IT1265986B1 - Durometro a resistenza elettrica per determinare la durezza di materiali metallici - Google Patents
Durometro a resistenza elettrica per determinare la durezza di materiali metalliciInfo
- Publication number
- IT1265986B1 IT1265986B1 IT93VA000018A ITVA930018A IT1265986B1 IT 1265986 B1 IT1265986 B1 IT 1265986B1 IT 93VA000018 A IT93VA000018 A IT 93VA000018A IT VA930018 A ITVA930018 A IT VA930018A IT 1265986 B1 IT1265986 B1 IT 1265986B1
- Authority
- IT
- Italy
- Prior art keywords
- tip
- hardness
- determining
- electric resistance
- metallic materials
- Prior art date
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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0617—Electrical or magnetic indicating, recording or sensing means
- G01N2203/0629—Electrical or magnetic indicating, recording or sensing means using thin films, paintings
Landscapes
- General Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Measuring Leads Or Probes (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
La punta conduttrice di un durometro per metalli, leghe e simili materiali conduttori, comprendente mezzi atti a misurare la resistenza tra la punta ed un pezzo di prova sotto un certo carico applicato al penetratore, è di materiale sostanzialmente isolante avente un film superficiale conduttore, la cui conduttività decresce verso il vertice della punta per contenere l'errore indotto da differenze di temperatura che influenzano la resistività dello strato superficiale conduttore una punta di forgia conica con un angolo non superiore a 110° aumenta la precisione rispetto ai penetratori secondo norma a piramide Vickers o a cono Rockwell 120°.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT93VA000018A IT1265986B1 (it) | 1993-09-10 | 1993-09-10 | Durometro a resistenza elettrica per determinare la durezza di materiali metallici |
JP7508427A JPH08503555A (ja) | 1993-09-10 | 1994-08-30 | 金属性物質用電気抵抗硬度テスター |
EP94927513A EP0668996A1 (en) | 1993-09-10 | 1994-08-30 | Electrical resistance hardness tester for metallic materials |
US08/433,446 US5571954A (en) | 1993-09-10 | 1994-08-30 | Electrical resistance hardness tester for metallic materials |
PCT/EP1994/002867 WO1995007454A1 (en) | 1993-09-10 | 1994-08-30 | Electrical resistance hardness tester for metallic materials |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT93VA000018A IT1265986B1 (it) | 1993-09-10 | 1993-09-10 | Durometro a resistenza elettrica per determinare la durezza di materiali metallici |
Publications (3)
Publication Number | Publication Date |
---|---|
ITVA930018A0 ITVA930018A0 (it) | 1993-09-10 |
ITVA930018A1 ITVA930018A1 (it) | 1995-03-10 |
IT1265986B1 true IT1265986B1 (it) | 1996-12-16 |
Family
ID=11423250
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT93VA000018A IT1265986B1 (it) | 1993-09-10 | 1993-09-10 | Durometro a resistenza elettrica per determinare la durezza di materiali metallici |
Country Status (5)
Country | Link |
---|---|
US (1) | US5571954A (it) |
EP (1) | EP0668996A1 (it) |
JP (1) | JPH08503555A (it) |
IT (1) | IT1265986B1 (it) |
WO (1) | WO1995007454A1 (it) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19720864C2 (de) * | 1997-05-06 | 1999-07-01 | Xuejun Dipl Ing Yin | Verfahren und Vorrichtung zur zerstörungsfreien Bestimmung der Elastizität von Materialien |
US6014900A (en) * | 1998-07-22 | 2000-01-18 | Cts Corporation | Z-axis resistor test system |
DE10003836C2 (de) * | 2000-01-28 | 2002-04-25 | Fraunhofer Ges Forschung | Indentor und Verwendung desselben |
CN101120240B (zh) * | 2004-07-02 | 2010-12-29 | 埃里克·厄恩斯特 | 具有硬质金属或化合物压头和摆动冠的用于在高载荷下测试的硬度测试仪和硬度/深度分布比较评估的方法 |
US20140090480A1 (en) * | 2010-10-22 | 2014-04-03 | Changqing W. Adams | Testing and measuring devices, systems, components and methods |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB289960A (en) * | 1927-02-04 | 1928-05-04 | Robert Esnault Pelterie | Improved method of and apparatus for use in testing the physical properties of materials |
JPS56118374A (en) * | 1980-02-22 | 1981-09-17 | Hitachi Ltd | Semiconductor strain gauge |
DE3169737D1 (en) * | 1980-11-25 | 1985-05-09 | Unisearch Ltd | Hardness tester |
SU1114878A1 (ru) * | 1983-04-06 | 1984-09-23 | Предприятие П/Я А-1891 | Полупроводниковый тензорезистор |
WO1986006833A1 (en) * | 1985-05-03 | 1986-11-20 | Unisearch Limited | Measuring hardness by contact resistance of indenter material |
WO1988003644A1 (en) * | 1986-11-12 | 1988-05-19 | Unisearch Limited | Hardness measuring with a diamond indenter having surface treatment or coating |
JPH0621849B2 (ja) * | 1989-02-13 | 1994-03-23 | 工業技術院長 | 材料試験機用の導電性圧子 |
IT1247645B (it) * | 1990-10-24 | 1994-12-28 | Alfred Ernst | Durometro e metodo di misura della durezza di materiali metallici |
US5313825A (en) * | 1992-05-08 | 1994-05-24 | The United States Of Americas As Represented By The Secretary Of The Army | Dual mass dynamic cone penetrometer |
-
1993
- 1993-09-10 IT IT93VA000018A patent/IT1265986B1/it active IP Right Grant
-
1994
- 1994-08-30 WO PCT/EP1994/002867 patent/WO1995007454A1/en not_active Application Discontinuation
- 1994-08-30 US US08/433,446 patent/US5571954A/en not_active Expired - Fee Related
- 1994-08-30 EP EP94927513A patent/EP0668996A1/en not_active Withdrawn
- 1994-08-30 JP JP7508427A patent/JPH08503555A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
WO1995007454A1 (en) | 1995-03-16 |
ITVA930018A1 (it) | 1995-03-10 |
JPH08503555A (ja) | 1996-04-16 |
ITVA930018A0 (it) | 1993-09-10 |
EP0668996A1 (en) | 1995-08-30 |
US5571954A (en) | 1996-11-05 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
0001 | Granted | ||
TA | Fee payment date (situation as of event date), data collected since 19931001 |
Effective date: 19970820 |