Daim ntawv thov & Specification (Seamless):

Kev kho cua sov ntawm txias kos seamless steel yeeb nkab:

(1) txias drawn steel annealing: yog hais txog cov khoom siv hlau yog rhuab mus rau qhov kub thiab txias, kom tswj tau lub sijhawm, thiab tom qab ntawd maj mam txias cov txheej txheem kho cua sov.Cov txheej txheem annealing feem ntau yog: recrystallization annealing, kev ntxhov siab relieving, pob annealing, tag nrho annealed thiab hais txog.Lub hom phiaj ntawm annealing: feem ntau yog txo cov hardness ntawm cov khoom hlau, txhim kho cov yas, los yog txiav ua rau Liqie siab ua, txo cov residual kev nyuaj siab thiab txhim kho cov uniformity ntawm microstructure thiab muaj pes tsawg leeg, kev kho cua sov, tom qab ua tau los yog cov ntaub so ntswg npaj.

(2) txias kos steel normalizing: hais txog cov cua kub ntawm cov hlau los yog hlau rau Ac3 los yog Acm (qhov kub tseem ceeb ntawm cov hlau) tshaj 30 ~ 50℃, tom qab lub sijhawm tsim nyog kom txias hauv huab cua tseem nyob hauv cov txheej txheem kho cua sov.Lub hom phiaj ntawm normalizing: feem ntau yog los txhim kho cov cuab yeej ntawm cov hlau tsis tshua muaj carbon steel los txhim kho machinability, grain refinement, tshem tawm cov ntaub so ntswg tsis xws luag, npaj rau kev kho cua sov, tom qab npaj cov ntaub so ntswg.

(3) txias drawn steel hardening: yog hais txog cov rhuab hlau Ac3 los yog Ac1 (tsawg dua qhov tseem ceeb ntawm cov hlau) saum toj no ib tug tej yam kub thiab txias rau ib lub sij hawm, ces qhov tsim nyog txias npaum li cas kom tau martensite (los yog shellfish Thaum tshav kub kub kho lub cev) ntaub so ntswg.Cov txheej txheem ntsev da dej quenching muaj zog, martensitic quenching, Austempering, nto hardening thiab ib nrab quenching.Lub hom phiaj quenching: ua kom cov hlau xav tau kom tau txais martensite txhim kho workpiece hardness, lub zog thiab hnav tsis kam, kev kho cua sov, tom qab npaj rau lub koom haum thiab kev npaj.

(4) txias drawn steel tempered: tias tom qab hardened steel, thiab ces rhuab mus rau ib tug kub hauv qab Ac1, tuav ib tug tej lub sij hawm, thiab ces txias rau chav tsev kub, cov txheej txheem kev kho cua sov.Cov txheej txheem tempering yog: tempering, tempering, tempering thiab ntau tempering.Lub hom phiaj ntawm tempering: feem ntau steel tshem tawm kev ntxhov siab uas tsim thaum lub sij hawm quenching, cov hlau muaj siab hardness thiab hnav tsis kam, tab sis kuj muaj qhov yuav tsum tau plasticity thiab toughness.

(5) txias rub hlau quenched: hais txog quenching thiab tempering ntawm steel los yog puas steel txheej txheem kev kho cua sov.Siv nyob rau hauv quenching hais tias steel quenched thiab tempered steel.Nws feem ntau yog hais txog cov qauv carbon ntawm cov hlau thiab hlau alloy.

(6) Kev kho mob txias txias steel: hais txog cov hlau lossis hlau ua haujlwm nyob rau hauv qhov kub thiab txias ntawm cov cua sov nruab nrab, kom ib lossis ob peb lub ntsiab rau hauv nws qhov chaw los hloov nws cov tshuaj muaj pes tsawg leeg, microstructure thiab cov khoom ntawm cov txheej txheem kho cua sov. .Cov txheej txheem kev kho cua sov feem ntau yog: carburizing, nitriding, carbonitriding, aluminized boron nkag.Lub hom phiaj ntawm kev kho tshuaj: Lub ntsiab yog los txhim kho cov hlau nto hardness, hnav tsis kam, corrosion kuj, qaug zog thiab oxidation kuj.

(7) kev kho mob txias txias steel: tias cov hlau yog rhuab mus rau qhov kub siab ib-theem cheeb tsam kom tswj tau qhov kub thiab txias, kom cov theem siab dhau mus rau hauv cov khoom siv tom qab txias txias, thiaj li yuav tau tshaj lub supersaturated. cov txheej txheem kev daws teeb meem kub kho.Lub hom phiaj ntawm kev kho kev daws teeb meem: feem ntau yog los txhim kho cov ductility thiab toughness ntawm steel thiab alloys, los npaj rau kev kho nag lossis daus hardening thiab lwm yam.

Phosphate txheej rau kev kos duab ntawm tubing yog tam sim no tsim nrog qhov hnyav ntawm 4-10

g / m².Qhov no tau txhim kho qhov ua tau zoo ntawm kev kho saum npoo thiab, tib lub sijhawm, zam qhov tsis zoo tshwm sim uas ua rau thawj theem kos duab uas pom muaj coarser-crystalline phosphate txheej.Cov txheej txheej tsim nyog tshaj plaws raws li nitrate / nitrite nrawm zinc hosphate, tsim ntawm 40-75°C. Ntawm qhov kawg ntawm qhov ntsuas kub no, qhov kev xaiv tshwm sim los siv tus kheej-dosing nitrate hom tshuab.Chlorate accelerated zinc phosphate da dej kuj pom.Nyob rau hauv txhua rooj plaub, daim ntawv nyiam ntawm phosphate rau txias daim duab ntawm lub raj thiab seem yog xav tau adherent tab sis softstructured.Nyob rau hauv kev kos duab ntawm welded tubing, lub seam yuav tsum xub muab av.Nyob rau hauv cov ntaub ntawv ntawm me me diametertubing, qhov no yog tsis tau nyob rau hauv lub vuam tshuab.Qee zaum, tej zaum yuav muaj qhov deformation los muab ib qho kev hla ntu.Txij li thaum, raws li txoj cai, tsawg deformations hnyav tuaj yeem zam tau los ntawm welded, tsis zoo li

seamless tubing, kev siv phosphating yog dav, txheej hnyav yog qhov kev txiav txim 1.5 - 5 g / m².Cov no feem ntau yog ua los ntawm zinc phosphate da dej ua haujlwm ntawm 50 thiab 75°C nrog additives siv los txhawb cov txheej txheej thinner.Phosphating kuj yog siv rau tubing ntawm un-alloyed lossis low-alloyed steel nrog chromium cov ntsiab lus txog li 4-6%. hlau kev sib cuag ntawm cov hlab thiab tuag.Yog li, kev puas tsuaj rau cov vuam txias, ua rau grooving lossis tawg tsim, txo qis, cov cuab yeej thiab tuag lub neej txuas ntxiv thiab siv cov duab kos ntau dua.Zinc phosphate txheej kuj tso cai rau kom txo qis dua ib zaug.

Kev kho deg yog ua los ntawm immersion raws cov kab hauv qab no:

•Alkaline degreasing.

•Dej yaug.

•Pickling nyob rau hauv sulfuric los yog hydrochloric acid.

•Dej yaug.

•Neutralizing ua ntej yaug.

•Phosphating.

•Dej yaug

•Neutralizing yaug.

•Lubrication.

•Qhuav thiab khaws cia.