GB207876A - Method of and means for testing the hardness of metals and other materials - Google Patents

Method of and means for testing the hardness of metals and other materials

Info

Publication number
GB207876A
GB207876A GB2420022A GB2420022A GB207876A GB 207876 A GB207876 A GB 207876A GB 2420022 A GB2420022 A GB 2420022A GB 2420022 A GB2420022 A GB 2420022A GB 207876 A GB207876 A GB 207876A
Authority
GB
United Kingdom
Prior art keywords
hardness
test
pendulum
time
measuring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2420022A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB2420022A priority Critical patent/GB207876A/en
Publication of GB207876A publication Critical patent/GB207876A/en
Expired legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/40—Investigating hardness or rebound hardness
    • G01N3/50—Investigating hardness or rebound hardness by measuring rolling friction, e.g. by rocking pendulum

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)

Abstract

207,876. Herbert, E. G. Sept. 7, 1922. Testing hardness of materials.-A method of measuring the relative hardness of materials comprises rolling a weighted test-member upon the surface of the material to be tested and measuring the time or amplitude of the swing. Apparatus for carrying out the method comprises a compound pendulum h, which is initially balanced in three planes by screws b', b<2>, b<3>, and swings about a hardened ball a the centre of curvatures of which is the centre of suspension of the pendulum. The tilt of the pendulum is indicated by an inclinometer f of the spirit level type. The centre of gravity of the instrument can be shifted by means of a movable mass b<4> screwed on a lixed shaft. Two independent hardness tests are made :- (a) Time test for measuring the indentation hardness (b) Scale test for measuring the resistance to working with a tool. The ratio of the results of (b) and (a) is said to measure the " flow hardness " of the material. In testing, the pendulum is placed upon the specimen c and oscillated; the amplitude of the first oscillation as shown by the spirit level is measured for the scale test and the time of oscillation is taken for the time test. The results, of the time test by the instrument are convertible into Brinell numbers and extend upwards into regions of hardness where the .Brinell test is not applicable. For specimens of nearly the same hardness the pendulum is rendered unstable by adjustment of the mass b<4> and the hardness compared by means of the time test.
GB2420022A 1922-09-07 1922-09-07 Method of and means for testing the hardness of metals and other materials Expired GB207876A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2420022A GB207876A (en) 1922-09-07 1922-09-07 Method of and means for testing the hardness of metals and other materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2420022A GB207876A (en) 1922-09-07 1922-09-07 Method of and means for testing the hardness of metals and other materials

Publications (1)

Publication Number Publication Date
GB207876A true GB207876A (en) 1923-12-07

Family

ID=10207954

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2420022A Expired GB207876A (en) 1922-09-07 1922-09-07 Method of and means for testing the hardness of metals and other materials

Country Status (1)

Country Link
GB (1) GB207876A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107255589A (en) * 2017-06-16 2017-10-17 爱佩仪中测（成都）精密仪器有限公司 The plane adjustment mechanism for being easy to workpiece hardness to detect

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107255589A (en) * 2017-06-16 2017-10-17 爱佩仪中测（成都）精密仪器有限公司 The plane adjustment mechanism for being easy to workpiece hardness to detect

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