Nyob rau hauv lub teb ntawm precision manufacturing, kev sib xyaw ntawm stainless hlau thiab CNC ua tshuab yog "golden ua ke" ntawm niaj hnub kev lag luam. Los ntawm aerospace fasteners mus rau kev kho mob- qib kev phais cov cuab yeej, stainless hlau tau dhau los ua cov khoom siv rau siab- qhov kawg ntawm kev tsim khoom vim nws zoo heev corrosion resistance, mechanical zog thiab tu cev. CNC ua tshuab tau ua tiav cov teeb meem kev lag luam xws li cov khoom siv hlau tsis muaj zog thiab cov cuab yeej poob los ntawm tsib -axis linkage txiav thiab micron- theem precision tswj.Hnub no, peb tham txog cov lej ntawm feem ntau 304 thiab 316 stainless hlau lub ntsiab lus.
Lub ntsiab ntawm stainless hlau yog: austenitic stainless hlau, ferritic stainless hlau, duplex stainless hlau (duplex feem ntau yog hais txog: austenite-ferrite ob theem), martensitic thiab nag lossis daus hardening stainless hlau. Ntawm lawv, austenitic stainless hlau yog qhov siv dav tshaj plaws, suav nrog ntau dua 2/3 ntawm tag nrho cov hlau stainless uas tsim nyob hauv lub ntiaj teb. Qhov no yog vim hais tias piv nrog rau lwm hom stainless hlau, nws muaj cov yam ntxwv ntawm corrosion kuj, zoo ductility, siab thiab tsis kub tsis kam thiab zoo weldability, thiab feem ntau tsis yog -magnetic.
Cov cai ntawm 304 thiab 316 stainless hlau feem ntau txhais li cas?
Ua ntej nkag siab lawv lub ntsiab lus, nws yog ib qho tsim nyog yuav tsum nkag siab txog lawv cov keeb kwm. Qhov tseeb, peb lub npe -tus lej no yog los ntawm American Iron and Steel Institute (AISI), uas tau luam tawm cov lej no hauv nws "Steel Products Handbook" hauv xyoo 1974. Cov ntaub ntawv xov tooj tuaj yeem siv los nkag siab txog hom khoom siv stainless hlau sib txawv, thiab tseem muab cov ntaub ntawv tseem ceeb txog lawv cov tshuaj lom neeg muaj pes tsawg leeg, lub cev muaj zog thiab thaj tsam ntawm daim ntawv thov. Tom qab ntawd, cov lej lej no tau siv dav hauv Tebchaws Meskas, qhov chaw lawv pib, thiab tau lees paub los ntawm cov neeg siv khoom tshwj xeeb stainless hlau feem ntau thiab cov neeg siv. Tom qab ntawd lawv tau siv dav hauv lwm lub tebchaws. Piv txwv li, stainless hlau nyob rau hauv Nyiv kuj siv lub npe AISI, tab sis nrog cov ntawv SUS (steel siv stainless) nyob rau hauv pem hauv ntej, xws li SUS 304.
Tom qab ntawd, qhov kev taw qhia ntawm "Uniform Numbering System" ua ke tsim los ntawm ASTM (American Society for Testing and Materials) thiab SAE (American Society of Automotive Engineers) ua rau AISI qeb duas tshwj xeeb, tab sis tus lej siv thawj tsab ntawv S + tsib- lej cim, xws li 30 40 UNS S304 thiab 30 UNS S304. 304l ua.
Teb chaws Europe muaj lwm qhov system, ua raws li EN tus qauv tsim los ntawm European Committee for Standardization (CEN), xws li EN 1.4301 rau 304 stainless hlau. Thaum kawg, ISO tus qauv coj mus rau hauv tus account qhov sib txawv ntawm ob pawg loj hauv Tebchaws Europe thiab Tebchaws Meskas, thiab ua ke ob qho tib si. Piv txwv li, cov khoom siv ntawm 304 stainless hlau yog: 4301-304-00-I, nrog tus lej European nyob rau pem hauv ntej thiab tus lej Asmeskas hauv nruab nrab.
Cia peb rov qab mus rau lub ntsiab lus ntawm cov cai. Cov lej pib nrog "2" thiab "3" feem ntau sawv cev rau austenitic stainless hlau, thaum martensitic thiab ferritic stainless hlau feem ntau pib nrog 4. Yog li ntawd, thaum peb pom "3" thaum pib ntawm 304 thiab 316, peb paub tias lawv yog ob qho tib si austenitic stainless hlau. Txawm li cas los xij, ob tus lej tom qab "3" tsis muaj lub ntsiab lus tshwj xeeb, lawv tsuas yog cov lej ntawm cov khoom sib txawv. Qhov no yog vim li cas peb tau hais txog "tus lej" tsis yog "qib" hauv ntu dhau los. Yog tias koj xav nkag siab txog cov tshuaj muaj pes tsawg leeg, koj yuav tsum saib qib. Piv txwv li, cov qib sib xws ntawm 304 stainless hlau hauv ISO tus qauv yog X5CrNi18-10. Hauv Suav teb, raws li lub teb chaws tus qauv (GB / T 20878), qib 304 stainless hlau yog 06Cr19Ni10.(Tau qhov twg los: iMechanics 机械)
