Due to the hard and brittle characteristics of molybdenum, molybdenum is difficult to process metal, yuanda engaged in molybdenum and tungsten processing for many years, now talk about my understanding of molybdenum and tungsten processing nuts and screws.

Molybdenum tungsten processing production is powder metallurgy or vacuum smelting production ingots, and then plastic processing process to produce for processing parts of the plate, belt, foil, tube, rod, wire. The following points should be noted for the successful processing of these materials into parts required by industry.

First is the tool, for pure molybdenum choose ordinary carbide tool, molybdenum alloy choose YG8 can. Molybdenum material rigid, strong binding force, not easy to deformation, the pin knife should be sharpened when turning, the knife before and after the blade should be very clean, slightly increase the front Angle, and then choose the medium speed of cutting speed and a little bit more feed. Generally no cutting fluid is used. Pick up is a key point in molybdenum processing, the key to do well is patience, the knife should be carefully grinding, sharp and Angle is the key, moderate speed, small amount of feed, concentration, repeated, after the position with fine triangle file down burr at medium speed, to ensure smooth mouth. Molybdenum seed crystal chuck has high requirements on concentricity, pay more attention in the process of processing, each change should be marked table, to ensure concentricity.

Molybdenum plate processing, there are basically five conditions, namely drum, twist, bending, stamping, punching. According to the thickness of molybdenum plate, generally under 1mm at room temperature can be completed deformation operation, more than 1.0 need to be baked hot, to prevent stratification or fracture, more than 2.0 need to be heated to the plate red (dark red) about 500 degrees, but to prevent overheating molybdenum recrystallization, will make the parts become brittle, affect the safety and service life. When bending the bending crankshaft to perpendicular to the main binding direction, the small workpiece on the selection of cross binding plate. The stamping precision of molybdenum parts is very high, because molybdenum is not easy to deformation, processing should be heated, adjust the stamping speed, make it suitable with the deformation speed of molybdenum, this should be done according to the specific degree of deformation.

Molybdenum deep hole tapping, because molybdenum has a high wear resistance, general tapping dozens of nut taps will wear and replace, in the drilling than the standard hole is slightly larger, this should be well controlled, to ensure that the height of the silk teeth is not less than 70% of the standard, the mechanism speed is medium, otherwise it will make the parts broken. Deep hole tapping (depth more than 3 times the aperture above) to do 3 should be replaced tap, otherwise it will send a sharp sound, tap fracture, scrap parts, causing great loss.

Due to the hardness of molybdenum and high friction, in the cutting or drilling pin in the cutting surface will produce high temperature hard point, if the operation will make the tool severe wear annealing, appear in time on the blade coated with some oil will be solved.

In the process of tungsten and molybdenum rolling, forging, turning, drilling, grinding will produce metal dust, inhalation of human will be very harmful, tungsten and molybdenum processors to protect themselves first, in this condition to study the production and processing of rare metals.