(This Information Sheet is NOT an AGMA Standard). American Gear Metallurgical Specifications for Steel Gearing Manufacturers AGMA B05 CAUTION. (This Information Sheet is NOT an AGMA Standard). American Gear Metallurgical Specifications for Steel Gearing Manufacturers AGMA B05 Association. AGMA B05 Metallurgical Specifications for Steel Gear – Download as Word Doc .doc /.docx), PDF File .pdf) or read online. AGMA B05 Metallurgical.
|Published (Last):||27 July 2017|
|PDF File Size:||13.8 Mb|
|ePub File Size:||8.64 Mb|
|Price:||Free* [*Free Regsitration Required]|
At the time of initial development, the editions shown were valid. Note that cleaner steels will have a larger mean-free path between globular inclusions and stringers. If the particle is in proximity 9223-b05 other particle s such that they meet the standard criterion for stringers, then the group is categorized and assessed as a stringer inclusion.
Type Fine Thick A sulfide 2. Because each element has a unique atomic structure, each element has a unique set of peaks on its X-ray emission spectrum. For procedures associated with process control test coupons, see 4. Machine Repairs June 17, Magnetic particle inspection of Inspection recommended to the Inspection required to the finished gearing 6 11 12 13 following limits: The properties of a process control coupon may be correlated by experience to the properties of the finished gearing with regard to hardness and case depth.
The consolidated tables were submitted to the gear rating committees for their agreement and are published here for 293-b05 by other 923b05. For large gearing where this reduction ratio is not physically obtainable, lesser reduction ratios may be used down to a minimum of 3 to 1.
These limits allow gear designers and producers to select material suppliers that will meet the minimum expectations for material fatigue performance, but do not provide the data needed by designers to meet ever-increasing demands for high power density gearing applications faced today. Maximum allowable depth in root inch mm 0. Any post–heat treat stock removal must be considered. These characteristics should be compatible, wherever possible, with ISO Grade 3 Discontinuous carbides per figure 3 are not acceptable, but dispersed carbides per figure 4 are acceptable.
A microstructural phase which is a compound of metal M and carbon C having the chemical formula of MxCy.
The process control test coupon microstructure may be correlated to the condition of the finished gear. The case depth specification should be established to avoid gear failure which might initiate in this zone. The thickness of a plate equivalent in cooling rate to that of a round bar equivalent controlling section size is 0.
The forming of austenite by heating a ferrous material into the transformation range partial austenitizing or above the transformation range complete austenitizing.
Gear Design Relevant Cleanness Metrics
A segregated structure consisting of alternating, nearly parallel bands of different chemical composition, typically aligned in the direction of primary hot working. Note that this is the same definition used in ISO The agms of retained austenite is a function of carbon content, alloy content especially nickel and manganesequench temperature and subsequent thermal or mechanical treatments.
Characterization of the inclusion population for a heat of steel requires tens of hours of SEM run time, but only tens gama minutes of sample 923-b5 and operator time. The reduction ratio is calculated by the following equation: Table 1 – Metallurgical characteristics for through hardened gearing Item Characteristic1 2 1 Material chemistry 2 3 4 Grain size Hardenability Grade 1 Not specified verified.
The microstructure should be free of blocky ferrite, pearlite, and measurable bainite. The generic terminology covering carburize and nitride hardening applicable to steel that change the chemical composition and microstructure of the surface layer by adsorption of carbon, nitrogen, or a mixture of the two and by diffusion, create a chemical composition gradient.
Cast gears Not permitted. Subscription pricing is determined by: Shot peening of the flanks of gear teeth should be reviewed to ensure that no detrimental effects are caused to the gear set. In order to provide a more direct linkage between gear design and steel cleanness effects on gear fatigue performance, some 293-b05 analytical processes can be performed on these automated SEM image analysis data.
When ultrasonic inspection is specified, the following guidelines shall apply: Quantity must be a positive whole number. Next, a measure of the accumulated inspected area for each of the rank ordered samples, described as the reduced variate, Y, is calculated at each j value.
A representative test coupon should have the same heat treat condition prior to carburizing as the part s represented. A minimum hardenability which is appropriate for part size and quench severity should be specified. From this work, they determined that the stress intensity was related to the square root area of the defect in the plane normal to the principal stress, and they developed a stress intensity equation as a function of the square root area of an inclusion as follows:.
This is especially true with rapid short heating cycles. Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards.
[PDF] AGMA B05 – Free Download PDF
The metastable austenite retained within 923b05 quenched microstructure. A published document for use in converting from one hardness testing scale to another. Log into your account.
The microstructure at the center of the minimum size representative test coupon approximates the core microstructure of the tooth section. Heat treating low alloy PM steels October 15, A series of multipliers is generated based on the number of size ranges selected. Monte Carlo simulations were run comparing Ultrapremium to SBQ 1 and SBQ 2 in order to assess the potential for light weighting Figure 12 or increased torque capacity Figure 13 while maintaining fatigue performance.
The gear rating may zgma limited by either pitting resistance or bending strength for the selected metallurgical quality grade 9223-b05 its core hardness requirement. Medium carbon alloy steel. Site Safety October 1, This results in a thin layer of high magnitude residual surface compressive stress and generally improves the bending strength in the roots of gear teeth.
When a solid body is subjected to stress, and there is a crack or a flaw, such as an inclusion, the stress is concentrated in the vicinity of the flaw. Measurement of surface hardness per ASTM E18 is used as a nondestructive method to evaluate the conformity of individual work pieces to the surface hardness requirements.