Discuz! Board

 找回密码
 立即注册
搜索
热搜: 活动 交友 discuz
查看: 6|回复: 0

2g 5g & 6G Help required

[复制链接]

9万

主题

9万

帖子

29万

积分

论坛元老

Rank: 8Rank: 8

积分
293221
发表于 2021-8-31 23:12:44 | 显示全部楼层 |阅读模式
Gidday :-)My names Lou im from AustraliaNot long finished my Trade as a mature age apprentice and have decided to become a certified welder specialising in Tig/StickMy goal is to  become a pipe welder and develop the skills to pass 6G and 6G restricted weld tests on the spot so i can get onto high paying construction projects etc etc I will start with my 2G  Ive been practicing my 2G for about 5 weeks now n heres what ive been doing:Method: I freehand root and cap & walk the cup for hot and filler passesMaterial practiced on: 3 1/2 inch 6mm Mild steel pipeSetup: Metal cleaned up to shiney 20mm from edge of bevel inside and outside of pipe; Landing approx 2mm, Root Gap 3mm, coupon tacked @ 120 degress in 3 places tacks no bigger than 12mm. Coupon is setup in a pipe fixture and purged with Argon.............No 10 Cup with Gas Lens been using 1.6 tungsten on root and cap 2.4 on the rest eg hot pass and filler runs.................Gasmark 12-14 Settings: Root & hot pass approx 106 amps, Filler passes and Cap approx 110 amps At this stage i am totally nailing my root and hot passes peno is great and am consistently now getting at least 1mm of inside reinforcement Im feeding the 1.6 rod slightly north of the root gap for about 3 seconds then doing a slight back and forth motion with my tungston n seeing a slight keyhole  before my next dab. I buff with a power wire brush between runs but dont touch the cap.Ive been welding the rest out including the hotpass with a 2.4 tungston I walk the cup for the hotpass (the theory is that this will help me warm up for my 5G) and any filler runs then freehand the Cap. My problem is I seem to be doing to many filler runs after my hotpass and Im getting a slight bit of overroll on the cap. By this i mean when you look at my cap the northen part of my bead has less reinforcement than the sourthern part of my beadPassed my 1st Nik break n bend test but want to fine tune my 2GHave just started practicing 5G @ this stage Setup is the same as my 2G will do another post on 5g soonMy teachers at TAFE arnt allowing me to weave or walk the cup on the cap they insist that i freehand Im happy to do this as I want to learn as many techniques as possible........................Any tips or advise muchly appreciated particularly in regards to optimising the apprarence of my capping runs..............Regards LouJust do the best u can with what u have at the time
Reply:GiddayI thought some pictures might help me get a few responses be brutal guys Im here to learn these are my welds after 5 weeks practice..............Am after any hints tips that will improve peno and the appearance of my caps!My present plan is:Feed more wire into the weldpoolWeldout coupon with 2.4 (3/32) electrode and fillerrodBump up my Amps to around 120Start Capping with a Weave rather than stringers Regards Lou Attached ImagesJust do the best u can with what u have at the time
Reply:well I cant help with the freehand stuff I was always allowed to walk the cup, only "fingered" the root. For some reason my instructor was picky on how much the cap stuck out he would tell me that is too flat. But I guess all instructors and QC's for that matter are different. I just finished welding school so I am no expert.
回复

使用道具 举报

您需要登录后才可以回帖 登录 | 立即注册

本版积分规则

Archiver|小黑屋|DiscuzX

GMT+8, 2025-12-28 00:31 , Processed in 0.080007 second(s), 18 queries .

Powered by Discuz! X3.4

Copyright © 2001-2021, Tencent Cloud.

快速回复 返回顶部 返回列表