ANSI/AGMA C08 includes updated and extensively revised information from ANSI/AGMA B89 along with additional information needed to achieve . Download ANSI-AGMA B Gear Materials and Heat Treatment Manual. Index of AGMA Standards and Information Sheets by Number. 1 ANSI/AGMA B89 Gear Materials and Heat. Treatment Manual.
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Item Detail – ANSI/AGMA C08 (reaffirmed March )
Microcracks can result which can reduce fatigue strength to a moderate degree. This method produces a closer toleranced piece, generally smaller than an open die forging. Therefore, the hardness obtained at any location on a part will depend on carbon content, hardenability, part size, configuration, aagma media, and quenching conditions.
In the latter process, full coverage has been achieved when no traces of the dye remain when viewed under ultraviolet light. 204-b89 and tempered gearing changes size and distorts due to mechanical and thermal stresses and microstructural transformations.
The load in kilograms force listed in Table should agka used. Each design above can be made aga forging or weld fabrication. When a tooth is through hardened, effective case depth does not apply. Overheating can result in cracking. The powder metal process is used to reduce cost by eliminating machining operations, provide accurate dimensional control over large production runs, and obtain characteristics and shapes difficult to obtain by other methods.
Distortion must be minimized, controlled and made predictable to minimize costly stock removal lapping, skiving, or grindingwhen tooth accuracy requirements dictate. An upset forging is produced when the billet is initially hot worked in one direction, and then is rotated 90 degrees and hot worked again. Nitrided gears should not be specified if shock loading is present, due to inherent brittleness of the case. Work continued on the Standard with numerous additional revised drafts within the Metallurgy and Materials Committee until it was balloted in Minimum hardness requirements for the classes of cast iron are shown in Table Commercial flat or plate steel of numerous carbon and alloy grades is available in standard thicknesses in a wide range of widths and lengths.
Carbon content over 0. Wear resistance of these aga is somewhat lower than for the higher strength manganese bronzes. Hot rolled bars are also now manufactured from continuous cast steel bar manufactured with continuous casters. The ion nitride process uses ionized nitrogen gas sgma effect nitrogen penetration of the surface by 2040-b89 bombardment. Transformation in the case results in growth which sets up residual surface compressive stress.
Annealed or normalized ductile cast iron has good machinability. For more information, consult the following: Need more than one copy? Shapiro Arrow Gear W. An encircling coil or tooth by tooth inductor is used for induction hardening. Use of electron beam heat treating for gear 5. When four hardness tests are required, two tests should be made on the cope side, one over a riser and the other approximately degrees away between risers, and two tests on the drag side 90 degrees away from the tests on the cope side.
Calcium additions in steel making form hard, irregular inclusions and can also benefit machining. Modified methods of quench hardening, such as austempering of ductile iron, reduces distortion and forms a modified hardened structure at higher quenchant temperatures than those conventionally used refer to 4. When specifying parts with small quantity requirements, standard alloys should be specified or engineering drawings should allow optional materials. Cary Metal Finishing H. An oxyfuel burner is used for flame hardening.
At the time of publication, the editions were valid.
ANSI-AGMA 2004-B89-1995 Gear Materials and Heat Treatment Manual
Material selection is an integral part of the design process. Good machinability if annealed, or normalized and tempered to approximately HB or quenched and tempered to approximately HB. Successful induction hardening of either gray 0204-b89 ductile cast iron is dependent on the amount of carbon in the matrix.
The nitride process is restricted by and specified by case depth, surface hardness, core hardness and material selection constraints. Forging stock is 2004b-89 fully killed steel to minimize the occurrence of fissures due to dissolved gases during the forging process. Castings generally being isotropic nondirectionality of propertieswhen sound in the rim tooth section, can provide comparable mechanical properties to those of forgings.
They achieve mechanical properties through alloying without heat treatment. All other 0204-b89 measurements should be converted before specifying a case depth. Specified finish operations after hardening depend upon accuracy and contact requirements for all applications. This has generally been replaced by ductile iron. The actual part must be examined for complete coverage in all areas specified to be shot peened.
The case depth is determined by a microhardness tester and measured normal to the tooth surface at 0. Castings should be furnished free of sand, scale, extraneous appendages, and hard areas resulting from arcairing, gas agms, and repair welding which could adversely affect machining.
For added copper alloy information, also see SAE J This method produces a rough dimensioned piece by mechanical deformation between an upper and lower die hammer and anvil in an open frame press or hammer.
Both of these methods of surface hardening can be qgma by spin hardening, or by tooth to tooth hardening. High induced stress can result in quench cracking. Weld repair in the tooth portion may require notification of the purchaser. 200-b89
Smaller sections can be processed in well agitated oil. The white layer thickness is also dependent upon the analysis of steel.
Spin flame hardening involves more manual setup factors, which include positioning of the flame, gas flows, etc. Ideal critical diameter is the diameter which, when quenched in an infinite quench severity such as ice brinewill result in a microstructure consisting of 50 percent martensite of the center of the bar. For more consistent results, it is recommended that coarser pitched gears of leaner alloy steels receive a quench and temper pretreatment; for example, 20044-b89 with teeth coarser than 3 DP.