Kev xaiv cov khoom siv thiab kev kho cua sov txheej txheem ntawm lub zog siab bolts tau soj ntsuam tag nrho

1. kev xaiv cov khoom siv: dual adaptation ntawm kev ua tau zoo thiab scene

Lub hauv paus ntawmsiab zog boltkev ua tau zoo yog nyob rau hauv kev sib koom tes optimization ntawm kev xaiv cov khoom siv thiab kev kho cua sov txheej txheem.Cov hauv qab no yog cov kev xaiv cov khoom tseem ceeb thiab cov ntsiab lus ntawm kev lag luam:

1. Nruab nrab carbon alloy steel: thawj xaiv rau siab zog

o Hom qib: 42CrMo, 35CrMoA, 40Cr thiab lwm yam ntaub ntawv uas muaj siab hardenability thiab lub zog toughness tshuav nyiaj li cas, ua qhov kev xaiv ntawm 10.9 thiab 12.9 chav kawm bolts, tshwj xeeb tshaj yog haum rau cua zog, nuclear zog thiab lwm yam hnyav load scenarios.

o hardenability yuav tsum tau: Cov khoom yuav tsum xyuas kom meej tias ntau tshaj 90% ntawm cov quenched seem yog martensitic qauv, kom tsis txhob muaj cov tsis-martensitic qauv nyob rau hauv lub plawv ua rau lub zog poob.Piv txwv li, M48-M64 bolts ua los ntawm 42CrMoA steel tuaj yeem ua tau raws li 10.9 kev ua haujlwm Performance index los ntawm quenching ntawm 840-860 ℃ thiab tempering ntawm 540 ℃.

2. Tsawg carbon alloy steel: ob qho tib si lub zog thiab kev tiv thaiv kom ncua kev puas tsuaj

o sawv cev rau cov khoom siv: 20MnTiB, 35VB, thiab lwm yam yog tsim rau 10.9 chav kawm bolts hauv qab M24, thiab lawv cov ntsiab lus phosphorus tsawg thiab siab purity ciam teb tuaj yeem txo qhov kev pheej hmoo ntawm kev tawg qeeb.

3. Stainless hlau: Ib qho kev daws teeb meem rau ib puag ncig tshwj xeeb

o Austenitic stainless hlau (xws li 304, 316) nrog corrosion kuj, dav siv nyob rau hauv Marine engineering thiab chemical khoom;Martensitic stainless hlau (xws li 410) yog tempered kom ua tiav lub zog siab.

4. Cov khoom siv tswj lub koom haum

o spherodizing annealing pretreatment: nruab nrab carbon steel yuav tsum tau isothermal annealing ntawm 700 ℃ los hloov lub flake pearlite rau hauv ib lub pob, txhim kho lub txias taub hau yas (deformation tus nqi mus txog 60% -80%), thiab tsis txhob txias taub hau tawg.

2. txheej txheem kev kho cua sov: qhov tseeb qhov sib npaug ntawm lub zog thiab toughness

Kev kho cua sov yog qhov txuas tseem ceeb los txiav txim siab qhov ua tau zoo ntawmbolts, thiab nws yog ib qho tsim nyog kom ua tiav kev txhim kho cov cuab yeej cuab tam los ntawm "quenching + tempering" txheej txheem tempering.

1. Spheroidizing annealing txheej txheem

o Cov txheej txheem tsis: nruab nrab carbon steel yog txias maj mam tom qab cua sov ze ntawm qhov tseem ceeb (700 ℃);Nruab nrab carbon alloy steel isothermal spheroidization annealing (AC1 + 20-30 ℃ cua sov, 700 ℃ isothermal) los xyuas kom meej lub uniformity ntawm cov qauv.

2. quenching txheej txheem optimization

o Kev tswj qhov kub thiab txias: Qhov ntsuas kub ntawm qhov nruab nrab carbon alloy steel yog 840-870 ℃, xws li 42CrMoA steel siv 850-870 ℃ cua sov tuaj yeem kho cov nplej thiab txhim kho qhov tob ntawm quenching txheej.

o txias nruab nrab xaiv: roj quenching (L-AN10 ~ L-AN32) yog lub ntsiab tov, noj rau hauv tus account txias ceev thiab deformation tswj;Loj specification bolts (xws li M30 thiab saum toj no) yog quenched nrog PAG aqueous tov kom tsis txhob quenching tawg.

3. Tempering txheej txheem innovation

o Kev ntsuas kub: tempering kub ntawm 42CrMo steel yuav tsum tau tswj ntawm 500-540 ℃, uas tsis tsuas yog tshem tawm quenching kev nyuaj siab, tab sis kuj tswj qhov sib npaug ntawm tensile zog (≥950MPa) thiab seem shrinkage (≥44%).

o brittleness tiv thaiv thiab tswj: Rau 12.9 chav kawm bolts, dej txias los yog roj txias yog siv kom sai dhau 370-560 ℃ tempering brittle cheeb tsam kom ntseeg tau tias qhov cuam tshuam toughness raws li tus qauv.

4. Kev ntsuam xyuas thiab kev tswj xyuas zoo

o Cov ntsiab lus tseem ceeb: hardness (32-38HRC), tensile zog (≥1040MPa), elongation tom qab tawg (≥8%) thiab metallographic qauv (tempered sorbite + trace ferrite) yuav tsum tau soj ntsuam nruj me ntsis.

o Kev zam tsis raug: tshem tawm phosphorus polarization txheej (txias thiab nkig qhov chaw) thiab decarburization txheej (lub ntsiab ua rau tsis txaus hardness), thiab ua tiav nto "zero oxidation" los ntawm kev nruam mesh siv rau cua sov tiv thaiv huab cua.

3. kev lag luam mob cov ntsiab lus thiab localization breakthrough

1. Technical bottleneck

o 12.9 chav kawm bolts cia siab rau kev xa khoom: vim cov khoom siv tsis txaus purity (siab P, S cov ntsiab lus) thiab cov txheej txheem tempering tsis ruaj khov, cov khoom siv hauv tsev muaj qhov sib txawv ntawm qhov cuam tshuam toughness thiab ncua kev tawg tsis kam piv nrog cov khoom txawv teb chaws.

2. Localization kev vam meej

o Loj specification bolt breakthrough: Los ntawm optimizing lub quenching kub (850-870 ℃) thiab tempering tsis (500 ℃ × 180min) ntawm 35CrMoA steel, qhauj xws li Shuihui Jiangtianbao Industrial pom tau hais tias loj zus tau tej cov M30-M36 specification 10.9 bolts.

o Txheej txheem kev txhim kho: Qhia txog kev tswj cov cua kub tsis tu ncua, tswj qhov tob ntawm decarburization txheej (≤0.02mm), thiab txhim kho cov khoom sib xws.

4. Cov qauv yav tom ntej: kev txawj ntse thiab kev ua haujlwm siab ntawm ob lub log tsav

Nrog rau kev txhim kho cov ntsia liaj qhov rooj kev ua tau zoo nyob rau hauv lub tshav pob ntawm cov khoom siv hluav taws xob tshiab thiab aerospace, kev lag luam tau nrawm nws cov kev hloov pauv hauv ob qho kev qhia:

• Cov txheej txheem kev txawj ntse: kev saib xyuas lub sijhawm tiag tiag ntawm kev kho cua sov tsis ua raws li Internet ntawm Yam kom ua tiav kev tswj xyuas qhov nyuaj ntawm qhov sib txawv ntawm qhov sib txawv ≤2HRC;

• Cov ntaub ntawv siab kawg: Kev txhim kho cov hlau tsis tshua muaj zog ultra-siab zog (xws li 40CrNiMoA), lub hom phiaj cuam tshuam ua haujlwm ≥60J (-40 ℃), txhawb nqa tag nrho thaj chaw ntawm 12.9 bolts.

Xaus

Cov khoom xaiv thiab kev kho cua sov ntawmmuaj zog boltsyog "kev siv tshuab zais zais" hauv kev tsim cov khoom lag luam precision, uas yuav tsum muaj kev tshawb fawb thiab nruj txheej txheem tsim, tab sis kuj tso siab rau kev sib koom tes tshiab ntawm tag nrho cov saw ntawm cov khoom siv, khoom siv thiab kev sim.Nrog rau kev ua haujlwm tsis tu ncua ntawm cov lag luam hauv tsev hauv cov txheej txheem tseem ceeb, "lub zog muaj zog bolts" ua nyob rau hauv Suav teb tau txav los ntawm "usable" mus rau "yooj yim siv" thiab "ntev", muab cov khoom lav rau kev ywj pheej ntawm cov khoom siv high-end.