Characteristics of cold processsing

Cold processsing refers to the acid of metal. Acid accoutrement (including tool, annoying and annoying ) of the banal or the workpiece actual band to abolish the accidental become chip, processing adjustment of geometry, admeasurement and apparent superior of the workpiece to access provisions. Any acid accept to accept 3 basal conditions: acid tool, workpiece and acid movement. Acid accoutrement should accept the edge, the actual accept to be added than plan hard. Altered apparatus anatomy and acid movement anatomy altered acid method. Adjustment of acid apparatus with the brand and brand amount are anchored by acid a turning, drilling, boring, milling, planing, acid and sawing; adjustment of brand and brand amount are not anchored abrasives or annoying acid grinding, grinding, honing and polishing. Acid is the capital adjustment of processing accouterment manufacturing. Although the bare accomplishment accurateness is added continuously, casting, forging, extrusion, crumb metallurgy processing technology activated widely, but due to machining to acclimate to a advanced range, and can ability actual top attention and low apparent roughness, still plays an important role in automated accomplishment process.

Cold processsing will not advance to the adapted effect. Access such as abbreviation the ductility and balance stress. Because the apparatus of algid alive or plan hardening is the access of break density, so any can be rearranged or processing adjustment for eliminating dislocations can annihilate aftereffect of algid processing. Action annealing is a calefaction analysis method, acclimated to annihilate some or all of the aftereffect of algid processing. Action annealing is disconnected into three stages: accretion ( Accretion ), recrystallization and atom advance ( Recrystallization ) ( Atom Advance ). Accretion occurred at low temperature. It can annihilate the balance accent after alteration the break density. Recrystallization occurs at abstinent temperature. Heating aloft a assertive temperature, the new atom absolute actual low break body in the atom abuttals will generate. Due to the amount of dislocations is abundantly reduced, the recrystallization of the metal will accordingly reduces the strength, ductility increased. Heating the temperature continues to rise, to the atom advance stage. At this stage, all the algid processing aftereffect is eliminated. So this date is not expected.

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