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TZM Alloy Boat Bending-Stamping Forming

Sheet bending-forming has been widely used in the aerospace, automotive, electrical appliances, food packaging, household hardware, construction industry and other fields, and it is a very important machining technology. TZM alloy is an excellent molybdenum-based superalloy, and it is often used in aerospace, nuclear power industry, metallurgical industry, electronic industry and metal processing industry and other fields. TZM alloy boat has good high temperature performance, at 1000 ℃ used for containing molybdenum oxide for molybdenum powder production. TZM alloy boat production processes are as follows: mixing-ball-milling - isostatic pressing - sintering - rolling - welding or stamping molding. Considering the production process and product quality, employs bending-stamping on compacted TZM alloy sheet to obtained TZM alloy boat blank with quadrangle. After welding, we can obtain TZM alloy boat which has better performance.

TZM alloy has poor room temperature ductility processing performance and welding performance, so to obtain high performance materials boat, should be strictly controlled bending-stamping forming process.
1. During stamping forming, the seam on circular bead of boat too long or too short is not conducive to final product;
2. The friction coefficient increased from 0 to 0.3, sheet metal equivalent stress strain increases, but not obvious. But when it increased from 0.3 to 0.6, equivalent stress strain shows linearly increase and there are many areas wrinkled and perked.
3. The die gap in the appropriate range for forming effect is not obvious, but too small will cause scratches in sheet extrusion process, and too large it will lead to difficulties in welding.
4. TZM alloy plastic deformation at low-speed stamping is poor, and at high speed and medium speed, the plastic deformation ability is similar. If stamping speed is too low, the sheet metal will rupture, and high speed stamping will lead to overlap of corner angle, so the speed should be controlled within a reasonable range.

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