AGMA 2004-B89 PDF

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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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Credit lines should read: Any person who refers to an AGMA Technical Publication should be sure that the publication is the latest available from the Association on the subject matter. Topics included are definitions, selection guidelines, heat treatment, quality control, life considerations and a bibliography. The material selection 2004-b98 ferrous, nonferrous and nonmetallic materials.

Aggma, cast, and fabricated gear blanks are considered. The heat treatment section includes data on through hardened, flame hardened, induction hardened, carburized, carbonitrided, and nitrided gears. Quenching, distortion, and shot peening are discussed. Quality control is discussed as related to gear blanks, process control, and metallurgical testing on the final products. It is intended to assist the designer, process engineer, manufacturer and heat treater in the selection and processing of materials for gearing.

Data contained herein represents a consensus from metallurgical representatives of member companies of AGMA. The first draft of AGMA Reprinting of AGMA Work continued on the Standard with numerous additional revised drafts within the Metallurgy and Materials Committee until it was balloted in Suggestions for the improvement of this standard will be welcome. Abney Fairfield Manufacturing R. Berndt C and M of Indiana J.

Burrell Metal Improvement Co. Giammarise General Electric J. Chevrolet Muncie J. Bruce Kelly General Motors D. Milano Regal Beloit Corporation A. Shapiro Arrow Gear W. Shoulders Reliance Electric Deceased M. Starozhitsky Outboard Marine A.

Bergquist Western Gear J. Black General Motors E. Carrigan Emerson Electric P.

ANSI-AGMA 2004-B89-1995 Gear Materials and Heat Treatment Manual

Cary Metal Finishing H. Craig Cummins Engine T. Heller Peerless Winsmith D. Hillman Westinghouse, Air Brake B. Houck Mack Trucks A. Mumford Alten Foundry G. Rickt Auburn Gear H. Smith Invincible Gear Y. Sueyoshi Tsubakimoto Chain M. Tanaka Nippon Gear R. Vaglia Farrel Connecticut T. Grade and Heat Treatment. Flame and Induction Hardening. Incoming Material Quality Control. Incoming Material Hardness Tests.

Incoming Agmq Mechanical Tests. Heat Treat Process Control. Mechanical Property Test Bar Considerations. Machinability of Common Gear Materials. Mechanical Properties of Ductile Iron. Chemical Analyses of Wrought Bronze Alloys. Chemical Analyses of Cast Bronze Alloys. Mechanical Properties of Cast Bronze Alloys. Case Hardenability of Carburizing Steels.


Typical Distortion Characteristics of Carburized Gearing. Shot Peening Intensity Control. Coil Shot Magnetic Particle Inspection.

ANSI/AGMA B89 (R) – Gear Materials and Heat Treatment Manual

Ultrasonic Inspection Oscilloscope Screen. Scope This Manual was developed to provide basic information and recommend sources of additional information pertaining to gear materials, their treatments, and other considerations related to the manufacture and use of gearing.

Metallurgical aspects of gearing as related to rating allowable sac and sat values are not included, but, are covered in AGMA rating standards. References and Information 2. Abbreviations are used in the references to specific documents in this Standard.

The following documents contain provisions which, through reference in this Standard, constitute provisions of this document. At the time of publication, the editions were valid. All publications are subject to revision, and the users of this Standard are encouraged to investigate the possibility of applying the most recent editions of the publications listed.

Design of gears is concerned with the selection of materials and metallurgical processing. This Manual cannot substitute for metallurgical expertise, but is intended to be a basic tool to assist in the selection and metallurgical processing of gear materials.

The material information and metallurgical processes contained herein are based on established data and practices which can be found in the appropriate publications. It is necessary that the designer use a source of metallurgical knowledge of materials and processing. Material specifications are issued by agencies, including the government, large industrial users, and technical societies, some of whom are: Definitions Annealing Full. This treatment forms coarse lamellar pearlite, the best amga for machinability of low and medium carbon steels.

Unless otherwise stated, annealing is assumed to mean full annealing. Spheroidize ahma is a process of heating and cooling steel that produces a globular carbide in a ferritic matrix. This heat treatment results in the best machinability for high 2004-b98 0. Austempering is a heat treat process consisting of quenching a ferrous alloy steel or ductile iron from a temperature above the transformation range in a medium having a rate of cooling sufficiently high to prevent high temperature transformation products, and maintaining the alloy temperature within the bainitic range until desired transformation is obtained.

The bainitic transformation range is below the pearlitic range, but above the martensitic range. Austempering is applied to steels and, more recently in the development stage for ductile iron gearing refer to 4.

Austenite in ferrous alloys agmw a microstructural phase consisting of a solid solution of carbon and alloying elements in facecentered cubic crystal structured iron. The temperature at which ferrous alloys undergo a complete microstructural phase transformation to austenite. Bainite is a microstructural phase resulting from the transformation of austenite, and consists of an aggregate of ferrite and iron carbide.


Its appearance is feathery if formed in the upper portion of the bainite transformation range, and acicular if formed in the lower portion. Generally as carbon is increased, tensile strength and wear resistance increase; however, ductility and weldability decrease.

This results in simultaneous absorption of carbon and nitrogen, which results in the formation of amga nitrides in a high carbon case. Gas carburizing consists of heating and holding low carbon or alloy steel less than 0. Case Depth of Carburized Components.

The case depth for carburized gearing may be defined in several ways including effective case depth, etched case depth, total case depth, and depth to 0.

The carburized case depth referred to in this Manual will be effective case depth. Carburized case depth terms are defined as follows: The effective case depth is the hardened depth to HRC 50 at 0. Etched case depth is determined by etching a sample crosssection with nitric acid, and measuring the depth of the darkened area. Hardness survey is preferred for contral purposes. The total case depth is the depth to which the carbon level of the case has decreased to the carbon level of the base material.

This is approximately 1. Effective case depth is less frequently referred to as the depth to 0. This depth may be measured by analyzing the carbon content or estimating based on microstructure. Atma based on microstructure ignores the hardenability of the base material and is 2004–b89 as accurate a measurement as directly analyzing the carbon level. There is poor correlation between microstructure readings and material strength gradients using this method. This is defined as the depth at which the hardness is 10 HRC points below the minimum specified surface hardness.

Case Depth of Nitrided Components. Nitrided case depth is defined as the depth at which the hardness 200-b89 equivalent to percent of the measured core hardness. The case depth is determined by a microhardness tester and measured normal to the tooth surface at 0.