I. Scope ntawm daim ntawv thov
DIN 1629 tus qauv siv tau rau cov uas tsis yog - alloy steel seamless voj voog kav siv nyob rau hauv cov khoom siv tshuaj, nkoj, kav dej, thiab kev siv tshuab tsim feem ntau. Cov kav dej no yuav tsum tau ua kom tau raws li cov kev cai tshwj xeeb kom ntseeg tau tias muaj kev ntseeg siab thiab kev nyab xeeb hauv siab -siab, siab - kub, lossis kev nyab xeeb- cov ntawv thov tseem ceeb. Txawm li cas los xij, tus qauv no tsis siv rau siab -kev ua tau zoo seamless ncig tsis yog- alloy steel kav, structural seamless ncig steel kav, seamless steel kav ua los ntawm tshav kub- steel resistant, precision seamless steel kav, thiab seamless steel kav nrog nominal luj thiab ntxiv - hnyav kev sib txuas.
II. Steel Qib Classification
Tus qauv DIN 1629 suav nrog cov kav dej ua los ntawm ntau qib steel, xws li St37.0, St44.0, St52.0, thiab lwm yam. Kev xaiv ntawm qib steel yog txiav txim siab los ntawm tus neeg yuav khoom thiab yuav tsum ua raws li cov tshuaj muaj pes tsawg leeg thiab cov cuab yeej cuab tam uas tau teev tseg hauv tus qauv.
III. Kev Xav Tau
Txoj kev tsim khoom: Cov kav dej tuaj yeem tsim los ntawm cov txheej txheem xws li kub dov, txias dov, kub nias txoj kev, kub kos duab, thiab kos duab txias. Txoj kev tsim khoom yuav tsum tau qhia nyob rau hauv cov chaw tsim khoom cov lus qhia tshwj tsis yog tias pom zoo rau thaum txiav txim.
Kev Xa Khoom: Cov kav dej feem ntau xa tuaj rau hauv qhov kub -rolled mob. Yog hais tias tus me nyuam nyob rau hauv ib tug normalized mob yuav tsum tau, nws yuav tsum tau pom zoo raws li thaum lub sij hawm xaj thiab cim nrog tsab ntawv "N".
Tshuaj muaj pes tsawg leeg: Cov tshuaj lom neeg muaj pes tsawg leeg ntawm cov kav dej yuav tsum ua raws li cov txheej txheem teev tseg, suav nrog cov ntsiab lus txwv rau cov ntsiab lus xws li carbon, silicon, manganese, phosphorus, thiab sulfur. Piv txwv li, cov ntsiab lus carbon nyob rau hauv St52.0 kav yuav tsum tau tswj ntawm tsawg dua los yog sib npaug rau 0.2%, thiab cov ntsiab lus silicon yuav tsum tau tswj ntawm tsawg dua los yog sib npaug li 0.55%.
Mechanical Properties: Cov kav dej yuav tsum muaj cov khoom siv zoo, nrog rau kev tawm dag zog, lub zog tensile, thiab elongation. Piv txwv li, lub zog tawm ntawm St52.0 cov kav dej yuav tsum siab dua lossis sib npaug ntawm 355 MPa, thiab lub zog tensile yuav tsum nyob rau hauv thaj tsam ntawm 490-630 MPa.
Txheej Txheem Kev Ua Haujlwm: Cov kav dej yuav tsum tau kuaj xyuas kom paub tseeb tias lawv cov txheej txheem ua tau zoo. Qhov sib nrug H rau qhov kev sib tw flattening yuav tsum tau txiav txim siab raws li cov kab uas hla thiab phab ntsa thickness ntawm cov kav dej.
Weldability: Cov kav dej yuav tsum muaj qhov zoo weldability kom ua tau raws li kev thov engineering.
Surface condition: Sab hauv thiab sab nrauv ntawm cov kav dej yuav tsum yog du, tsis muaj cov kab nrib pleb, quav, khawb, kev sib txuas, thiab lwm yam tsis xws luag. Nyob rau hauv qhov tso cai sib txawv ntawm cov phab ntsa tuab, qhov tsis xws luag tuaj yeem ua rau hauv av, tab sis kev kho vuam tsis raug tso cai.
Leak-Tightness Test: Cov kav dej yuav tsum tau kuaj xyuas hydrostatic los yog tsis yog -kev kuaj kev puas tsuaj los xyuas kom meej tias lawv cov xau{1}} nruj. Qhov ntsuas hydrostatic siab yuav tsum yog 50 bar, nrog lub sijhawm tuav tsawg kawg yog 5 vib nas this, thiab tsis tso cai tawm.
IV. Kev tshuaj xyuas thiab kuaj
Qhov chaw soj ntsuam: Ua nyob rau hauv qhov chaw tsim khoom.
Kev soj ntsuam Scope: suav nrog tshuaj lom neeg kev tshuaj ntsuam xyuas, kev tshuaj xyuas cov cuab yeej cuab tam, kev sim kev ua haujlwm, kev xau- kuaj nruj, thiab lwm yam.
Sampling thiab Specimen Preparation: Yuav tsum tau ua raws li cov txheej txheem kev cai.
Re-kev tshuaj xyuas: Yog tias qhov kev tshuaj ntsuam xyuas tsis ua raws li tus qauv yuav tsum tau ua, rov- kev tshuaj xyuas tuaj yeem ua tiav.
