Analysis of the applicability of high strength steel of YS = 1300 MPa in the marine industry

• Autorzy: Czechowski M. , Mniecznikowska A.

Identyfikatory

DOI

10.5604/12314005.1216436

• Języki publikacji: EN

Abstrakty

EN

The paper shows the results of non-destructive and destructive tests carried out on high strength martensitic steel – Weldox 1300. It is used for the construction of crane lorries, mining equipment and submarines. During testing a test joint of the following dimensions was used: length – 600 mm, width – 300 mm, and thickness – 9.5 mm. Welding was executed using flux-cored wire Union x90. The results obtained in the following tests were analysed: nondestructive tests, tensile and bend test, impact test, hardness test, and macrotexture test. Non-destructive testing: visual, magnetic particle and ultrasonic inspections showed no irregularities. The material met the acceptance requirements. The results of the tensile test of the examined steel amounted to 1047 MPa on average. The samples were broken in the weld. During root bend and tensile test the specimen was bent up to the 180° angle during which no welding discontinuities were observed. During face bend and tensile test, the sample was bent to the angle of approx. 40°– visible cracks. Rupture of the sample in the weld and cracks created when bending are due to the reduced flow stress of the additional material against the tested steel. Energy of the impact test for specimens notched in the weld was 37.9 [J], and for specimens notched in the heat affected zone was 41.5 [J]. The average hardness of the specimen was determined at the level of 317 HV. Macroscopic testing did not show any delamination or welding discontinuations. In addition, strength tests of the base material were carried out. The results were compared with the product certificate provided by the steel manufacturer. The paper presents the results of tests, which can be used during factory production control of high strength steel.

Słowa kluczowe

EN

high strength steel; martensitic steel; welding

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2016
• Tom: Vol. 23, No. 3
• Strony: 79--84
• Opis fizyczny: Bibliogr. 5 poz., rys.

Twórcy

autor

Czechowski M.

• Gdynia Maritime University, Faculty of Marine Engineering Morska Street 81-87, 81-225 Gdynia, Poland tel.:[phone], fax: [phone]

autor

Mniecznikowska A.

• Gdynia Maritime University, Faculty of Marine Engineering Morska Street 81-87, 81-225 Gdynia, Poland tel.:[phone], fax: [phone]

Bibliografia

• [1] Holzner, A., Spawanie wysokowytrzymałych drobnoziarnistych stali konstrukcyjnych metodą MAG drutami proszkowymi, Biuletyn Instytutu Spawalnictwa, No. 4, pp. 57-67, 2011.
• [2] Pilarczyk, J., Poradnik inżyniera, Spawalnictwo, WNT, Warszawa 2003.
• [3] Węglowski, M., Nowoczesne stale ulepszane cieplnie – własności i korzyści z ich zastosowania, Biuletyn Instytutu Spawalnictwa, No. 4, pp. 32-41, 2012.
• [4] PN-EN 15614-1:2008: Specyfikacja i kwalifikowanie technologii spawania metali – Badanie technologii spawania – Cz. I Spawanie łukowe i gazowe stali oraz spawanie łukowe niklu i stopów niklu.
• [5] PN-EN 10045-1:1994: Próba udarności sposobem Charpy’ego. 84

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.