(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.
|Country:||Antigua & Barbuda|
|Published (Last):||9 November 2005|
|PDF File Size:||2.89 Mb|
|ePub File Size:||18.4 Mb|
|Price:||Free* [*Free Regsitration Required]|
The case depth specification should be established to avoid gear failure which might initiate in this zone. Figure 9 illustrates the progression of a gear tooth bending fatigue failure as a result of a globular oxide micro inclusion.
The first is TimkenSteel Ultrapremium air-melted steel. Magnetic particle inspection of Inspection recommended to the Inspection required to the finished gearing 6 11 12 13 following limits: No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without prior written permission of the publisher.
Item Detail – AGMA B05 (reaffirmed April 8, )
The measurement method should be appropriate for the size and configuration of the work pieces. B C D E F is the cross sectional area of the billet prior to upsetting, in2 mm2 ; is the height of the cutoff ingot prior to upsetting, inch mm ; is the height of the upset blank after upsetting before piercing, inch mm ; is the height of the upset blank after piercing, inch mm ; is the wall thickness of the upset blank after piercing, before any bore expansion associated with piercing, inch mm ; is the height of the finish forged or rolled ring, inch mm ; is the wall thickness of the finish forged or rolled ring, inch mm.
This document, as a general rule, does not differentiate based on gearing size. As illustrated in Figure 6a linear regression using the maximum likely linear fit is made of the rank-ordered extreme value data, and the value at which this 923-v05 intersects the Y lim value is the SEV maximum likely inclusion value. Cold treatment should not be used to transform large amounts of retained austenite e.
Induction and flame hardened For Grades 1 and 2 gearing, the effective case depth is measured from the finished surface to a location where the hardness number is equivalent to 10 HRC numbers below the specified minimum surface hardness. The SEM scans each mm 2 sample and stops on any particle agm than 3 mm in square root area. Metallurgical characteristics for carburize and hardened gearing. The process control test coupon microstructure may be correlated to the condition of the finished gear.
The property of a ferrous alloy that determines the depth and distribution of hardness induced by quenching. Commercial grain size is categorized as either coarse grain size or fine grain size 5 or finer. Intermediate values are not classified since the effect of deviations from the quality standards cannot be evaluated easily. Characteristics qgma are typically evaluated at the same time are grouped by having the same number before the decimal point, and modified with different numbers after the decimal point for the individual characteristics evaluated at that time.
Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards. The hardness number reported on a scale different from the scale used for hardness 923-0b5. Heat Treatment of Steel Gears July 15, This zone can have lower hardness and different microstructure than the base material. Falk Corporation Xtek, Inc. 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.
Reduction of sur- Not specified. As noted previously, macro stringer inclusions are typically an order of magnitude less frequent than globular oxides and therefore much less likely to be in a critical area compared to one or more critically sized globular oxides.
A solid solution of one or more elements 923-bb05 face–centered cubic iron. Method 1 — File hardness The flanks of a tooth are file hardness tested per SAE J or ISOannex D with lack of file hardness indicating possible decarburization or non–martensitic structures.
[PDF] AGMA B05 – Free Download PDF
An alternative location is given by ISOtable 4, item 8. The stress intensity at the crack tip is then varied, and the rate of crack growth is measured. The term core hardness is applicable to carburize and hardened gearing. A sample is machined with a notch and subject to an initial fatigue cycle to pre-crack the sample. This sensitivity shall be used when radially scanning the portion of the wrought material that will comprise the tooth area.
Characteristics covered include raw material, heat treatment and post heat treat processing, and their sgma inspections. Should meet the following characteristics: Predominantly 5 or finer. The generic terminology covering carburize and nitride hardening applicable to steel that change the chemical composition and microstructure of the surface layer agmw adsorption of carbon, nitrogen, or a mixture of the two and by diffusion, create a chemical composition gradient.
All requirements for a metallurgical quality grade must be met in order to use the stress value, from the AGMA rating standard, for that grade.
This process is repeated for each stringer inclusion type A, B, C. A measure of the ability of a furnace environment containing active 923–b05 to alter or maintain, 923-b005 prescribed conditions, the carbon content of the steel. Figure 7 shows the calculated mean-free paths for the globular oxide inclusions greater than 10 mm in square root area and stringers wgma than mm in length.
Metallurgical characteristics defined in the tables of this clause are intended to assure the quality of the finished gear teeth. The balance of the document remains unchanged. Figure 3 b shows the raw data in histogram form for macro stringer oxide inclusions lengths per square millimeter. The ing subsequent stock removal, microstructure should be free of undissolved pearlite observable at X and measurable disregarding corner bainite observable at — X.
Any post–heat treat stock removal must be considered. For induction or flame hardened gearing, alternative terminology for effective case depth. An outer-shell, high-energy electron then fills the hole, and the difference in energy is released as a characteristic X-ray. If the coupon is to be used only to determine the case properties, it can be smaller than one used to determine the core properties of the gear tooth.
Microstructure of case along Primarily fine Primarily fine agam tempered Primarily fine acicular tempered flank for pitting resistance acicular marten- martensite. Need more than one copy? An aggregate of ferrite and cementite resulting from the transformation of austenite at temperatures below the pearlite range but above the martensite start temperature.
Forty-eight samples from six locations in the heat are collected from front, middle, and back portions of the heat and top and bottom positions of the ingot. Endurance limit adequate to resist contact fatigue. Please first verify your email before subscribing to alerts.
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.