FIELD: metallurgy.
SUBSTANCE: local heating of workpiece of extruded pipe, rolling of pipe with formation of the end, middle cylindrical part and end with throat is performed. After the end is formed in its middle part at the polar point there drilled is taper hole that is then welded with filling welding wire for formation of full strength tight end and external welded part of tight end is ground by gentle grinding. Gun liner end is full-strength and tight. At that, thickness of the end is not less than two thicknesses of cylindrical part, and external surface of the end has oval shape.
EFFECT: improving reliability of gun liner and increasing its service life.
3 cl, 2 dwg
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