can easily cracking scrap to produce lmm thickness of tungsten copper alloy sheet, for example, it was only about 50% of overall finished product; in addition, the prior art methods using equipment investment, greater variety and quantity, and most high-power and high tonnage processing equipment, requires a large processing site.
The technical problem to be solved of tungsten copper sheet cold rolling method is to overcome the prior art tungsten copper alloy sheet production cycle is too long, high energy consumption, low yield, at high temperatures can easily cracking scrap processing, and equipment investment, greater variety and quantity, most high-power and high tonnage processing equipment, requires a large processing facilities and other defects. Tungsten copper sheet cold rolling method can significantly improve the cold plastic tungsten copper alloy, continuous production cycle is short, low energy consumption, high efficiency, low investment in equipment, occupying small space, suitable for large-scale industrial production.
Tungsten Copper Sheet Cold Rolling Method Example CaseTungsten copper sheet thickness of 1.5mm cold-rolled method comprises the following steps: 1. 5mm tungsten copper alloy sheet thickness 15 times for 10 a cold working, get 0. 9mm thick tungsten copper alloy sheet can be; which, the multi-pass cold rolling pass reduction of 0. 05mm; rolling pressure of 30MPa; rolling speed is 0. 05m / s.
Wherein, 1. 5mm tungsten copper alloy sheet according to the thickness obtained by the following method: 1 9mm thick copper alloy thin sheet green tungsten (tungsten 80wt%, copper 20wt, commercially available, with the following examples here), which in a hydrogen atmosphere in a high temperature furnace continuously push the boat liquid phase sintering, which push the boat speed is 0. 15cm, min; Sintering temperature is 1450 0C; holding time of 2.5 hours.
After calculation, the relative density of the present embodiment reaches the product prepared in Example 99.5, a yield of 96, the production cycle for 1 day.
The positive effect of tungsten copper sheet cold rolling progressive approach that the method of tungsten copper alloy sheet direct multi-pass cold rolling, cold high plasticity; short production cycle, in order to produce thin thickness 0. 5mm or less, for example, can completed within 1 day; and the method according to the requirements of the finished product, the flexibility to adjust the size of the sintered alloy, is easy to eliminate plastic deformation during thermal processing and produce inconsistent interface cracking defects, to produce a 0. 5mm thickness of tungsten-copper alloy sheet, for example, its overall yield up to 95%; and a small investment in production equipment used in the process, take a small space, especially for industrial production.
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