Abstract
The paper describes a new method for the non-destructive measurement of the mechanical hardness of ferromagnetic components, based on the relationship between a “coefficient of magnetic hardness” and the variables in the upper portion of the magnetization curve. It is shown that there is a direct relationship between the magnetic permeability and the mechanical hardness of a low-alloy-content steel, and this is used as the basis of a d.c. magnetic method of hardness measurement for two steel components of diverse character. The construction and performance of portable apparatus for the testing of armour-piercing shot and crank-end bushes is described in detail, and the test results obtained are discussed. The reproducibility of readings is better than 1%, almost linear correlation between instrument reading and mechanical hardness is obtained, and the sensitivity is of a reasonable order. The simplicity of operation is such that unskilled personnel may be employed for routine testing.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Proceedings of the IEE - Part II: Power Engineering
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
