Study on Weldability of Q1300E Ultra High Strength Steel
Gas shielded welding is applied to Q1300E steel plate which is independently developed by Xingcheng Special Steel,and welding process is studied.The optical metallographic microscope,tensile tester,impact tester,ben-ding tester,hardness tester and etc.,are used to analyze the welding joints of Q1300E steel plate.The results show that the microstructure at the weld seam of Q1300E steel plate welding joint is mainly composed of bainite and acicular fer-rite,and the microstructure of base material is composed of tempered sorbite.When the preheating temperature more than or equal to 100 ℃,the welding crack disappears.With the increasing of heat input,the strength of the welding joint shows a downward trend,while the bending performance at the welding joints is deteriorated significantly.
Ultra high strength steelQ1300EWeldHeat-affected zone
NETL
NSTL
万方数据
