The mechanical environment is described in the paper and then the environments in three different orbits are proposed, called leo ( low earth orbits ), meo ( medium earth orbit ) and geo ( geosynchronous earth orbits ). the influence produced by the atomic oxygen, micrometeorites and debris, ionizing radiation and cold welding under vacuum is presented in the paper. some principles are proposed, which can be as the method to choose materials of the mechanism in space environment
空間環境中力學環境對可動結構的影響直接關繫到機構的設計問題,所以本文第四章中嶽建如:中文摘要浙江大學博士學位論文20024首先詳細論述了空間環境中的力學環境,然後給出了空間環境的三種軌道環境劃分,及每一種環境影響因素對空間可動結構設計的影響,包括原子
氧、離子射線、溫度、微隕石和碎片以及真空冷
焊現象等環境因素,提出了材料選擇的原則,為可動結構材料選擇提供了一定的依據。
The results show that the slag series has strong capabilities of deoxidization, denitrification and dehydrogenation and is able to protect welds and obtain high quality welds
試驗結果表明,其渣系具有很強的脫
氧、脫氮和脫氫能力,對
焊道能起到很好的保護作用,可獲得高質量的
焊縫。
A kind of stainless steel flux - cored wire has been successfully developed, based on acid slag type system, by adding a bit of oxides and trace of deoxidizer, adjusting the fluidity of melting slag to increase shielding of the back weld
在酸性渣系的基礎上,通過添加少量
氧化物,調整熔渣的流動性,並加入微量的強脫
氧劑,以增強背面
焊縫的保護,研製成功一種背面不充氬的不銹鋼打底單面
焊雙面成形專用藥芯
焊絲。
The welding conditions should always be neutral or slightly oxidizing.
焊接氣氛必須永遠保持中性或微
氧化。
Repair of the oxyacetylene welding of the crank anxle
曲軸的
氧乙炔焰噴
焊修復
Oxyacetylene welding and heating blowpipes. nozzles and nozzles adaptors. range of normal flowrates and dimensions
氧炔
焊和加熱炬.
焊嘴和
焊嘴夾頭.標稱流量的范圍和尺寸
Methods for chemical analysis of melted welding fluxes. the flame photometric method for determination of sodium oxide and potassium oxide content
熔煉
焊劑化學分析方法.火焰光度法測定
氧化鈉,
氧化鉀量
Brazing alloys will not flow over or bond to oxides
銅
焊合金不能流經或粘結在
氧化物上。
The steel models the grill to use the high quality pe raw material and the high quality carbon spring steel wire and increases high quality anti - purifications and so on ultraviolet ray medicinal preparation and antioxidant becomes, the anti - break force is high, the welding is reliable, break elongation ratio low ( 3 % )
鋼塑格柵採用優質pe原料及優質碳素彈簧鋼線並添加優質抗紫外線劑及抗
氧劑等精製而成,抗斷裂強力高,
焊接牢固,斷裂延伸率低( 3 % ) 。
Dried flux is liable to flake off, exposing metal surfaces to oxidation
乾燥的
焊劑會脫落,是暴露的金屬表面被
氧化。
If fluxed parts are allowed to stand, the water in the flux will evaporate, and dried flux is liable to flake off, exposing metal surfaces to oxidation
如果允許塗上
焊劑的部件處于直立狀態,那麼
焊劑中的水分會蒸發掉,而乾燥的
焊劑很容易脫落,致使暴露的金屬表面容易被
氧化。
Oxygen / fuel torch sets, propane torches, electric welders, portable disk or wheel grinders, portable lead pots and tar buckets are some examples of such tools and equipment
氧氣/燃料
焊槍、丙烷氣割炬、電
焊工、手提圓盤或車輪磨工、手提鉛罐和瀝青桶都是類似的工具和裝備的例子。
Argon welder, oxygen welder, co2 welder, electric welder, allumen composite sole welder and ultrasonic plastic welder total : 14 sets braze, iron welding stainless steel welding, plastic welding, welding of composite sole of stainless steel aluminum, direct welding, roll welding, spot welding
氬弧
焊機
氧氣
焊機二
氧化碳
焊機電
焊機鋁合金復合底
焊機超聲波塑料
焊機共計14臺銅
焊鐵
焊不銹鋼
焊塑料
焊不銹鋼鋁復底
焊直
焊滾
焊點
焊
The technological capabilities of electronic solders were presented through analysis the action of solders in the soldering process, which includes temperature of melting or solidifying, anti - oxidation capability, wetability and overflow capability
摘要通過分析
焊料在釬
焊過程中的行為,提出了電子
焊料的工藝性能主要包括熔化固化溫度、抗
氧化性、潤濕性和漫流性。
A method of multi - metal - layer alternate growing is applied to develop a new type of solder structure, which prevents oxidation and creeping of the solder ( the research of this field has been published in an english journal )
採用多層金屬交替生長的方法,研製出一種新型的
焊料結構,防止了
焊料的
氧化和上爬(已在國外刊物發表) 。
Contains of oxygen cylinder, acetylene cylinder, oxygen regulator, acetylene regulator, flashback arresters, high pressure flexible houses, cutting and welding kits, safety and protective equipment necessary
包括
氧氣、乙炔瓶,
氧氣、乙炔減壓表,回火器,高壓軟管,
焊槍,割刀以及其他設備。
Skills required : gas cutting and welding, pipe repair, lift machine operation, machine tool operation, water treatment and purification systems, waste water systems treatment
具備以下技能:氣割和
氧焊、電
焊、管道維修、起重設備的操作、機械工具的應用、水處理和污水處理等。
Acetylene - welding installation
乙炔氧焊裝置