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Register a new userدراسة تأثیر رطوبة البودرة (Flux) على عملیة اللحام بالقوس المغمور
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استھدف البحث دراسة تأثیر رطوبة البودرة على عملیة اللحام بالقوس المغمور. یسعى بحثنا للتركیز على العیوب الناتجة عن رطوبة البودرة و معرفة الحدود المسموحة للرطوبة خلال عملیات اللحام.
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References used
Welding, Brazing and Soldering WAS Published in 1993 AS Volume 6 of the ASM HandBOOK. The Volume was prepared under the Direction of the ASM HandBook committee
submerged Arc Welding – ESAB – XA00109620- 2008
ITW Welding – Miller – HOBART – Submerged Arc Welding Consumables
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Oil and gas buried pipeline are usually protected by a thick organic coating and supported by a cathodic protection system. The protection process allows the pipe line protection against corrosion; however, corrosion is taken place in the cracks and
holes of insulation coating due to pipelines adjacency to electromagnetic fields. The process is called AC corrosion affected by some parameters such as AC induced amplitude, cathodic current protection and soil type. This corrosion was theoretically and practically studied by using carbon steel pieces. In addition, a solution stimulating the soil where the pipelines are buried was used. This phenomenon was studied through several experiments. Corrosion compounds were also analyzed. The results revealed a significant effect of AC induced amplitude and soil resistance. It has been also shown that 50 Hz frequency can be very quick in comparison with corrosion occurrence time at each positive or negative AC current phase.
The experiment carried out to improve the efficiency of drip
irrigation system , based on soil moisture. The indirect measure of
humidity Was used in the experiment, connected with the pointing
device (separator continued), and a control device pr
ogrammed on a
low humidity degree, which is degree the field capacity of the soil and
which value is 25%, and on a high moisture degree which is saturation degree
at 75%..
Powder metallurgy method was used during this study to manufactor magnetic
specimens of the two alloys: FeNi65% and FeNi78%. These specimens were treated by
heat with or without the presence of of magnetic field. The mangetic properties was
amusem
ent by using special measurement circle. Crystalline structures were studied
using XRD.
In this research, a study of the influence of arc welding
parameters on the thermal cycle was conducted, where the thermal
cycle within the welded plate of stainless steel 304L by plasma arc
welding (PAW) with weld-on-plate was measured using
the
rmocouples for several welding parameters (intensity of the
welding current, welding velocity, flow rate of plasma gas) and
comparing the influence of this parameters on the thermal cycle
within the plate.
يهدف البحث إلى دراسة قابلية اللحام للصلب المقاوم للصدأ المــزدوج نوع (S31803-2205-SAF) ، و مقارنته بسلوك الصلب الاوستينايتي(304 AISI-S30400) عند اللحام أولاً بطريقة لحام القوس الكهربائي لقطب التنكستن باستعمال الغاز الواقي(TIG) اليدوية بتسليط حرارات د
اخلة تتراوح ما بين (110-450) جول/ملم دون استخدام حشوات لحام.
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