1 Carbon Steel Tam sim no, feem ntau siv cov khoom nyob hauv kev lag luam kev sib tw yog carbon hlau vim nws cov yas siab thiab nws tus nqi qis dua piv rau lwm cov ntaub ntawv.
Carbon hlau tau faib ua ultra tsawg carbon, tsawg carbon me ntsis steel, qis carbon, nruab nrab carbon hlau, thiab siab carbon raws li cov theem ntawm cov ntsiab lus ntawm cov ntsiab lus.
Ultra-tsawg carbon hlau, Tail qhov lauj kaub ntsia thawv khoom.
Tsawg cov pa me ntsis rau cov ntsuas screws uas tsis tas yuav tsum tau kho tshav kub kub (hardening), muaj zog chav kawm 3.6
Cov pa roj carbon tsawg, rau cov ntsuas pa uas tsis tas yuav tsum tau kho tshav kub kub (sib zog), muaj zog 4.8
Nruab nrab carbon steel, rau feem screws tsis muaj cov khoom siv tshwj xeeb, lub zog 8.8
Cov pa roj carbon feem ntau, feem ntau tsis siv rau lub fwj tshuaj
2 Stainless hlau Stainless hlau feem ntau yog dej num raws li lub xeev ntawm lub koom haum: austenitic hlau, martensitic hlau, ferritic steel
Austenite (18% Cr, 8% Ni) muaj ntau tshaj 18% chromium, thiab tseem muaj txog 8% tus mob nickel thiab ib qho me me ntawm molybdenum, titanium, thiab nitrogen. Zoo zuag qhia tag nrho, ua haujlwm rau ntau yam kev xeb hluav taws xob, xws li cov hlau muaj cov yas zoo, muaj zog, muaj kev sib tshuam thiab kev ua kom tsis muaj zog.
Ferritic stainless steels muaj corrosion kuj siab thiab oxidation tsis vim lawv cov ntsiab lus siab chromium, tab sis lawv muaj cov neeg kho tshuab tsis zoo thiab cov txheej txheem. Brittleness tshwm sim thaum lub ferritic stainless steels tshaj 400 ° C. Yog li, lawv siv ntau yam khoom siv hauv tsev thiab khoom siv.
Martensite martensite (13% Cr) muaj zog dua, hardness thiab hnav tsis taus vim nws cov ntsiab lus dua, tab sis nws cov corrosion kuj yog me ntsis tsis. Nws yog siv rau cov khoom siv high hlau thiab corrosion kuj. Ntawm qee qhov chaw, nws tsuas siv tau tom qab ua haujlwm kub.
SUS 410 yog hom qauv ntawm martensitic stainless hlau. Feem ntau tom qab cov khoom molded, nws yuav tsum tau raug tempered kom tau raws li lub zog uas yuav tsum tau.
3 Cov tooj dag yog ib qho hlau tooj tooj liab thiab zinc, uas yog tiv thaiv kev txhuam, hlawv hloov, thiab hluav taws xob. Nws yog feem ntau siv rau screws nrog conductive uas yuav tsum tau thiab tsawg mechanical zog.
4 Copper yog ib hom xim dawb, uas feem ntau yuav suav tau tias yog tooj liab ntshiab. Nws cov conductivity thiab yas yog zoo dua, tab sis nws lub zog thiab hardness yog zuj zus.
5 Txhuas tau zoo thermal conductivity, conductivity, thiab ductility. Nyob rau tej co co, cov conductivity yog thib ob tsuas yog nyiaj thiab tooj, tab sis qhov ceev yog tsuas yog 1/3 ntawm cov hlau.
Vim nws txoj kev zoo nkauj, txhuas yog siv los tsim ntau hom kev ua si