1. Lo lus nug: Vim li cas 20 # steel yeeb nkab yog ib qho ntawm cov khoom siv dav tshaj plaws siab - zoo carbon structural steel kav hauv kev lag luam? Dab tsi yog nws lub ntsiab ntawm daim ntawv thov scenarios?
Teb: Qhov laj thawj tseem ceeb yog vim li cas 20 # steel yeeb nkab tau dhau los ua kev siv dav heev - cov pa roj carbon zoo steel yeeb nkab hauv kev lag luam yog nws cov khoom sib npaug (lub zog nruab nrab, zoo plasticity thiab toughness), kev ua haujlwm zoo (zoo vuam, txiav, thiab tsim kev ua haujlwm), cov ntsiab lus tsis zoo, kev ua haujlwm ruaj khov, thiab tus nqi nruab nrab, ntsuas kev ua tau zoo thiab tus nqi. Nws cov xwm txheej tseem ceeb muaj xws li: 1. Cov kav dej thauj mus los: xws li cov kav dej thauj cov roj, cov roj av, thiab chav dej (siab 1.6-4.0MPa), muaj peev xwm tiv taus qee qhov siab thiab muaj lub zog zoo, ua rau nws tsis tshua muaj kev tawg vim muaj kev cuam tshuam xov xwm; 2. Machining qhov chaw: xws li shafts, tes tsho, iav blanks, txuas rods, thiab lwm yam., nws lub zog tuaj yeem txhim kho los ntawm kev kho cua sov kom tau raws li cov kev xav tau ntawm cov khoom siv tshuab; 3. Welded structural Cheebtsam: xws li welded thav duab ntawm engineering machinery thiab structural Cheebtsam ntawm lub tsheb chassis, nrog zoo vuam kev ua tau zoo los xyuas kom meej cov qauv stability; 4. Cov hlab ntsha siab: xws li cov plhaub ntawm cov hlab ntsha me me, nrog cov yas zoo thiab tawv, muaj peev xwm tiv taus qee qhov siab thiab cuam tshuam.
2. Nqe lus nug: Q255 thiab Q275 steel kav siv tau los thauj cov xov xwm corrosive? Vim li cas? Yog tias lawv yuav tsum tau siv, yuav tsum ntsuas dab tsi?
Teb: Q255 thiab Q275 steel kav tsis haum rau ntev - lub sij hawm thauj ntawm corrosive media (xws li acids, alkalis, ntsev tov, seawater, thiab lwm yam) vim hais tias lawv yog cov zoo tib yam carbon structural steels tsis muaj xeb tiv thaiv los yog corrosion kuj. Ntev -lub sij hawm sib cuag nrog corrosive media yuav ua rau oxidation corrosion, ua rau thinning ntawm cov yeeb nkab phab ntsa, txo lub zog, thiab thaum kawg los yog tawg. Yog tias Q255 thiab Q275 steel kav yuav tsum tau siv los thauj cov xov xwm corrosive, cov nram qab no tiv thaiv- kev tiv thaiv corrosion yuav tsum tau ua: 1. Siv tshuaj tiv thaiv-corrosion kho rau cov yeeb nkab steel nto, xws li galvanizing (kub-dip galvanizing, txias galvanizing) los yog siv cov tshuaj tiv thaiv corosion (13) polyurethane coatings) cais qhov nruab nrab ntawm cov yeeb nkab steel nto; 2. Kev tshuaj xyuas thiab tswj cov kav hlau tsis tu ncua, thiab kho cov txheej txheem tiv thaiv kev puas tsuaj tam sim; 3. Ntxiv corrosion inhibitors rau nruab nrab kom qeeb tus nqi corrosion, tab sis txoj kev no tsuas yog tsim rau cov xov xwm tsis muaj zog corrosive.
3. Lo lus nug: Dab tsi yog qhov txawv ntawm cov ntawv thov ntawm 10 # thiab 20 # steel kav hauv machining teb? Dab tsi ntawm cov khoom siv kho tshuab uas lawv tsim nyog rau kev tsim khoom?
Teb: Qhov sib txawv ntawm daim ntawv thov ntawm 10 # thiab 20 # steel kav hauv machining teb feem ntau yog los ntawm qhov sib txawv ntawm lawv lub zog thiab yas: 10 # steel kav muaj lub zog qis thiab zoo plasticity, ua rau lawv tsim nyog rau kev tsim cov khoom siv uas tsis tas yuav muaj lub zog siab tab sis muaj cov kev xav tau siab rau plasticity thiab formability, xws li: stamped qhov chaw (gaskets, sealing 3 qhov chaw), nyias nyias. thiab qis-load ncej qhov chaw uas tsis xav tau kev kho cua sov; 20 # steel kav muaj lub zog nruab nrab thiab cov yas zoo, ua rau lawv tsim nyog rau kev tsim cov khoom siv kho tshuab uas xav tau qhov sib npaug ntawm lub zog thiab cov yas, thiab nws lub zog tuaj yeem txhim kho los ntawm kev kho cua sov, xws li: iav blanks, txuas rods, nruab nrab -load ncej qhov chaw (xws li tshuab cuab tam spindles, motor shafts), lub tes tsho (xws li pins, thiab lwm yam.) quenching thiab tempering kev kho mob, lawv muaj peev xwm ua tau raws li lub load- bearing yuav tsum tau ntawm txhua yam khoom.
V. Kev txheeb xyuas thiab kev saib xyuas
4. Lo lus nug: Yuav ua li cas kom paub meej Q255, Q275, 10#, thiab 20# steel kav? Dab tsi yog qee txoj hauv kev yooj yim thiab yooj yim?
Teb: Muaj peb txoj hauv kev tseem ceeb rau kev txheeb xyuas sai, uas yooj yim, yooj yim rau kev siv, thiab tsim nyog rau ntawm - qhov chaw ua haujlwm: 1. Cov tsos thiab cim cim: High- zoo carbon structural steel kav (10#, 20#) muaj qhov du, tsis muaj qhov pom tseeb oxide nplai, thiab cov cim meej, feem ntau qhia cov chaw tsim khoom, thiab qib Cov pa roj carbon zoo tib yam steel kav (Q255, Q275) tej zaum yuav muaj me ntsis oxide nplai rau ntawm qhov chaw, thiab cov cim yog qhov yooj yim, feem ntau cim nrog "Q255" lossis "Q275". 2. Kev Taw Qhia Hardness: Ntsuas qhov hardness nrog lub hardness tester. Lub hardness ntawm siab tshaj mus rau qis tshaj yog Q275> Q255> 20#> 10#. Kos cov yeeb nkab nrog cov khoom tawv (xws li cov ntsia hlau hlau). Qhov ntiav qhov khawb, qhov siab dua qhov hardness, uas tuaj yeem siv rau kev txiav txim siab ua ntej.
3. Spark Identification: Sib tsoo lub npoo ntawm cov yeeb nkab steel nrog lub log sib tsoo thiab saib cov sparks: 10# steel sparks zoo, muaj ob peb ceg, thiab xim sib dua; 20 # steel sparks me ntsis coarser dua 10 # steel, nrog me ntsis ntxiv ceg; Q255 steel sparks kuj ntxhib, muaj ntau ceg, thiab me me ntawm tawg; Q275 steel sparks yog qhov coarsest, nrog ntau ceg, pom tseeb tawg, thiab xim ci dua.
5. Nqe Lus Nug: Cov teeb meem puas tsuaj dab tsi tshwm sim hauv Q255 steel kav thaum siv? Yuav ua li cas tu txhua hnub? Teb: Tej teeb meem kev puas tsuaj ntawm Q255 steel kav thaum siv: 1. Corrosion puas: nto oxidation thiab xeb; ntev - lub sij hawm raug rau cov av noo thiab corrosive ib puag ncig tuaj yeem ua rau thinning ntawm phab ntsa thickness; 2. Kev puas tsuaj deformation: Kev thauj khoom ntau dhau lossis cuam tshuam tuaj yeem ua rau cov yas deformation xws li khoov thiab denting; 3. Kev puas tsuaj pob txha: Nyob rau hauv qis - qhov kub thiab txias ib puag ncig los yog nyob rau hauv ntev - lub sij hawm qaug zog loads, brittle fracture los yog qaug zog tawg tuaj yeem tshwm sim. Txoj kev tu txhua hnub: 1. Tsis tu ncua ntxuav cov xeb thiab cov roj stains ntawm cov yeeb nkab steel, ua kom lub ntsej muag qhuav thiab huv si, thiab tsis txhob xeb los ntawm qhov chaw ntub dej; 2. Rau cov kav hlau uas tawm sab nraum zoov, tsis tu ncua siv los tiv thaiv- cov coatings los yog galvanize los txhim kho corrosion kuj; 3. Tsis tu ncua xyuas cov kev ntxhov siab ntawm cov yeeb nkab steel, tsis txhob overloading, thiab hloov cov kav hlau deformed los yog puas hauv lub sijhawm; 4. Nyob rau hauv qhov chaw uas tsis muaj qhov kub thiab txias, tsis txhob muaj kev cuam tshuam ntawm cov yeeb nkab steel, thiab ua cov txheej txheem rwb thaiv tsev yog tias tsim nyog.
