(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.
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Conversations with multiple gear designers and failure analysts indicate that these predicted values are consistent with real-world experiences with heavily loaded gears. Modern electric arc furnace EAF and vacuum refining VR atma technologies have enabled steelmakers to improve steel oxide inclusion cleanness to levels that rival vacuum arc re-melted VAR steels at a fraction of the cost. Your Alert Profile lists the documents that will be monitored.
A representative test coupon sized for determining the core hardness and microstructure can also be used for determining the case properties or as a process control test coupon.
This standard 923-b005 also available to be included in Standards Subscriptions. Cold treatment should not be used to transform large amounts of retained austenite e.
It is recognized that the effective case depth of carburize and hardened gear teeth varies with location on the gear tooth. No ferrite total decarburization is permissible in the case microstructure of the gear tooth. Characteristics covered include raw material, heat treatment and post heat treat processing, and 923-b055 associated inspections. A cold working process performed by bombarding the surface of a part with small spherical media. Stereographic methods are employed to generate volumetric inclusion population density, and linear elastic fracture mechanics are employed to illustrate critical flaw size for initiation and growth of a fatigue crack in application.
At the time of initial development, the editions shown were valid. Each zgma these histograms compares five different steel producers.
The reduced variate is calculated as follows:. Acceptable if does not exceed: Any person who refers to any AGMA technical publication should be sure that the publication is the latest available from the Association on the subject matter. Please first verify your email before subscribing to alerts.
The operator loads a carousel of 12 samples into the SEM and starts the automated analysis process.
Adsorption of carbon processes involve a subsequent quenching to harden, while adsorption of nitrogen does not require quenching to harden.
This microstructure zone should be free of blocky ferrite, pearlite, and measurable bainite. Teeth 6 in mm 8 in mm 6 in mm Controlling section: The method of correlation should be documented. Method 2 — Combustion The combustion method utilizes chips from a machining cut of 0. The bending strength of gear teeth related to their resistance to gear tooth bending failure. Type Fine Thick A sulfide 3. Cold treatment is also known as sub–zero treatment or deep freezing.
When high-energy electrons from the electron beam strike the sample, some of the inner-shell electrons contained in the elements of the sample may be excited to a higher-energy shell, leaving an electron hole in the inner shell. Process control test coupons may be used to determine surface carbon concentration, carbon penetration, carbon gradients, nitride depth, white layer thickness, intergranular oxidation depth, and process repeatability.
Gear Design Relevant Cleanness Metrics | Gear Solutions Magazine Your Resource to the Gear Industry
Direct-hardening unalloyed and low-alloyed wrought steel in form xgma different black products ISO A representative test coupon may contain a tooth form that will be used to verify the heat treat process. The distance from the finished tooth surface to a specific sub–surface hardness value. Subscription pricing is determined by: 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. Reduction of hard- Not specified.
This is especially true with rapid short 923-b5 cycles. The property of a ferrous alloy that determines the depth and distribution of hardness induced by quenching. Characteristics covered include raw material, heat treatment and post heat treat processing, and their associated inspections.
Early in the running of this gear, the bending stresses, combined with the 923–b05, were large enough to result in a stress intensity that exceeded the threshold, Kth, hence allowing a fatigue crack to initiate at the inclusion. Predominantly 5 or finer. However, this method does not provide inclusion metrics that are relevant to gear design, and it cannot provide the statistically robust data needed to predict gear performance.
Due to the state aga the art of alternate microhardness testing methods, results may vary by the equivalent — ISOby comparison to micrographic diagrams, Method B, Plate II with 0. Effort was made 923-0b5 reference ISO specifications where possible.
The outer portion that has been made harder than the inner portion see core hardness as a result of altered composition, microstructure, or both, by treatments such as carburize and hardening, induction 9923-b05, flame hardening, and nitriding.
The Ultrapremium practice for its strand cast process path is under development. The removal of oxygen from molten steel by addition of suitable elements, such as silicon and aluminum which react with oxygen, primarily forming discard slag.
Also used as alternate terminology for a test coupon used for hardness and microstructure testing. The sensitivity for the flat bottom hole method shall utilize standard test blocks per ASTM E with the reflector size as specified in tables 1 through 4 of this information sheet. Bending failure is a fatigue phenomenon usually resulting in cracking at the tooth root fillet.