کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
830617 1470357 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Quenching microstructure and properties of 300M ultra-high strength steel electron beam welded joints
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
پیش نمایش صفحه اول مقاله
Quenching microstructure and properties of 300M ultra-high strength steel electron beam welded joints
چکیده انگلیسی

The 300M steel was welded by electron beam welding (EBW) with optimized welding parameters in the annealed state. As-welded, for comparison, and as-quenched (oil quenching at 870 °C × 1 h and tempering at 315 °C × 2 h) welded joints were investigated in this paper. The microstructure and fracture morphology were analyzed using scanning electron microscopy (SEM) and optical microscope. X-ray energy spectrum analysis was used to determine chemical composition of phases formed at the joint. The microhardness and tensile strength were evaluated. Results indicate that the weld metal microstructures of the as-welded joint are lower bainite, retained austenite and pro-eutectoid ferrite; the heat affected zone microstructure is sorbite with undissolved particles. The microstructure of as-quenched joint is tempered martensite. The tensile strength of the joints after quenching reached 1900 MPa.


► Electron beam welding is applied in 300M steel.
► The welded joint tensile strength can reach 1900 MPa and 97% of base metal strength.
► The microstructures of 300M steel welded joints are tempered martensite.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials & Design - Volume 40, September 2012, Pages 386–391
نویسندگان
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