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		题名	作者	年代	出处	被引量
	1	Effect of copper on mechanical properties of high strength SMAW weld metal显示文摘Mechanical properties of SMAW (shielded metal arc welding) weld metal (yield strength higher than 900 MPa) with systematic additions of copper (up to 1.48wt%) were tested. The microstructure and precipitates in different regions were analyzed by optical microscope and transmission electron microscope. The results indicate that copper improves the low temperature toughness of weld metal when the copper content is low and reaches the peak value 48 J (at -50 ℃) with 0.2wt% copper additions. When the content is high the copper precipitates as ε-Cu phase in the reheat zone of middle beads. These precipitates improve the strength of the weld metal evidently (yield strength up to 975 MPa) without obvious effect on the low temperature toughness. The copper within 1.1wt% content can improve the strength without toughness loss.	薛钢张京海姚润钢	2007	China Welding2007，16，1：	0

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