GB249446A - Penetrators for testing penetration hardness - Google Patents
Penetrators for testing penetration hardnessInfo
- Publication number
- GB249446A GB249446A GB3089325A GB3089325A GB249446A GB 249446 A GB249446 A GB 249446A GB 3089325 A GB3089325 A GB 3089325A GB 3089325 A GB3089325 A GB 3089325A GB 249446 A GB249446 A GB 249446A
- Authority
- GB
- United Kingdom
- Prior art keywords
- hardness
- testing
- penetrators
- penetrator
- radius
- 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
Links
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
- G01N3/42—Investigating hardness or rebound hardness by performing impressions under a steady load by indentors, e.g. sphere, pyramid
- G01N3/44—Investigating hardness or rebound hardness by performing impressions under a steady load by indentors, e.g. sphere, pyramid the indentors being put under a minor load and a subsequent major load, i.e. Rockwell system
Landscapes
- 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)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
249,446. Wilson, C. H. Dec. 7, 1925. Testing hardness of materials.-A penetrator for testing the hardness of materials by the indentation method has a convexly curved penetrating tip 5 and a frustoconical penetrating part 6 which merges into the spherical tip. The angle of the core is preferably 120‹; the radius of the spherical segment is between 0.20 and 0.23 millimeters, and the depth of the segment is less than half the radius. The penetrator is preferably a diamond, and is mounted on a holder 2 as by cement. In use, a minor load is first applied, causing the spherical tip to enter the material. A major load is then applied causing the conical part to penetrate. The hardness is deduced from the differences in depth of the impressions produced by the minor and major loads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3089325A GB249446A (en) | 1925-12-07 | 1925-12-07 | Penetrators for testing penetration hardness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3089325A GB249446A (en) | 1925-12-07 | 1925-12-07 | Penetrators for testing penetration hardness |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB249446A true GB249446A (en) | 1926-03-25 |
Family
ID=10314755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3089325A Expired GB249446A (en) | 1925-12-07 | 1925-12-07 | Penetrators for testing penetration hardness |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB249446A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9939529B2 (en) | 2012-08-27 | 2018-04-10 | Aktiebolaget Electrolux | Robot positioning system |
-
1925
- 1925-12-07 GB GB3089325A patent/GB249446A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9939529B2 (en) | 2012-08-27 | 2018-04-10 | Aktiebolaget Electrolux | Robot positioning system |
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