Title:
METHOD FOR PRODUCING PLATED BLACK-HEART MALLEABLE CAST IRON MEMBER, PLATED BLACK-HEART MALLEABLE CAST IRON MEMBER, AND PIPE FITTING
Document Type and Number:
WIPO Patent Application WO/2019/065721
Kind Code:
A1
Abstract:
Provided is a method by which a black-heart malleable cast iron member having a plating layer highly adhesive to a black-heart malleable cast iron member can be produced with less of a burden on the environment compared to conventional methods. This method is a method for producing a plated black-heart malleable cast iron member having a plating layer formed on the surface of a black-heart malleable cast iron member, the method comprising: a step for performing graphitization in a non-oxidizing and decarburizing environment; a step for immersing a graphitized black-heart malleable cast iron in a flux for at least 3.0 minutes; a step for heating the black-heart malleable cast iron removed from the flux to 90°C or higher; and a step for performing hot-dip coating on the heated black-heart malleable cast iron member.
Inventors:
GOTO RYO (JP)
FUKAYA TAKAYUKI (JP)
MATSUI HIROSHI (JP)
SAWADA AKINORI (JP)
FUKAYA TAKAYUKI (JP)
MATSUI HIROSHI (JP)
SAWADA AKINORI (JP)
Application Number:
PCT/JP2018/035656
Publication Date:
April 04, 2019
Filing Date:
September 26, 2018
Export Citation:
Assignee:
HITACHI METALS LTD (JP)
International Classes:
F16L58/08; B22D29/00; C21D5/00; C21D5/14; C23C2/02
Foreign References:
| JP2014019878A | 2014-02-03 | |||
| JPS58151463A | 1983-09-08 | |||
| JPH06316945A | 1994-11-15 | |||
| JPH11152539A | 1999-06-08 |
Attorney, Agent or Firm:
YAMAO, Norihito (JP)
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