Title:
COVERED ELECTRODE FOR CAST IRON AND ITS DEPOSITED PART
Document Type and Number:
Japanese Patent JP3214689
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To make the development of a welding rod with a high impact value at the deposited part of the cast iron material which is related to the wire use development of the cost iron material.
SOLUTION: A condition maintaining Sharpy impact value 5kgm/cm2 of a deposited metal whose base material is the cost iron material, which has been welded with the covered electrode of a wire rod containing at least 40 to 60% Ni except 2.0% C, 2.5% Si and 2.5% Mn, is that the depositedimetal contains 1.20 to 2.20wt.% V. By adding an adequate amount of V from a covering material or the wire rod, a part of the V is solidified in the austenitic phase of a base material, and the strength and the hardness of the deposited metal are enhanced. Further, the grain refining of an austenitic grain size is performed. And, double carbide with VC or FeC3 is formed in the greater part of it, and an outstanding increase in hardness and a remarkable increase in level of the Sharpy impact value as a result of it, are induced. By too small addition of V, the impact value does not reach a target, by an excessive addition of V, high hardness is brought, and the toughness of the deposited metal is lost. Therefore, a range balancing with a target value is limited.
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Inventors:
Isao Mukai
Seiji Yoshioka
Takaaki Hashimoto
Yoshiyuki Hashimoto
Seiji Yoshioka
Takaaki Hashimoto
Yoshiyuki Hashimoto
Application Number:
JP28933996A
Publication Date:
October 02, 2001
Filing Date:
October 11, 1996
Export Citation:
Assignee:
Kurimoto Iron Works Co., Ltd.
Special Welding Rod Co., Ltd.
Special Welding Rod Co., Ltd.
International Classes:
B23K35/30; B23K35/365; C22C19/03; (IPC1-7): B23K35/30; B23K35/365
Domestic Patent References:
| JP5823594A | ||||
| JP3146298A | ||||
| JP5237691A | ||||
| JP83694A | ||||
| JP5726878B2 | ||||
| JP423284B1 |
Attorney, Agent or Firm:
Junzo Aono