Title:
【発明の名称】焼入硬化層深さの非破壊測定方法
Document Type and Number:
Japanese Patent JP3087499
Kind Code:
B2
Abstract:
PURPOSE:To provide a non-destructive measuring method of the depth of a quench-hardened layer whose part to be measured can easily and quickly be measured by this method without cutting off the part and by which method the depth of the quench-hardened layer can surely be detected. CONSTITUTION:A test piece 1 is inserted into a first induction coil 3 and a first inducible coil 4 concentrically arranged to the induction coil 3. In the condition of inserting a master piece 2 into a second induction coil 5 and a second inducible coil 6 concentrically arranged to the induction coil 5, in the case of impressing induction voltage to the first and the second induction coils 3, 5, a phase difference theta between a synthetic vector of inducible voltage vectors generated in the first and the second inducible coils 4, 6 and an induction voltage vector is measured. From the pre-obtd. relation between the phase difference thetaand the depth of the quench-hardened layer, the depth of the quench-hardened layer of the test piece 1 is obtd.
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Inventors:
Tachibana
Masayuki Shimizu
Masayuki Shimizu
Application Number:
JP5749093A
Publication Date:
September 11, 2000
Filing Date:
March 17, 1993
Export Citation:
Assignee:
Nissan Motor Co., Ltd
International Classes:
C21D1/10; C21D1/55; G01N27/72; (IPC1-7): C21D1/10; C21D1/55; G01N27/72
Domestic Patent References:
| JP62263481A | ||||
| JP3273157A | ||||
| JP59170217A | ||||
| JP48723B2 | ||||
| JP5756164Y2 |
Attorney, Agent or Firm:
Yutaka Koshio