PENGARUH PENGGUNAAN PARAMETER LAS PADA LAS BUSUR LISTRIK TERHADAP TINGKAT KEKERASAN DAERAH PENGARUH PANAS (HEAT AFFECTED ZONE - HAZ)

Abstract

Memgelas aria].a h menyambuny dub, hue h logarn pada titik iebur yang area de n9an logam pony , 11: arnbu nga n Las ngat f 1 e bel ; rri kornpa k. Moto 1..,.1.,s-an pada par a [net er yang li C11.1 rrer4ra VI dkia parr root 11 t k den las . Ji LT+ .1 1 as man jadi Path:, prAer Jean manual par aroparameter ini tar ya ntu WA Pada PC n,ga.1 n ftetar Jr dc,ncinn care elor.4.-JF...1- i.m.c;,n di labor ator par ,..71rnnt..er las ffIld -sari saliva - z, n k >keya.s& k same , veca ra teor et is da err ah penpar psnas mere rnpu nyai kc ker sn ter endah di banding deers h ya rig lain. Pada p n-rit,lan ini parameter-parameter yang t..rp11i.h adalah ;,...,aramet.o- la;,: yanl hark, tolok o kur nya ada li-, her (.....=2,-Dr1,(8n peng amat.a n i , L I 1 mata n S i Herr X; an film 3r in; kr!-, Logan) 11,1 , n dam uji ti,,Gangan to Hari par a. mei tr-psr.+rneter Y Y a II cl dipun.rkan unt.uk mengela kite11p 1 Al ne.1 ka k 6:, I n 1; heat 1ed zone. Welding is the joini.nen two metal on the same melting point 1. la these joints are flexible; light and compact. Thu quality of welded joint depend on the parameters used, two important parameter are oloctric current and travelling speed. If both are suitable the quality of welded is good. In manual work these Parameters depend on experience of welder, but it can found by experiments in the laboratory. With weldinq parameters the hardnesb number of welded begin base metal to welded are not the same, theoretically heat affected zone has lower hardness number then the other zones. On t.hi s research these parameters selected are heat parameter, indicatj of these are based on visualinvestigation; X ray film invest ig,ut ion ; r01 ": r OstruCtUre Ysib; hardnebb tebt and tewalle test. From the parameters used for welding we get the hardness number of heat affected zone.