molybdenum and tungsten and molybdenum products draft tube Precautions

 1, custody
Easily oxidized tungsten and molybdenum products, discoloration, shall be kept at a humidity of 60% or less, the temperature below 28 ℃, and with other chemical category isolated environment.
Oxides of tungsten and molybdenum products soluble in water, acidic, please note!
2, pollution embrittlement
(A) at high temperature (close to the melting point of metal), the Council and other metals (iron and its alloys, nickel and its alloys, etc.) react sometimes make material embrittlement, tungsten and molybdenum products during heat treatment, it should be noted !
(2) heat treatment in vacuum (10-3Pa or less), reduction (H2) or an inert gas (N2, Ar, etc.) atmosphere. Tungsten and molybdenum products react with carbon becomes brittle, and therefore a temperature above 800 ℃ heat treatment, do not touch. But Molybdenum Products at 1500 ℃ or less, since carbonation degree of embrittlement caused by very small.
3, machining
(1), tungsten and molybdenum sheet products bending, punching, shearing, cutting, processing at room temperature is easy to produce cracks, to heat treatment. Meanwhile, improper processing, sometimes produce layered, so heat treatment is recommended.
(2), but the molybdenum plate above 1000 ℃ embrittlement when heated, causing processing difficulties, should be noted.
(3), mechanical grinding of tungsten and molybdenum products, it should be selected for a variety of occasions polishing method.
4, oxide removal
(1), easily oxidized tungsten and molybdenum products have the features. Severe oxide to be removed, please entrust the Company or with a strong acid (hydrofluoric acid, nitric acid, hydrochloric acid, etc.) handling, operation, please note.
(2), use the Add mild oxide abrasive cleaning agents, with a soft cloth or sponge to wipe, then wash with warm water.
(3), wash the product will lose metallic luster, please note.
5, Caution
(1), tungsten and molybdenum sheet as sharp as knives, and the angle and the end of the burr has cut the risk of hand, the use of products, please wear protective gear.
(2), tungsten density of about 2.5 times the iron, molybdenum, iron density of about 1.3 times the actual weight much heavier than the visual appearance, it may hurt when manual handling personal. Try the following suggestions in 20KG weight for manual operation.
6 Handling Precautions
Tungsten and molybdenum products is brittle metal, easy to produce cracking, delamination; thus transported, note Do not give and shock and vibration, such as dropping, etc..
In addition, the packing, please fill cushioning material.