The patented product developed by kedewei company-"with bottom groove structure"cored wire product

　　1.Product features of"with bottom groove"cored wire

　　a.Good compactness.The filled powder is compact to reduce the flow of powder in the lumen.Avoid problems such as empty line and stuck line;

　　b.Excellent mechanical properties.The cored wire has high strength and is not easy to be damaged,so as to avoid wire breakage in use.

　　2、Experimental comparison

　　1）Without bottom groove structure Strength test

　　2）With bottom groove structure Strength test

　　Conclusion:The cored wire with"bottom groove"structure has higher strength and is more conducive to use

　　3、Principle description

　　In the manufacturing process of ordinary circular cored wire without bottom groove,it generally meets the appearance dimension requirements by drawing and reducing the diameter,which will lead to the drawing and thinning of the steel strip outside the cored wire,and the hardening of the metal surface due to plastic deformation.In this way,the strength and toughness of the cored wire body will be reduced,and it will be damaged in case of large external force,which has been proved by practice,In case of long-term turbulence during transportation,this kind of cored wire will produce the flow of alloy powder,resulting in the problem of empty wire of some cored wires.

　　The circular wire with the bottom groove is reduced by the shrinkage of the bottom groove,which ensures that the thickness of the steel strip is basically unchanged and the strength and toughness of the cored wire.If the cored wire is deformed due to large external force,the bottom groove part will also release a certain deformation space to ensure that the cored wire is not broken and powder leakage to the greatest extent.Due to the shape of a triangular structure,This is equivalent to forming a continuous"stiffener"on the side of the cored wire,which is conducive to maintaining higher strength when the cored wire is inserted into the molten steel,and the angle and depth of the cored wire entering the molten steel can be better.Due to the use of with bottom groove,the alloy powder can be filled more tightly,which can effectively avoid the empty line problem caused by bumping during transportation.