Optimized Welding For Producing Defect Free Thick Sections Welds

Optimized Welding For Producing Defect Free Thick Sections Welds Between Alloy 617 And Stainless Steel 304 H Cu

Abstract: The invention relates to a welding procedure with optimized welding parameters to produce defect-free dissimilar metal weld joints of thick sections of Alloy 617 (ASME 2439) and stainless steel 304H Cu(ASME 2328-1) for Advanced Ultra Super Critical Power Plants comprising the steps of an edge preparation of the joinable plates; selecting the run-on and run-off plates made of stainless steel; selecting alloy 617 filler material for welding; using Argon as back purging gas; adapting conventional Gas Tungsten Arc Welding with parameters such as root pass and hot pass using 1.6 mm dia filler wire and remaining passes using 2.4 mm dia filler wire; without clamping arrangement for root pass and hot pass while during remaining passes, plates are clamped to restrict/minimize distortion; maintaining the inter-pass temperature maintained <150oC except for hot and root pass; cleaning by wire brush between passes to remove oxide debris, and using a pre-bend angle of 2o. { FIGURE 5 }

Patent Information

Application #

Filing Date

27 November 2014

Publication Number

35/2016

Publication Type

INA

Invention Field

ELECTRICAL

Status

Email

lsdavar@ca12.vsnl.net.in

Parent Application

Patent Number

Legal Status

Grant Date

2022-02-25

Renewal Date

Applicants

BHARAT HEAVY ELECTRICALS LIMITED

with one of its Regional Offices at REGIONAL OPERATIONS DIVISION (ROD), PLOT NO : 9/1, DJBLOCK 3rd FLOOR, KARUNAMOYEE, SALT LAKE CITY, KOLKATA – 700091, having its Registered Office at BHEL HOUSE, SIRI FORT, NEW DELHI – 110049, INDIA

Inventors

1. R RAVIBHARATH

Welding Research Institute, Bharat Heavy Electricals Limited, Tiruchirappalli 620 014, Tamil Nadu

2. PAVAN ALAPARTI HANU VENKATESH

Metallugy Department (MTL) Coporate Research & Development Division, Bharat Heavy Electricals Limited, Vikasnagar, Hyderabad 500 093, India

Specification

CLIAMS:please find the attachment ,TagSPECI:please find the attachment

Documents

Application Documents

#	Name	Date
1	GPA.pdf	2014-12-02
2	FOA.pdf	2014-12-02
3	F3.pdf	2014-12-02
4	F2.pdf	2014-12-02
5	DRWNGS.pdf	2014-12-02
6	1246-KOL-2014-FORM-18.pdf	2015-03-25
7	1246-KOL-2014-FER.pdf	2018-12-07
8	1246-KOL-2014-OTHERS [20-05-2019(online)].pdf	2019-05-20
9	1246-KOL-2014-FORM-26 [20-05-2019(online)].pdf	2019-05-20
10	1246-KOL-2014-FORM 3 [20-05-2019(online)].pdf	2019-05-20
11	1246-KOL-2014-FER_SER_REPLY [20-05-2019(online)].pdf	2019-05-20
12	1246-KOL-2014-ENDORSEMENT BY INVENTORS [20-05-2019(online)].pdf	2019-05-20
13	1246-KOL-2014-DRAWING [20-05-2019(online)].pdf	2019-05-20
14	1246-KOL-2014-CLAIMS [20-05-2019(online)].pdf	2019-05-20
15	1246-KOL-2014-US(14)-HearingNotice-(HearingDate-05-01-2022).pdf	2021-11-25
16	1246-KOL-2014-FORM-26 [03-01-2022(online)].pdf	2022-01-03
17	1246-KOL-2014-Correspondence to notify the Controller [03-01-2022(online)].pdf	2022-01-03
18	1246-KOL-2014-Written submissions and relevant documents [19-01-2022(online)].pdf	2022-01-19
19	1246-KOL-2014-FORM 3 [19-01-2022(online)].pdf	2022-01-19
20	1246-KOL-2014-ENDORSEMENT BY INVENTORS [19-01-2022(online)].pdf	2022-01-19
21	1246-KOL-2014-PatentCertificate25-02-2022.pdf	2022-02-25
22	1246-KOL-2014-IntimationOfGrant25-02-2022.pdf	2022-02-25
23	1246-KOL-2014-RELEVANT DOCUMENTS [28-09-2023(online)].pdf	2023-09-28

Search Strategy

1	1246kol2014_03-04-2018.pdf