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case depth measurement methods

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Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900245
EISBN: 978-1-62708-350-8
... pregrind, polish, wash and rinse, and etch are conducted exactly as described in Chapter 16, “Examination of the Nitrided Case.” Case Depth Evaluation Case depth can be measured by one, or all, of three methods: Total case depth to core hardness Total case depth to core hardness plus 5...
Image
Published: 01 December 1999
to obtain desirable gradients of both hardness and internal stress. Furthermore, the method of measuring the case, as well as the allowable tolerance in case depth, may be a matter of agreement between the customer and the manufacturer. Effective case depth is defined as depth of case with a minimum More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050245
EISBN: 978-1-62708-311-9
... Abstract This chapter discusses the methods and procedures used for inspecting induction-hardened parts. It provides information on hardness and case depth measurements, nondestructive testing and surface analysis, the effect of various hardening errors, and relevant test standards. case...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.htpa.t53310119
EISBN: 978-1-62708-346-1
.... 20 ). The penetration depth, h , is measured and, from this result, the Barcol hardness is calculated: (Eq 8) H Barcol  = 100 - h 0.0076 , h  in  m m Fig. 20 Measuring procedure with the Barcol method. Source: Ref 7 Figure 21 shows a Barcol hardness...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.htpa.t53310167
EISBN: 978-1-62708-346-1
... geometry is pressed into the material to be tested. Force and displacement are measured simultaneously. At the end of the 19th century, Martens presented a device that allows the force of indentation and the depth of indentation (hardness measurement under test force) to be measured simultaneously ( Ref 1...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.htpa.9781627083461
EISBN: 978-1-62708-346-1
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.pht2.t51440283
EISBN: 978-1-62708-262-4
... was then recorded as effective case depth in thousandths of an inch. The referee method for checking effective case depth was by Knoop 500 g microhardness testing to a depth of 50 HRC equivalent. At least one of every ten checks and/or any check of effective case depth not within the specified limits...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.htpa.t53310091
EISBN: 978-1-62708-346-1
... the case hardness depths are calibrated with conventional methods according to the Vickers procedure, are offered with a calibration certificate from DKD, the German calibration service. Fig. 1 Hardness measurement, with the eddy-current procedure, of an induction-hardened camshaft 100 Cr 6...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.htpa.t53310025
EISBN: 978-1-62708-346-1
... in the case of the Vickers hardness measurement than in the case of the Brinell method. Fig. 29 Intersection through a Vickers indentation with range of the elastic deformation at acting test force (test piece approximately 820 HV 10). Source: Ref 1 In the case of steel test pieces of low...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1984
DOI: 10.31399/asm.tb.mpp.t67850410
EISBN: 978-1-62708-260-0
... encountered metallographic problem, although not a stereological measurement per se. The surface conditions in this category include the following: Depth of decarburization Case depth after carburizing, nitriding, cyaniding, etc. Depth of hardening after heat treatment, flame or induction...
Image
Published: 01 December 2000
Fig. 5.7 Step-ground specimen for hardness-traverse method of measuring depth of medium and heavy cases. Arrows indicate location of hardness-indenter impression. More
Image
Published: 01 September 2005
Fig. 10 Step-ground specimen for hardness-traverse method of measuring depth of medium and heavy cases. Arrows indicate location of hardness-indenter impression More
Image
Published: 01 December 2003
Fig. 1 Step-ground specimen for hardness traverse method of measuring depth of medium and heavy cases. Arrows show locations of hardness-indenter impressions. More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130395
EISBN: 978-1-62708-284-6
... sections in the parts have uniform density throughout. Low sectional densities result in through hardening and wide variation in the case depth within the PM part. Various methods of compaction have been developed to produce parts with minimal difference in density. These include: Double-action...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900167
EISBN: 978-1-62708-350-8
... the case and measure the hardness as the “steps” go deeper into the case. This requires a complex grinding method and is somewhat time consuming ( Fig. 1 ). Fig. 1 Step-ground specimen for hardness traverse method of measuring depth of medium and heavy cases. Arrows show locations of hardness...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.htpa.t53310067
EISBN: 978-1-62708-346-1
... tests can be divided into two categories: Methods in which the deformation is measured: After the impact of the indenter, the size of the remaining indentation is determined optically or by means of a depth measurement, such as the Brinell or Rockwell test. Methods in which the energy...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130417
EISBN: 978-1-62708-284-6
... dimensional deviations, that is, minimum workpiece distortion. Currently, measurement of individual workpiece dimension is a very practical, uncomplicated, and reliable method of product quality assessment. Through the appropriate selection of the grinding wheel and grinding conditions and taking into account...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250163
EISBN: 978-1-62708-345-4
... industry, two terms are frequently used to determine the quality of a carburized case—total case depth and effective case depth. Thus, an accurate and repeatable method for measuring these case depths on a gear tooth is essential not only to control the reliability of carburizing process but also...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900111
EISBN: 978-1-62708-350-8
... of nascent nitrogen into the steel surface is the same for fluidized-bed nitriding as it is for ammonia gas nitriding. The floor-to-floor time is quicker for fluidized-bed nitriding due to the faster initial recovery time ( Fig. 7 ). Figure 8 shows typical processing times for nitride case depths. Fig...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220143
EISBN: 978-1-62708-341-6
... heating include the following: A device or method for measuring workpiece temperature. This often consists of an instrument to be given a direct indication of surface or subsurface temperature (e.g., a thermocouple or radiation pyrometer). It can also consist of some indirect measurement that can...