(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):||9 November 2008|
|PDF File Size:||1.72 Mb|
|ePub File Size:||18.68 Mb|
|Price:||Free* [*Free Regsitration Required]|
Similarly, volumetric inclusion populations can be used to populate loading models, in combination with Monte Carlo simulation, to sgma relative fatigue life between different populations. Special stock additional allowances, such as those used to minimize distortion during heat treatment, must be considered. Adsorption of carbon processes involve a subsequent quenching to harden, while adsorption of nitrogen does not require quenching to harden.
With induction or flame hardening there is no significant alteration of the chemical composition of the surface layer. Mean-free path can quickly be used to consider the likelihood of an inclusion being present in a component and is valid for both globular oxides and stringers.
Microstructure of case along Primarily fine Primarily fine acicular tempered Primarily fine acicular tempered flank for pitting resistance acicular marten- martensite. Neither carbonitrided nor nitrocarburized gearing is covered by this document. Monday, December 31, 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.
Modern electric arc furnace EAF and vacuum refining VR steelmaking 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. Rejection of piece parts shall only 923-b0 based on case hardness.
Acceptance criteria is not specified but is to be agreed upon. 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. The use of lime or fluorspar, or both, in the steelmaking slag is acceptable.
For D type globular oxides, the worst 0.
Reduction of Not specified. Table 2 shows the maximum likely globular oxide inclusions for each of the steels reviewed previously. Grade 1 Not specified. Reduction of hard- Not specified. Predominantly 5 or finer. A steel containing specified quantities of alloying elements other than carbon and the commonly accepted amounts of manganese, copper, silicon, sulfur, and phosphorus added to increase hardenability and ayma affect changes in mechanical properties.
AGMA B05 – Metallurgical Specifications for Steel Gearing
This standard is not included in any packages. Standards Subsctiption may be the perfect solution. Grade 3 Test report only. Carbide precipitation in the Continuous carbide case. Cast gears Not permitted.
Gear Design Relevant Cleanness Metrics
Murakami proposes that a 30, mm 2 be used, which equates to a reduced variate value of 5. The process control test coupon microstructure may be correlated to the condition of the finished gear. Murakami and co-workers  used stress analysis to evaluate a broad range of defect shapes and sizes, under a range of loading conditions.
This is a good assumption with micro globular oxide inclusions but clearly does not work for macro stringer oxide inclusions. At intermediate stress intensity levels, the crack growth is log-log linear, and at higher stress intensities, the critical stress intensity is reached, and rapid fracture occurs.
See figures 11, 12 and 13 for examples of visual estimates of retained austenite 92-b05 constituent in tempered martensite. A sample used for tensile or impact strength testing. Figure 14 Type A contour xgma only shall be specified. Z-contrast facilitates the automated identification of oxide particles in a steel matrix as a result of the significant difference between the atomic number of iron, with an atomic number of 26, and oxygen, with an atomic number of 8.
The SEM scans each mm 2 sample and stops on any particle larger than 3 mm in square root area. The tooth area includes only those portions of the gearing material where the teeth will be located to a depth below the finished tooth tips of at least 1.
The property of a ferrous alloy that determines the depth and distribution of hardness induced by quenching. Characterization of the inclusion population for a heat of steel requires tens of hours of SEM run time, but only tens of minutes of sample preparation agja operator time.