Method for manufacturing beryllium bronze explosion-proof hammer
A beryllium bronze and beryllium manufacturing technology, which is applied in the field of explosion-proof tool manufacturing, can solve the problems of coarse structure, high rejection rate and low density, and achieve the effects of uniform and fine grains, high production efficiency and high density.
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Embodiment 1
[0040] A metal mold for manufacturing a beryllium bronze explosion-proof hammer, which includes a horizontally divided upper mold 1 and a lower mold 2; the upper mold 1 is provided with an upper mold half cavity 3, and the lower half mold 2 The upper part is provided with a lower mold half cavity 4 corresponding to the upper mold half cavity 3, and the upper mold half cavity 3 and the lower mold half cavity 4 are closed to form an explosion-proof hammer head cavity.
[0041] The metal mold is made of hot-worked abrasive steel and has a horizontal parting surface. The upper and lower parting surfaces are located on the horizontal center surface of the beryllium bronze explosion-proof hammer head.
[0042] The center of the top surface of the upper mold half cavity 3 is provided with an upper half core 5, and the center of the bottom surface of the lower mold half cavity 4 is provided with a lower half core 6, and the upper half core 5 and the lower half core 6 are cones. The cone-sh...
Embodiment 2
[0050] A method for manufacturing a beryllium bronze explosion-proof hammer using the metal mold in Example 1, which includes the following steps:
[0051] (1) The beryllium bronze alloy is smelted to obtain a beryllium bronze alloy liquid; the beryllium bronze alloy includes the following components by mass percentage: Be 1.80% and the balance of Cu, without Ni; the melting temperature is 1200°C.
[0052] (2) Mold clamping: Pour the beryllium bronze alloy liquid into the storage cavity of the lower half by gravity for 2~5 seconds, close the upper half and the lower half, press and lock, the pouring temperature It is 1200°C. Applied pressure (N) ≥ the horizontal projection area of the entire cavity (mm 2 )×100 (MPa); The pressure lock mold clamping is to use pressure equipment to directly compress the upper and lower molds. The pressurizing equipment is a hydraulic press, the nominal force of the main cylinder is 6000 kN, the upper extrusion cylinder is 3500 kN, and the lower ex...
Embodiment 3
[0057] A method for manufacturing a beryllium bronze explosion-proof hammer using the metal mold in Example 1, which includes the following steps:
[0058] (1) The beryllium bronze alloy is smelted to obtain a beryllium bronze alloy liquid; the beryllium bronze alloy includes the following components by mass percentage: Be 2.00% and the remainder of Cu, without Ni; the melting temperature is 1300°C.
[0059] (2) Mold clamping: Pour the beryllium bronze alloy liquid into the storage cavity of the lower half by gravity for 2~5 seconds, close the upper half and the lower half, press and lock, the pouring temperature It is 1200°C. Applied pressure (N) ≥ the horizontal projection area of the entire cavity (mm 2 )×160 (MPa).
[0060] (3) Pressurized solidification: within 1 to 3 seconds after the clamping pressure is added to the set value, the lower pressure head is used to push the beryllium bronze alloy liquid in the storage cavity to make the alloy liquid enter the explosion-proof h...
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