What are the stitching method of metal products
Welding
TZM shows the best welding properties of all molybdenum alloys. Therefore TZM should be chosen for structures which incorporate welded joints. It can be welded by tungsten inert gas(TIG)-welding, see our brochure “Electrodes for TIG-welding” or by electron beam welding in vacuum.
As the welds Can Have Large internal stresses we recommend stress-relieving (: at least 1 hour at 1050℃(1323k) slowest possible furnace cooling. ) after welding. Circumferential welds on cylindrical shapes as well as welds between sheets of large thickness variations should be avoided.
Resistance and plasma-welding are best suited for the welding of small parts (eg production of electron tubes). In special cases we recommend diffusion-and friction-welding.
Riveting
Riveting is the best method of joining brittle refractory metals. It is a sure and simple method by which different materials can be joined. This advantage can outweigh the disadvantages, eg the need for more material and the inabillty to produce a tight seal. Tightness can be achieved anyway by flame-or plasma-spraying the joint with molybdenum.
Brazing
Pure metal brazes (eg Ni, Cu, Pd, Pt, Ti, Zr, V)are recommended for brazing temperatures between 1100 and 1900℃ (1373 and 2173K) whilst alloy brazes (Ni-, Fe-, Co-, Pd-based alloys)are used for liquidus temperatures between approx. Mo-B and Mo-Ru are suitable high-temperature brazes with a liquidus temperature brazes with a liquidus temperature of 1900℃(2173K). If the brazing temperature does not exceed 1100℃(1373K) the hardness of TZM achieved by cold-working can be entirely maintained.
TZM shows the best welding properties of all molybdenum alloys. Therefore TZM should be chosen for structures which incorporate welded joints. It can be welded by tungsten inert gas(TIG)-welding, see our brochure “Electrodes for TIG-welding” or by electron beam welding in vacuum.
As the welds Can Have Large internal stresses we recommend stress-relieving (: at least 1 hour at 1050℃(1323k) slowest possible furnace cooling. ) after welding. Circumferential welds on cylindrical shapes as well as welds between sheets of large thickness variations should be avoided.
Resistance and plasma-welding are best suited for the welding of small parts (eg production of electron tubes). In special cases we recommend diffusion-and friction-welding.
Riveting
Riveting is the best method of joining brittle refractory metals. It is a sure and simple method by which different materials can be joined. This advantage can outweigh the disadvantages, eg the need for more material and the inabillty to produce a tight seal. Tightness can be achieved anyway by flame-or plasma-spraying the joint with molybdenum.
Brazing
Pure metal brazes (eg Ni, Cu, Pd, Pt, Ti, Zr, V)are recommended for brazing temperatures between 1100 and 1900℃ (1373 and 2173K) whilst alloy brazes (Ni-, Fe-, Co-, Pd-based alloys)are used for liquidus temperatures between approx. Mo-B and Mo-Ru are suitable high-temperature brazes with a liquidus temperature brazes with a liquidus temperature of 1900℃(2173K). If the brazing temperature does not exceed 1100℃(1373K) the hardness of TZM achieved by cold-working can be entirely maintained.
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