English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

9% Nickel steel has been widely used for storage of liquefied gases, oxygen, and nitrogen in competition with aluminium and austenitic alloys due to its low cost. The development of 9% nickel steel with low ductile-brittle transition temperatures reformed the LNG industry by extensive storage and transportation. In recent years, the demand for 9% nickel steel fuel tanks increasing due to the International Maritime Organization regulations on the reduction of sulphur oxides from 3.5% to 0.5%. Hence, the LNG fuel tanks made with 9% nickel steel became a major part of the international energy industry. However, the weldability, fabrication cost, and productivity of these steels are one of the major concerns for manufacturers. Flux cored arc welding (FCAW) process is the most commonly used joining method for 9% nickel steel with Hastelloy fillers. In FCAW, the loss of deposited metal due to inter pass cleaning by grinding action caused to a reduction in total productivity. Demands for higher production, low cost, better mechanical properties, and reliability are the main driving forces for new developments in this area. To achieve these, the most recently developed “Super-TIG Welding” with C-type filler was successfully applied to improve the 9% Nickel steel weldability, productivity and, mechanical and metallurgical properties of the butt welds. In SuperTIG welding, alloy 625 filler was used, which is cheaper and good weldability over the Hastelloy fillers. The weldability evaluation tests resulted in improved resistance to hot cracking susceptibility using Super-TIG welding. The mechanical properties of the Super-TIG welded joints performed better than the FCAW joints. Most importantly, the productivity of the welding Rezime Čelik sa 9% nikla se široko koristi za skladištenje utečnjenih gasova, kiseonika i azota u konkurenciji sa aluminijumom i austenitnim čelicima, zbog niske cene. Razvoj čelika sa 9% nikla sa niskim prelaznim temperaturama duktilno-krto, reformisao je TNG industriju obimnim skladištenjem i transportom. Poslednjih godina povećava se potražnja za rezervoarima za gorivo od čelika sa 9% nikla zbog propisa Međunarodne pomorske organizacije o smanjenju sumpornih oksida sa 3,5% na 0,5%. Stoga su rezervoari za TNG gorivo napravljeni od čelika sa 9% niklap ostali glavni deo međunarodne energetske industrije. Međutim, zavarivanje, trošak izrade i produktivnost ovih čelika predstavljaju jednu od glavnih briga proizvođača. Postupak zavarivanja punjenom žicom (FCAW) je najčešće korišćen način spajanja za čelik sa 9% nikla sa Hastelloy dodatnim materijalima. Kod FCAW, gubitak nanetog metala usled međučišćenja postupkom brušenja, uzrokuje smanjenje ukupne produktivnosti. Potražnja za većom proizvodnjom, niskim troškovima, boljim mehaničkim svojstvima i pouzdanošću su glavne pokretačke snage za nova dostignuća u ovoj oblasti. Da bi se ovo postiglo, nedavno razvijeno „Super-TIG zavarivanje“ sa C-tipom dodatnog materijala,uspešno je primenjeno za poboljšanje zavarivanja, produktivnosti i mehaničkih i metalurških karakteristika zavarivanja čelika sa 9% nikla. Pri Super-TIG zavarivanju korišćen je dodatni materijal od legure 625, što je jeftinije i postiće bolje zavarivanje u odnosu na Hastelloy dodatne materijale. Testovi za ocenjivanje zavarivanja rezultirali su poboljšanom otpornošću na vruće prsline pomoću Super-TIG zavarivanja. Mehaničke osobine Super-TIG zavarenih spojeva su bolje od NAUKA∗ISTRAŽIVANJE∗RAZVOJ SCIENCE∗RESEARCH∗DEVELOPMENT 88 ZAVARIVANJE I ZAVARENE KONSTRUKCIJE, 2/2020, str. 87-90 dramatically improved by Super-TIG welding. Super-TIG welding is capable of producing higher feeding rates with clean beads. Therefore, the alloy 625 C-Filler and avoidance of inter pass cleaning in Super-TIG welding resulting in increased productivity. The newly developed Super-TIG welding achieved many things to obtain satisfactory products in the recent welding industry. FCAW spojeva. Ono što je najvažnije, produktivnost zavarivanja dramatično je poboljšana Super-TIG zavarivanjem. Super-TIG zavarivanje može stvoriti veće brzine dodavanja sa čistim zavarima. Stoga legura od 625 C-dodatni materijal i izbegavanje međučišćenja kod Super-TIG zavarivanja rezultuje povećanom produktivnošću. Novorazvijeno Super-TIG zavarivanje postiglo je mnoge stvari kako bi dobilo zadovoljavajuće proizvode u sadašnjoj industriji zavarivanja.

Improvement of hot cracking susceptibility and productivity using Super-TIG welding for 9% Nickel-steel