Plug for hot tube-making
View Patent ↗A plug for hot tube-making includes: a plug main body; a build-up layer formed around an axis of the plug main body on a surface of the plug main body; and a sprayed coating formed on a surface of the build-up layer.
1. A plug for hot tube-making, comprising:
a plug main body;
a build-up layer formed on a surface of the plug main body around an axis of the plug main body; and
a sprayed coating formed on a surface of the build-up layer;
wherein the surface of the plug main body includes:
a first surface region in which the build-up layer is to be formed; and
a second surface region provided behind the first surface region in the plug main body, and
wherein the sprayed coating includes:
a first sprayed region formed on the surface of the build-up layer; and
a second sprayed region formed on the second surface region.
2. The plug for hot tube-making according to claim 1 ,
wherein the second sprayed region is adjacent to the first sprayed region.
3. The plug for hot tube-making according to claim 1 ,
wherein the build-up layer coats a front end of the plug main body.
4. The plug for hot tube-making according to claim 1 ,
wherein the sprayed coating is formed by arc-spraying a steel wire rod.
5. The plug for hot tube-making according to claim 1 ,
wherein a thickness of the sprayed coating at a front end location of the plug main body is thicker than a thickness of the sprayed coating at a tapered surface location of the plug main body.