1. Dab tsi yog quenching soft point
Lub thiaj li hu ua quenching soft point yog lub unquenching mos qhov chaw ntawm qhov chaw.Yog li ntawd, nws kuj yog hu ua lub mos point (softspot).Qhov muag taw tes ntawm cov dej quenching yog hnyav dua li cov roj quenching, vim hais tias cov nto muaj chav zaj duab xis. kom qeeb qeeb ntawm qhov txias txias.Qhov tshwm sim no feem ntau hu ua Leiden frosting phenomenon.Txawm tias cov roj quenching tsis txaus hardness, uas yog, tsis txaus quenching, tab sis nws tsis yooj yim rau quenching mos point.Txawm li cas los xij, underquenching qhov twg decarbonization los yog oxidation ntawm daim tawv nqaij. zoo ib yam li quenching soft point.
Nws yog hais tias nyob rau hauv lub caij ntuj nag lub caij ntuj no quenching soft point, yog hais tias cov av ntawm lub quenching site yog ntau tshaj 55%, nws yog feem ntau quenching mos point.
Qhov saum npoo ntawm qhov chaw siab quenching yog qhov ua rau cov caws pliav, lossis Japanese riam ntug, cov xim ci yog quenching mos point.Lub microtissue ntawm quenching soft point yog martensite ntxiv rau nyias pearlophyte (nodular flexter) nrog cov xim ci.
2. Yuav ua li cas thiaj nrhiav tau lub quenching soft point
Feem ntau muaj peb txoj hauv kev los nrhiav cov ntsiab lus muag quenched. Thawj txoj kev yog pom lub teeb tawny xim ntawm qhov sib tsoo: txoj kev thib ob yog qhov thib peb txoj kev yog siv cov kua qaub corrosion kom pom cov quenching soft point;uas yog, mus rau dip cov khoom rau hauv 50% hydrochloric acid dej tov (dej ntub dej) rau corrosion, yog hais tias qhov chaw nto tshwm dub, qhov chaw dub yog lub quenching mos point.Txawm li cas los xij, nws yuav tsum tau muab sau tseg tias tsis kub tempering (180). ~ 200C) qhov chaw yog corroded nyob rau hauv qhov chaw hardened, thiab xim nyob rau hauv lub unhardened qhov chaw.Qhov tob ntawm quenched txheej yuav ntsuas tau siv txoj kev no.
3. Yuav ua li cas tiv thaiv quenching los ntawm qhov muag muag
Txhawm rau tiv thaiv qhov quenching ntawm cov ntsiab lus muag, tsis txhob oxidize lossis decarbonize qhov chaw thaum cua sov ua ntej. Secondly, txhawm rau tiv thaiv qhov chaw ntawm qhov chaw txuas nrog dej vapor zaj duab xis, nws yog qhov zoo tshaj plaws kom ua tiav cov kua quenching thiab siv cov tshuaj tsuag dej rau Tsis tas li ntawd, yog tias quenching nrog 10% dej ntsev tuaj yeem tiv thaiv kom tsis txhob quenching ntawm cov ntsiab lus muag. Ntxiv rau, thov ib txheej nyias ntawm polishing hmoov rau ntawm qhov chaw quenching kuj yog ib txoj hauv kev zoo los tiv thaiv cov quenching ntawm mos. cov ntsiab lus.Cov hmoov polishing txias sai dua li cov hlau tsis muaj coated thiab tsis quench qhov muag muag, yog li thov polishing hmoov hauv Japanese riam quenching lag luam yog ib txoj kev zais cia.Tab sis nws yuav tsum tau noj.Yog hais tias polishing hmoov yog tuab heev, qhov txias yog qeeb, nws tsis nyuaj.
Cov hmoov polishing yog nyias thiab siv rau ntawm qhov chaw quenching, thiab thaum lub quenching, qhov saum npoo tsis nyob ib puag ncig los ntawm cov yeeb yaj kiab, uas dhau los ua npuas me me thiab nce siab, yog li nws txias sai heev.
Raws li tus neeg sawv cev hnav khaub ncaws, ntxiv rau cov hmoov polishing.Thiab tshauv nrog kaolin thiab dej;mica tsis muaj av nplaum thiab dej: pumice nrog cov av nplaum thiab dej, cov no yog cov zaub mov zoo.
Tsis ntev los no, dej-soluble quenching tov (polymer quenching tov) yog dav siv los ntawm quenching roj, uas muaj inverse solubility thiab muaj peev xwm tsim ib zaj duab xis rau saum npoo thaum rhuab los ntawm cov khoom kho.Thaum qhov kub thiab txias poob mus txog 90 ℃ (qee qhov kev daws teeb meem yog 74 ℃), lub npog ntsej muag yog yaj. Yog li ntawd, cov cua txias hauv qhov kub thiab txias tuaj yeem nqa tawm sib npaug los tiv thaiv qhov quenching ntawm cov ntsiab lus muag.Cov nyhuv yog zoo li. thov cov hmoov txhuam nrog nws}
Tsis tas li ntawd, yog tias qhov txias txias ntawm ultrasonic ”25000 lub lis piam / s), lub vapor zaj duab xis kuj tuaj yeem raug tshem tawm zoo, yog li qhov quenching ntawm cov ntsiab lus muag kuj tuaj yeem tiv thaiv.Ultrasonic txias yog txoj kev txias tshiab.
Shandong Jute Steel Yeeb Nkab Co., Ltd.
Hu rau: Mr. Ji
WhatsApp: +86 18865211873
WeChat: +86 18865211873
E-mail: jutesteelpipe@gmail.com
E-mail: juteguanye@aliyun.com
Post lub sij hawm: Mar-12-2022
