Gas valve, lub tog raj kheej tu cov kauj ruam dav dav valve carbon steel forging technical condition

Gas valve, lub tog raj kheej tu cov kauj ruam dav dav valve carbon steel forging technical conditions Kev tu cov roj valve thiab steel lub tog raj kheej valve yog ib yam uas yuav tsum tau ua ua ntej kev sib dhos ntawm cov khoom thiab cov khoom ntawm lub valve. Cov txheej txheem no tuaj yeem ua tiav los ntawm ob peb kauj ruam nruj. Yog tias muaj kev tsis saib xyuas hauv cov kauj ruam no, nws yuav ua rau muaj kev phom sij zais cia hauv kev siv yav tom ntej. Kev tu cov roj valve thiab steel lub tog raj kheej valve yog ib yam uas yuav tsum tau ua ua ntej kev sib dhos ntawm cov khoom thiab cov khoom ntawm lub valve. Cov txheej txheem no tuaj yeem ua tiav los ntawm ob peb kauj ruam nruj. Yog tias muaj kev tsis saib xyuas hauv cov kauj ruam no, nws yuav ua rau muaj kev phom sij zais cia hauv kev siv yav tom ntej. Cov txheej txheem ntxuav cov roj li qub thiab lub tog raj kheej Cov kauj ruam tshwj xeeb: 1. Raws li cov txheej txheem ua tiav, qee qhov yuav tsum tau polished yam tsis tau ua cov burrs rau saum npoo Txhua qhov chaw yog degreased 3. Pickling passivation yog nqa tawm tom qab degreasing, thiab tus neeg saib xyuas tsis ua. muaj phosphorus 4 Tom qab pickling passivation, yaug nrog dej ntshiab, tsis muaj tshuaj residue, carbon steel qhov chaw tshem tawm cov kauj ruam no 5 Qhuav qhov chaw ib los ntawm ib tug nrog cov ntaub ntawv uas tsis yog-woven. Tsis txhob tawm ntawm qhov chaw nrog cov ntaub plaub los yog tshuab ziab nrog cov nitrogen huv si 6 So cov khoom ib los ntawm ib qho nrog cov ntaub ntawv tsis-woven los yog cov ntawv lim lim uas muaj cov tshuaj analytical ntshiab cawv kom txog thaum tsis muaj xim qias neeg. Nyeem cov kauj ruam saum toj no, Kuv ntseeg tias koj tau nkag siab, qhov zoo, cov qauv kev nyab xeeb ntawm lub raj mis valve, hauv txhua qhov txuas ua kom zoo, vim tias tsuas yog hauv txoj kev no yog tus neeg siv kev nyab xeeb thiab cov neeg siv khoom lag luam lub luag haujlwm! Kev mob rau cov pa roj carbon steel forgings ntawm dav li qub, flanges, yeeb nkab fittings thiab lwm yam compression carbon steel forgings yuav tsum tau, xeem txoj kev, soj ntsuam cov cai, kev txiav txim yuav tsum, cov cim thiab daim ntawv pov thawj zoo. Lub ingot yuav tsum muaj kev txiav kom txaus los tiv thaiv kev puas tsuaj (xws li shrinkage, cais, folding, thiab lwm yam). Forging yuav tsum xyuas kom meej tag nrho cov deformation ntawm forgings kom tau raws li tus tsim thiab kev cai. Thaum lub sij hawm forging, cov forgings yuav tsum tau ua kom txias maj mam thaum lawv dhau los ntawm theem hloov pauv kub. Tom qab lub forging yog thaum kawg tsim, nws yuav tsum tau txias kom qis dua 500 ℃ ua ntej qhov kev kho cua sov yuav tsum tau nqa tawm. Qhov Scope ntawm Cov Qauv no qhia txog cov kev xav tau, cov qauv kev sim, kev tshuaj xyuas cov cai, kev txiav txim siab, cov cim thiab daim ntawv pov thawj zoo rau kev sib xyaw carbon steel forgings xws li li qub, flanges thiab cov yeeb nkab fittings. Cov txheej txheem no siv rau kev compression carbon steel forgings xws li li qub, flanges thiab cov yeeb nkab fittings (tom qab no hu ua forgings). Non-compression forgings tuaj yeem ua los ntawm kev siv. Normative reference document Cov ntaub ntawv hauv qab no tsim cov ntsiab lus ntawm tus qauv no los ntawm kev siv rau Wood Standard. Txhua qhov kev hloov kho tom ntej (tsis suav nrog errata) lossis kev hloov kho rau cov ntaub ntawv hais txog lub sijhawm ntawm cov lus piav qhia yuav tsis siv rau tus qauv no. Txawm li cas los xij, ob tog rau kev pom zoo raws li Wood Standard raug txhawb kom tshawb xyuas kev siv cov qauv ntawm cov ntaub ntawv no. Rau cov ntaub ntawv tsis raug lees paub, lawv cov qauv siv tau rau tus qauv no. GB 150 steel siab nkoj GB / T 228 Hlau cov ntaub ntawv - Tensile xeem txoj kev nyob rau hauv chav tsev kub (GB / T 228-2000, eqv ISO 6892: 1998) GB / T 229 Hlau Charpy notch impact test method Metallic Brinell hardness tests - Part 1: Kev sim txoj kev (GB / T231.1-2002, eqv ISO 6506-1,1999) GB / T669 huab hwm coj carbon structural steel Qauv txoj haujlwm thiab cov qauv npaj rau cov khoom siv kho tshuab kuaj GB / T2975 Cov Khoom Hlau thiab Hlau (GB / T 2975 -1998, eqv ISO 377: 1997) GB / T 13927 General valve siab kuaj (GB / T 13927-1992.neq ISO 5208: 1982) JB 4725 siab lub nkoj nrog carbon thiab qis alloy steel forgings JB 4730 siab hlab ntsha nondestructive daim ntawv ntsuam xyuas ASTM A / A1055: 2003 Carbon Steel forgings rau Piping Parts yuav tsum General Requirements Cov khoom siv forging xaiv raws li cov kev cai ntawm Table 1, lwm cov ntaub ntawv uas muaj cov khoom sib piv yuav siv tau. Table 1 Cov ntaub ntawv qib forging Lub forging steel yuav tsum yog hlau. Lub ingot yuav tsum muaj kev txiav kom txaus los tiv thaiv kev puas tsuaj (xws li shrinkage, cais, folding, thiab lwm yam). Forging yuav tsum xyuas kom meej tag nrho cov deformation ntawm forgings kom tau raws li tus qauv tsim thiab kev xav tau. Thaum lub sij hawm forging, cov forgings yuav tsum tau ua kom txias maj mam thaum lawv dhau los ntawm theem hloov pauv kub. Tom qab lub forging yog thaum kawg tsim, nws yuav tsum tau txias kom qis dua 500 ℃ ua ntej qhov kev kho cua sov yuav tsum tau nqa tawm. Kev kho cua sov Forgings nrog nominal siab tshaj PN20 thiab flanges tsis muaj chav kawm siab yuav tsum tau kho cua sov. Txoj kev kho cua sov yog annealing, normalizing, los yog normalizing thiab tempering. 25. Kev kho cua sov ntawm A105 steel tuaj yeem xa mus rau qhov tseem ceeb hauv Table 2. Lwm cov ntaub ntawv yuav tsum xa mus rau cov qauv tsim nyog. Table 2 Kev kho cua sov kub Cov tshuaj muaj pes tsawg leeg Cov tshuaj muaj pes tsawg leeg yuav tsum ua raws li cov lus qhia 3. Cov tshuaj muaj pes tsawg leeg ntawm lwm cov ntaub ntawv raws li GB / T 699 cov cai. Table 3 Tshuaj muaj pes tsawg leeg Thaum cov ntsiab lus ntawm cov pa roj carbon monoxide qis dua 0.35%, rau txhua txhua 0.01I carbon cov ntsiab lus txo, 0.06% manganese cov ntsiab lus raug tso cai ntxiv rau 1.05% manganese cov ntsiab lus kom txog thaum nws siab dua 1.35%. Cov ntsiab lus ntawm Cu, Ni, Cr thiab Mo.v cov ntsiab lus yuav tsum tsis pub tshaj 1.0% Cr thiab cov ntsiab lus ntawm Mo yuav tsum tsis pub tshaj 0.32%