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 1452 views |
 Technical Discussions | |  S S Ananthan
Consultant,
RAA Tech Solutions, India, Joined Jun 2000,  36  | |  07:16 Dec-23-2000
case hardening depth measurement Hello, Can some one tell me how to measure the case hardening depth in carbon steel in a rack and pinion. The thickness of case is 2-4-3.2 mm. Required to measure within +/- 0.1 mm. I read that eddy current can be used and standard equipments are available. Can some one throw some light on this. Any experience for such application would be most useful. Thanks. S S Ananthan
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| | | |  Godfrey Hands
Engineering,
PRI Nadcap, United Kingdom, Joined Nov 1998, 288  | | 08:32 Dec-23-2000
Re: case hardening depth measurement : Hello,: Can some one tell me how to measure the case hardening depth in carbon steel in a rack and pinion. The thickness of case is 2-4-3.2 mm. Required to measure within +/- 0.1 mm. I read that eddy current can be used and standard equipments are available. Can some one throw some light on this. Any experience for such application would be most useful. : Thanks. : S S Ananthan Hello,
Yes, Eddy Current techniques are the conventional Non-Destructive Test (NDT) method for "measuring" case depths in hardened gears.
I say "measured" in inverted commas because there is really no way that case depth can be measured.
Eddy Current techjniques detect parts that are different to acceptable production. My company specialises in NDT techniques for manufactured components, and Eddy Current technique is one of our two main methods.
Case depth determination on gears is a standard eddy current application, with several automatic and semi-automatic machines in production facilities world-wide. We will be pleased to discuss your application with you. Please contact me directly at the above address. Please see our web site also, at www.hands-ndt.co.uk With my best regards, Godfrey Hands
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| | | | Hadi Elhami
| Hadi Elhami
| 08:17 Mar-07-2001
Re: case hardening depth measurement : Hello,: Can some one tell me how to measure the case hardening depth in carbon steel for replacing 1040 steel with 4041 or 4043 in hardness? : Thanks. : H Elhami
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| | | |  S.V.Swamy
Engineering, - Material Testing Inspection & Quality Control
Retired from Nuclear Fuel Complex , India, Joined Feb 2001, 785 |
S.V.Swamy
Engineering, - Material Testing Inspection & Quality Control
Retired from Nuclear Fuel Complex ,
India,
Joined Feb 2001
785
| 01:54 Mar-08-2001
Re: case hardening depth measurement The case hardening depth is usually measured by microstructure study of the cross-section or by a chemical analysis at different depths. Both these tests are destructive. Eddy Current test can be standardised with the help of the above and can be used as a NDT method for production testing, with occassional corss-checks of coupons - Swamy
: : Hello,
.
: : Can some one tell me how to measure the case hardening depth in carbon steel for replacing 1040 steel with 4041 or 4043 in hardness?
.
: : Thanks.
.
: : H Elhami
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