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BSI BS ISO 14104:2017

Gears. Surface temper etch inspection after grinding, chemical method
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BSI BS ISO 14104:2017

Gears. Surface temper etch inspection after grinding, chemical method

PUBLISH DATE 2017
PAGES 24
BSI BS ISO 14104:2017

This document specifies procedures and requirements for the detection and classification of localized overheating on ground surfaces by chemical etch methods.

The process described in this document is typically used on ground surfaces; however, it is also useful for the detection of surface anomalies that result from post-heat treatment machining such as hard turning, milling and edge breaking (deburring) processes. Surface metallurgical anomalies caused by carburization or decarburization are also readily detectable with this process.

Some methods which have been used in the past are no longer recommended. Specifications are intended to be changed to use the methods in this document. These etching methods are more sensitive to changes in surface hardness than most hardness testing methods.

This document applies to steel parts such as gears, shafts, splines and bearings. It is not applicable to nitrided parts and stainless steels.

NOTE This process, although at times called “nital etch”, is not intended to be confused with other processes also known as “nital etch”.

The surface temper etch procedure is performed after grinding and before additional finishing operations such as superfinishing, shot peening and honing.

SDO BSI: British Standards Institution
Document Number ISO 14104
Publication Date April 25, 2017
Language en - English
Page Count 24
Revision Level
Supercedes
Committee MCE/5
Publish Date Document Id Type View
April 25, 2017 BS ISO 14104:2017 Revision
June 30, 2014 BS ISO 14104:2014 Revision
Sept. 30, 2015 BS ISO 14104:2014 Consolidated