These you all know that in the forging process

Views: 1     Author: Site Editor     Publish Time: 2016-09-18      Origin: Site

Tend to exist some shortcomings in the forging process, the following will summarize some for you.
1. The large grain size
Large grain size is usually caused by a lack of forging temperature and deformation degree, or finish forging temperature is too high, or caused deformation degree fell into the critical deformation zone.Aluminum alloy deformation degree is too big, form texture;High temperature alloys deformation temperature is too low, the formation of deformation mixed can also cause bulky grain, coarse grains will reduce the plasticity and toughness of forgings, fatigue performance significantly decreased.
These you all know that in the forging process
2. Uneven grain
Uneven grain size refers to the special thick grain forging parts, some parts are small.Produce uneven grain is the main reason of the billet throughout the deformation uneven grain crushing degree is differ, or local deformation degree fell into the critical deformation zone, or high temperature alloy local work hardening, or quenching heating local coarse grains.Heat resistant steel and high temperature alloy particularly sensitive to uneven grain.Uneven grain will make the forgings durable performance, fatigue performance significantly decreased.
These you all know that in the forging process
3. The phenomenon of cold hard
Deformation due to the low temperature or deformation speed too fast, and too fast cooling after forging, both may be caused by recrystallization softening couldn't keep up with the deformation caused by the reinforcement (hardening), so that the hot forging forgings after internal organization is still keeping the cold deformation.The existence of this organization to improve the strength and hardness of the forgings, but reduces the plasticity and toughness.Serious hard phenomenon may cause cold forging cracking.
These you all know that in the forging process
4. The crack
Crack is usually existed during forging large tensile stress, shear stress or stress caused by William gallas.Crack parts is often happened in billet the thinnest part of the largest stress and thickness.If the billet surface and internal micro cracks, or blank within tissue defect, improper or hot working temperature to lower material plastic, too much too fast or deformation, deformation degree, more than material allows the plastic handle, etc., are removed from the coarse, long pull, punching, reaming, bending and extrusion process can produce crack.
These you all know that in the forging process
5. The crack
Cracks is present shallow tortoise in forging surface shape crack.The surface of the tensile stress in the forging forming (for example, not full of extruding part or the curved part) are most likely to produce this kind of defect.Cause the cause of cracks may be various:
(1) raw materials of fusible element such as Cu, Sn and too much.
(2) when heated to high temperature for a long time, steel material surface of copper precipitation and surface coarse grains, decarburization, or after a lot of heating surface.
(3) fuel sulfur content is exorbitant, sulfur impregnation steel material surface.
These you all know that in the forging process
Above are some of the defects existing in the forging process, the hope can help to you.

  • Q Are you a manufacturer or a trader?

    We have our own foundry ,forging factory and machinery shop located in Liaoning Province, China.
  • Q What can you do for customer?

    One Stop Service
    1).Manufacturing and supply various machinery parts.
    2). Technical analysis and design 
    3).Factory audit, on-site production supervision, in-time feedback, pre-shipment quality inspection
  • Q How could you commit the product quality?

    1) all our factories were ISO certified. 
    2) more than 50% of New Densen’s products were sold to worldwide top 500 companies 
    which located in North American, Western Europe, and Japan.
    3) New Densen’s QC engineers will do on-site supervision and before EX-work quality inspection. New Densen will issue inspection reports for customers’ approval before EX-work. New Densen will be responsible for its reports and every parts no matter how long sold to customers.
  • Q How long shall we get the quotation?

    Processing time for inquiry: 1-3 working days.