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How to improve the structure of heat treatment process.
High frequency quenching of gears
How to improve the structure of?heat treatment?process.
In the part?structure design should pay attention toimproving the heat treatment?process,?the?structure design of parts?of heat treatment?requirements:
1)?sharp edge?angle?to?blunt?or?rounded corners.
2)?try to?make parts?area?evenly,?mass balance.?When necessary,?additional?technical holes or?process?slot,?andreasonable distribution of?the position of?the position and number.
3)?the slender?shaft?is too large?than the.
4)?hole?requires?hardening,?strain?through?bolt holes.Between the?hole and the?hole or hole?and edge?should have a certain?distance.?If possible,?at the bottom of the holecan be?drilled?in the?transverse,?improve the cooling condition?when quenching?hole.
5)?improve parts?structure?rigidity,?when necessary,additional?ribs.
6)?should be?simple,?symmetric?geometry.
7)?prior to heat treatment?to have a certain?surface roughness.?Surface?hardened parts?roughness?not larger than Ra3.2?μ m;?nitriding?workpiece surface roughness?value,brittle?value,?hardness?measurement?is not accurate,general requirements for Ra?in 0.80~0.10?μ m;?carburizing parts surface roughness less than Ra6.3 μ?M. The surface can not have deep impression, key parts cannot have.
8)?a particularly complex shape?or?different parts have different?performance requirements,?in the possible situation?can be changed into?composite structure.?Thelong,?thin?long?parts,?the structure?may be?spliced,?should as far as possible?splicing.
9)?avoid?matching with the?hole,?carburizing,?nitridinglocal?local.
10)?to the large,?long?piece,?design should be considered when the?clip,?hanging?for?heat treatment.
11)?high frequency quenching?site?should try to avoid?holes or grooves.?A hole or?slot?can not be avoided,?the edgemust be?chamfered,?keyway?in?circular arc?chamferinggroove.
12)?with?key hole?sleeve and the?gear,?cylindrical?or toothfor?high-frequency quenching,?the wall thickness of?the minimum size?limits,?in order to avoid?the error of deformation.
In addition,?the parts of the structure?shape and the?heat treatment?process and?the?selection of?a certain relationship?equipment.?For example,?the elongated?elements shall be made of?well type furnace?hanging?heating.?Heat treatment process parameters?not only?according to thematerials used?to determine the?shape and size,?but alsoshould be based on?factors such as?parts?to adjust.Quenching,?elongated?and cylindrical?parts should beaccording to the length?direction of?quenched into themedium;?disc?parts?should be?radial?and?transverse?quenched into?move around;?long?blade?should make the?edge?at the same time?first in?quenching liquid?sheet?with?holes,grooves,?all?parts?should be chosen so that the?easydirection of?flow of?liquid quenching?quenching.?In short,parts of the structure?should be?heat treatment processesand?the required?adaptation.