| 摘要 |
PROBLEM TO BE SOLVED: To provide an electric resistance welded tube for a high strength hollow stabilizer having an excellent balance of strength-toughness, and to provide a method for producing a high strength hollow stabilizer. SOLUTION: The electric resistance welded tube has a composition comprising, by mass, 0.20 to 0.38% C, and Si, Mn and Al in which each content is controlled to the proper one, comprising 0.01 to 1.50% W and 0.0005 to 0.0050% B, and further comprising Ti and N in the ranges of 0.001 to 0.04% Ti and 0.0010 to 0.0100% N also so as to satisfy N/14<Ti/47.9. The electric resistance welded tube having the above composition as the stock is subjected to a forming stage, and a heat treatment stage where the formed stock is subjected to quenching treatment so as to be heated to an Ac<SB>3</SB>transformation point or above and also in such a manner that the temperature T in the part heated to the highest temperature on the whole of the hollow stabilizer satisfies (T/140)-7.84≤log(W) (wherein, W: the content (mass%) of W) and to be rapidly cooled or is further subjected to tempering treatment so as to be heated to≤350°C and to be cooled in order, thus the hollow stabilizer is obtained. COPYRIGHT: (C)2006,JPO&NCIPI
|
