Publication: Boru üretiminde kullanılan çeliklerinin mag kaynak parametrelerinin mikroyapı ve mekanik özellikleri üzerindeki tesirleri
Abstract
BORU ÜRETİMİNDE KULLANILAN ÇELİKLERİNİN MAG KAYNAK PARAMETRELERİNİN MİKROYAPI VE MEKANİK ÖZELLİKLERİ ÜZERİNDEKİ TESİRLERİ Endüstride yaygın olarak kullanılan MAG (Metal Aktif Gaz) gaz altı kaynak yönteminde kaynak parametrelerinden kaynak ilerleme hızı, tel hızı ve akım şiddetinin dikiş geometrisine etkileri incelenmiştir. Az alaşımlı çeliğe SG2 teli ve % 100 CO2 gazı kullanılarak levha üzerine farklı akım, tel ilerleme hızı ve kaynak ilerleme hızı parametreleri seçilerek uygulanmıştır. Uygulamalar sonucunda elde edilen kaynak dikişinin; dikiş genişliği, taşan dikiş yüksekliği, nüfusiyet derinliği, temas yüzey açısı, iç dikiş formu, dış dikiş formu, taşan dikiş kesit alanı, nüfuz eden dikiş kesit alanı, toplam alan ve %’ de karışım oranı değerleri ölçülerek bu parametrelerdeki değişimlerinin dikiş geometrisine etkileri incelendi. Şu sonuçlar elde edildi. 1.Kaynak nüfusiyet derinliği ve kaynak kesit alanı kaynak akımı ile doğru orantılıdır. 2.Kaynak nüfusiyet derinliği ve kaynak kesit alanı kaynak ilerleme hızı ile ters orantılıdır.
THE EFFECTS OF MAG WELDING PARAMETERS ON THE MICROSTRUCTURE AND MECHANICAL PROPPERTIES OF PIPE STEELS Gas metal arc welding (MAG) process is very important in iudustrial welding operations. The welding parameters affect the quality and productivity of the weldments. Horizontal bead-on-plate welds were made on 14 mm thick ST52 steel plates by MAG gas metal arc method. The welding current, welding speed and wire feed rate varied in the welding operations. All other welding parameters were kept constant. The welde were cut to obtain transverse sections. Each specimen was polished and etched with 2 % nital. Photographs were taken from the specimens. The weld width, weld penetration, depth reinforcement area and weld metal area was measured on each photograph to find the effects of varying parameters. The following results were obtained from the experiments: 1.The weld penetration depth and weld metal area was directly proportional with the welding current. 2.The weld penetration depth and weld metal area was indirectly proportional with the welding speed.
THE EFFECTS OF MAG WELDING PARAMETERS ON THE MICROSTRUCTURE AND MECHANICAL PROPPERTIES OF PIPE STEELS Gas metal arc welding (MAG) process is very important in iudustrial welding operations. The welding parameters affect the quality and productivity of the weldments. Horizontal bead-on-plate welds were made on 14 mm thick ST52 steel plates by MAG gas metal arc method. The welding current, welding speed and wire feed rate varied in the welding operations. All other welding parameters were kept constant. The welde were cut to obtain transverse sections. Each specimen was polished and etched with 2 % nital. Photographs were taken from the specimens. The weld width, weld penetration, depth reinforcement area and weld metal area was measured on each photograph to find the effects of varying parameters. The following results were obtained from the experiments: 1.The weld penetration depth and weld metal area was directly proportional with the welding current. 2.The weld penetration depth and weld metal area was indirectly proportional with the welding speed.