| 摘要 |
<p>A process for manufacturing a walking bar member from an elongated tubular metal blank by heating the blank at a temperature of 550 to 1250°C, subjecting the heated blank to plastic working which achieves a working ratio of up to 65% or a flattening ratio of over 1 to not greater than 3,0 to flatten the blank into a tubular body (2) by compression over the entire length thereof, and machining a surface of the tubular body (2) at the side thereof to be brought into contact with a slab to smooth the surface and give a reduced wall thickness, the working ratio and the flattening ratio being represented by (D-H)/D x 100 and W/H, respectively, wherein D is the outside diameter of the blank before the plastic working, H is the minor diameter of the tubular body (2) after the plastic working and W is the major diameter of the tubular body (2) after the plastic working.</p> |
