Title:
JOINT STRUCTURE AND MANUFACTURING METHOD OF JOINT STRUCTURE
Document Type and Number:
Japanese Patent JP2017209725
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a joint structure having a satisfactory joint strength without providing restriction to a steel plate component and welding workability and to provide a manufacturing method of the joint structure.SOLUTION: A joint structure 100 includes: a first member 11 made of high tension steel; a second member 13 which is superimposed on the first member 11 and is made of high tension steel; an insertion member 15 made of steel which is retained in such a state as to be inserted toward a superimposition surface from an opposite surface of the superimposition surface between the first member 11 and the second member 13, of the second member 13; and a welded part 19 formed by melting the insertion member 15 formed at an insertion tip of the insertion member 15 and the first member 11. A carbon equivalent Ceq(N1) of the insertion member is set to be lower than a carbon equivalent Ceq(M2) of the second member. Therein, carbon equivalent Ceq is defined by the following relation: Ceq=C+Si/30+Mn/20+2P+4S (C, Si, Mn, P, S represent content (mass%) of each element and, when such elements are not contained, the content is set as 0).SELECTED DRAWING: Figure 1
Inventors:
MAEDA KYOHEI
IWASE SATORU
IWASE SATORU
Application Number:
JP2017074691A
Publication Date:
November 30, 2017
Filing Date:
April 04, 2017
Export Citation:
Assignee:
KOBE STEEL LTD
International Classes:
B23K11/16; B23K11/11
Domestic Patent References:
| JP2008173666A | 2008-07-31 | |||
| JPS5617145A | 1981-02-18 | |||
| JP2014000580A | 2014-01-09 | |||
| JP2007521964A | 2007-08-09 |
Foreign References:
| US20150144602A1 | 2015-05-28 | |||
| WO2015117059A1 | 2015-08-06 | |||
| US20130309520A1 | 2013-11-21 |
Attorney, Agent or Firm:
Patent business corporation glory patent office