Claims
- 1. A method of joining metal pieces wherein:a rear end of a preceding metal piece and a front end of a succeeding metal piece are heated and the metal pieces are pressed against each other for joining before hot finishing rolling: a temperature T (° C.) in a rear end of the preceding metal piece and the front end of a succeeding metal piece is adjusted to be within a range defined by the following expression. TS≦T≦(TS+TL)/2, where TS: solidus line temperature of the metal piece (° C.) TL: liquidus line temperature of the metal piece (° C.).
- 2. A method of joining metal pieces wherein:a rear end of a preceding metal piece and a front end of a succeeding metal piece are heated and the metal pieces are pressed against each other for joining before hot finishing rolling: a temperature T (° C.) in a rear end of the front end of a preceding metal piece and the succeeding metal piece is adjusted to be within a range defined by the following expression. if Tc≦TS, (Tc+TS)/2≦T≦(TS+TL)/2, and if Tc>TSTS≦T≦(TS+TL)/2 where TS: solidus line temperature of the metal piece (° C.)TL: liquidus line temperature of the metal piece (° C.) Tc: melt temperature of an iron oxide scale (° C.).
Priority Claims (4)
Number |
Date |
Country |
Kind |
5-316751 |
Dec 1993 |
JP |
|
5-328733 |
Dec 1993 |
JP |
|
6-135740 |
Jun 1994 |
JP |
|
PCT/JP94/02113 |
Dec 1994 |
WO |
|
Parent Case Info
This is a divisional of application U.S. Ser. No. 08/513,789 filed on Dec. 29, 1995 under 35 USC §371, U.S. Pat No. 5,951,903.
US Referenced Citations (5)
Foreign Referenced Citations (2)
Number |
Date |
Country |
0 495 989 |
Jul 1992 |
EP |
5-138143 |
Dec 1993 |
JP |