Brazing filler metal for brazing W-Cu composite and Fe-based alloy, method and brazing technique
A technology of composite materials and solders, applied in welding/cutting media/materials, metal processing equipment, welding/welding/cutting items, etc., can solve the connection technology between W-Cu composite materials and Fe-based powder alloys that have not been seen yet problem, to achieve the effect of repeatable brazing process, simple brazing process, and improved mechanical properties
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Embodiment 1
[0030] W-Cu composite material (W accounts for 55% by weight, Cu accounts for 45% by weight) and Fe-based powder alloys (Co10.5%, C2.3%, Cr4.0%, Mo7.0%, W6.5%, V6 .5%, the balance is Fe) Butt joint vacuum brazing: W-Cu composite material and Fe-based powder alloy sample size are both 20mm×20mm×6mm, and the brazing surface is 20mm×6mm.
[0031] The composition and mass percentage ratio of the solder are: Mn7.0%, Co4.5%, Ni0.5%, Zr4.5%, Ti1.5%, and the balance is Cu. The thickness of the solder is 100 μm.
[0032] The method for preparing the solder for brazing W-Cu composite material and Fe-based powder alloy includes the following steps:
[0033] 1) Weigh high-purity 70gMn flakes, 45gCo particles, 5gNi particles, 45gAg particles, 15Ti particles and 820gCu particles according to mass percentage to prepare a mixture, put them into a container with acetone, and conduct ultrasonic cleaning at a temperature of about 20°C 20min;
[0034] 2) Dry the mixture after ultrasonic cleaning in ste...
Embodiment 2
[0046] W-Cu composite material (W accounts for 55% by weight, Cu accounts for 45% by weight) and Fe-based powder alloys (Co10.5%, C2.3%, Cr4.0%, Mo7.0%, W6.5%, V6 .5%, the balance is Fe) Butt joint vacuum brazing: W-Cu composite material and Fe-based powder alloy sample size are both 20mm×20mm×6mm, and the brazing surface is 20mm×6mm.
[0047] The composition and mass percentage ratio of the solder are: Mn8.0%, Co4.0%, Ni1.0%, Zr3.5%, Ti2.0%, and the balance is Cu. According to the preparation method in Example 1, the thickness of the prepared solder is 80 μm.
[0048] The brazing process steps are:
[0049] (1) Preparation stage: clean the end surface of the W-Cu composite material and Fe-based powder alloy sample to be brazed to remove the impurities, oil and oxide film on the surface, and use W28~W7 metallographic sandpaper to grind and smooth the W -Cu composite material, Fe-based powder alloy and solder foil are put together in acetone, ultrasonically cleaned for 20 minutes, a...
Embodiment 3
[0054] W-Cu composite material (W55Cu45, wt%) and Fe-based powder alloy (Co10.5%, C2.3%, Cr4.0%, Mo7.0%, W6.5%, V6.5%, the balance is Fe) Butt joint vacuum brazing: W-Cu composite material and Fe-based powder alloy sample size are both 20mm×20mm×6mm, and the brazing surface is 20mm×6mm.
[0055] The composition and mass percentage ratio of the solder: the composition and mass percentage ratio of the solder are: Mn9.0%, Co3.5%, Ni1.5%, Zr2.5%, Ti2.5%, and the balance is Cu. According to the preparation method in Example 1, the thickness of the prepared solder is 50 μm.
[0056] The brazing process steps are:
[0057] (1) Preparation stage: clean the end surface of the W-Cu composite material and Fe-based powder alloy sample to be brazed to remove the impurities, oil and oxide film on the surface, and use W28~W7 metallographic sandpaper to grind and smooth the W -Cu composite material, Fe-based powder alloy and solder foil are put together in acetone, ultrasonically cleaned for 20 m...
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