Rockwelln.²

Brit.

/ˈrɒkw(ɛ)l/, U.S.

/ˈrɑkˌwɛl/

Origin: From proper names. Etymon: proper name Rockwell.

Etymology: < the names of Hugh M. Rockwell (1890–1957) and Stanley P. Rockwell (1886–1940), U.S. metallurgists, who invented the testing apparatus ( H. M. Rockwell and S. P. Rockwell U.S. Patent 1,294,171 (1919); S. P. Rockwell U.S. Patent 1,516,207 (1924)).

Engineering.

attributive. Designating a hardness test in which the depth of penetration of a solid (usually a metal) by a steel ball or a diamond cone is measured under specified conditions; designating equipment for performing this test. Also: expressing hardness as determined by such a test.

ΘΚΠ

the world > matter > constitution of matter > hardness > [noun] > measurement or instruments for determining

sclerometer1879

Scleroscope1907

Shore Scleroscope1908

Brinell1915

hardometer1919

Rockwell1920

indenter1929

1920 Foundry Trade Jrnl. 22 778/2 A new hardness testing apparatus, called the Rockwell hardness tester, is now available.

1922 Chem. Abstr. 16 3296 Formulas..are given for conversion from the Rockwell value to the Brinell value.

1930 Engineering 19 Sept. 358/1 Rockwell hardness measurements and X-ray diffraction patterns had shown that lattice distortion could be accompanied by appreciable softening.

1976 Islander (Victoria, Brit. Columbia) 16 May 15/3 Steel less than Rockwell 57–59 is too soft and won't hold a cutting edge.

1991 Soldier of Fortune Dec. 10/1 The blade is..professionally heat treated (sub-zero quench) and triple-tempered. Final Rockwell-hardness is an even 58 Rc.

2007 APT Bull. 38 38/1 The hardness tests were conducted with a Rockwell hardness tester.

This entry has been updated (OED Third Edition, June 2010; most recently modified version published online March 2022).

单词	rockwell
释义	Rockwelln.² Brit. /ˈrɒkw(ɛ)l/, U.S. /ˈrɑkˌwɛl/ Origin: From proper names. Etymon: proper name Rockwell. Etymology: < the names of Hugh M. Rockwell (1890–1957) and Stanley P. Rockwell (1886–1940), U.S. metallurgists, who invented the testing apparatus ( H. M. Rockwell and S. P. Rockwell U.S. Patent 1,294,171 (1919); S. P. Rockwell U.S. Patent 1,516,207 (1924)). Engineering. attributive. Designating a hardness test in which the depth of penetration of a solid (usually a metal) by a steel ball or a diamond cone is measured under specified conditions; designating equipment for performing this test. Also: expressing hardness as determined by such a test. ΘΚΠ the world > matter > constitution of matter > hardness > [noun] > measurement or instruments for determining sclerometer1879 Scleroscope1907 Shore Scleroscope1908 Brinell1915 hardometer1919 Rockwell1920 indenter1929 1920 Foundry Trade Jrnl. 22 778/2 A new hardness testing apparatus, called the Rockwell hardness tester, is now available. 1922 Chem. Abstr. 16 3296 Formulas..are given for conversion from the Rockwell value to the Brinell value. 1930 Engineering 19 Sept. 358/1 Rockwell hardness measurements and X-ray diffraction patterns had shown that lattice distortion could be accompanied by appreciable softening. 1976 Islander (Victoria, Brit. Columbia) 16 May 15/3 Steel less than Rockwell 57–59 is too soft and won't hold a cutting edge. 1991 Soldier of Fortune Dec. 10/1 The blade is..professionally heat treated (sub-zero quench) and triple-tempered. Final Rockwell-hardness is an even 58 Rc. 2007 APT Bull. 38 38/1 The hardness tests were conducted with a Rockwell hardness tester. This entry has been updated (OED Third Edition, June 2010; most recently modified version published online March 2022). < n.²1920
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Rockwelln.2

Rockwelln.²