Nature, Količina 91Sir Norman Lockyer Macmillan Journals Limited, 1913 |
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Zadetki 1–3 od 67
Stran 45
... steel metallurgy it is neces- sary briefly to consider what is known of the past history of steel , more particularly with reference to cutting implements , whether for the purposes of peace or war . That steel ( or , to be more ...
... steel metallurgy it is neces- sary briefly to consider what is known of the past history of steel , more particularly with reference to cutting implements , whether for the purposes of peace or war . That steel ( or , to be more ...
Stran 46
... steel resulting from its cementa- tion - carburisation were described . The blister bar was then made into what for perhaps two hundred and fifty years has been known as " shear steel . " ( The method of producing from blister bar ...
... steel resulting from its cementa- tion - carburisation were described . The blister bar was then made into what for perhaps two hundred and fifty years has been known as " shear steel . " ( The method of producing from blister bar ...
Stran 48
... steel , in which the thermal stability of the fortified hardenite was raised to about 700 ° C. , and the striking difference in chemical composition between Mushet's and high- speed steels was shown ; nevertheless , the latter are ...
... steel , in which the thermal stability of the fortified hardenite was raised to about 700 ° C. , and the striking difference in chemical composition between Mushet's and high- speed steels was shown ; nevertheless , the latter are ...
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