The age hardening characteristic of as - cast cu20ni20mn and cu20ni35mn alloys and the interface characteristic between the alloy and cast tungsten carbide were studied, and on the basis of this study, composites of cu - ni - mn alloy reinforced with different volume fraction ( 0 - 45vol. % ) and different size ( 42 - 362 m ) of cast tungsten carbide particles were made by vacuum hot - pressing liquid sintering technology. pin on disk two body abrasion tests have been performed with different size of sic abrasive under different loads
本文研究了鑄態cu20ni20mn和cu20ni35mn合
金的時效硬化特性及其與鑄造碳化鎢的界面特性,並在此
基礎上以不同尺寸( 42 362 m )的鑄造碳化鎢顆粒為增強體,採用真空熱壓液相燒結技術制備了不同顆粒含量( 0 45vol . )的鑄造碳化鎢顆粒增強cu - ni - mn合
金基復合材料;以不同粒度的sic為磨料,在不同載荷條件下利用銷?盤磨損試驗機測試了復合材料的二體磨料磨損性能。
Since 1990, canon and dalian city have jointly held the " canon cup ", an annual japanese lecture competition. in may 1998, at the centennial ceremony of peking university, canon donated 5 million yen to for founding a canon scholarship fund. besides being a leading sponsor of the 1990 asian games in beijing and the 1993 east asian games in shanghai, canon has also started to sponsor china baseball league games from 2003
這包括自1990年起,佳能開始與大連市聯合舉辦"佳能杯"日語比賽; 1998年5月,佳能于北京大學建校百年之機,捐資500萬日元設立了"北京大學佳能獎學
金基金" ;佳能還正式贊助1990年北京亞運會和1993年上海東亞運動會,並於2003年開始贊助中國棒球聯賽。
Mladjan dinkic, serbia ' s finance minister, adds that it would be a “ catastrophe ” if serbia were the only country in the region left out of the eu
塞爾維亞的財政部長姆蘭德揚?
金基奇也表示如果塞爾維亞成為該地區唯一一個不參與歐盟進程的國家,這對該國將是一場「災難」 。
The results show that the composites were more wear resistant than the matrix, contributing to the " volume effect " and " size effect ", the wear resistance increases with the particle content and size. the composite shows better wear resistance than high chromium cast iron material especially in low load and fine abrasive test condition. the results also indicate that the composite strengthened by ageing treatment was more wear resistant than as - cast composite
磨損試驗結果表明,鑄造碳化鎢顆粒增強cu - ni - mn合
金基復合材料具有比較高的抗磨料磨損能力,而且其耐磨性隨著鑄造碳化鎢顆粒體積分數及尺寸的增大而提高,表現出了強烈的「體積效應」及「尺寸效應」 ,尤其是在低載荷、細磨料磨損條件下,復合材料表現出更好的而寸磨性,即使與高鉻鑄鐵( cr28 )相比也有很大程度的提高。
Aerospace series - gold base alloy au - b40001 - filler metal for brazing - wire
航空航天系列.
金基合
金au - b40001 .釬焊用填充
金屬.焊絲
Auni18. aerospace series - gold base alloy au - b40001 auni18 - filler metal for brazing - powder or paste
航空航天系列.
金基合
金au - b40001
Aerospace series - gold base alloy au - b4000 - filler metal for brazing - rolled foil
航空航天系列.
金基合
金au - b4000 .硬釬焊用填充
金屬.軋制箔
Aerospace series - gold base alloy au - b40001 - filler metal for brazing - rolled foil
航空航天系列.
金基合
金au - b40001 .釬焊用填充
金屬.軋制箔
Aerospace series - gold base alloy au - b40001 - filler metal for brazing, wire ; german version en 3962 : 2001
航空航天系列.
金基合
金au - b40001 .銅焊填充
金屬:線材
Aerospace series - gold base alloy au - b40001 - filler metal for brazing, rolled foil ; german version en 3961 : 2001
航空航天系列.
金基合
金au - b40001 .銅焊填充
金屬:軋制
Diamond - like carbon gradient film on ti6a14v alloy substrate have been prepared by means of plasma source ion implanted - ion beam enhanced deposition ( psii - ibed ). for potential applications as artificial joint materials and artificial cardiac valve materials, its trobological performance and hemocompatibility has also been evaluated in the present ph. d. thesis
本研究採用等離子源離子注入?離子束增強沉積技術( psii - ibed )制備了鈦合
金基類
金剛石梯度薄膜材料,對類
金剛石梯度薄膜這一新型人工關節材料和人工心臟瓣膜材料的生物摩擦學性能和血液相容性進行了研究和評價,研究了摩擦磨損對材料血液相容性的影響。
Practice of management of metallic mine construction
冶
金基建礦山施工管理的實踐
The minimum first division prize money is hk $ 5 million
每期頭獎獎金基金的最低限額為港幣五百萬元。