Ukukhethwa kobushushu obushushu kwi-PC yentsimbi yokufudumeza ubushushu

(1) Umgaqo wokukhetha iqondo lobushushu lobushushu kwiPC yentsimbi Eyona nto ilunge kakhulu kwiPC yentsimbi phantsi kweemeko zenkonzo yi-troostite enobulali. Lo mbutho ungoyena mntu unokuxhathisa ukuphumla. Ubudlelwane phakathi kobushushu be tempering kunye neepropathi zoomatshini zentsimbi ezintathu eziphantsi, eziphakathi nezisezantsi. Itrostostite enobushushu inokufunyanwa ngobushushu obuphakathi (350 ~ 500 ° C), kwaye inqanaba lokuphumla lelona lincinci, oko kukuthi, ukuxhathisa ukuphumla koxinzelelo yeyona nto ilungileyo. Ke ngoko, intsimbi yePC

Ukukhethwa kwamaqondo obushushu ashushu we ukufudumeza iziko Kufuneka iqinisekise ukuba i-martensite ecinywayo iguqulwa yenziwa yi-troostite, oko kukuthi, kusetyenziswa ubushushu obuphakathi. Ubushushu obushushu be-silicon ingot ephantsi kwe-alloy PC yesinyithi sokufudumeza ubushushu zi-400-500 ° C.

(2) Indlela yoxinzelelo lokuphumla koxinzelelo lwentsimbi yePC uxinzelelo lokuphumla koxinzelelo lwentsimbi yipropathi yomatshini enxulumene nobomi benkonzo yentsimbi yePC. Ibhekisa kwinkqubo apho i-elastic deformation yentsimbi iguqulwa yenziwa ngombala weplastiki phantsi koxinzelelo. Ngokukhawuleza inkqubo yenguqu, kokukhona i-deformation yeplastikhi yesinyithi kunye nokusondela kuyo kukwaphuka. Xa i-deformation yeplastiki ifikelela kumda, i-steel break. Ke ngoko, kuyathenjwa ukuba isantya esisezantsi solu tshintsho, kokukhona ixesha lenkonzo liyintsimbi. Ngesi sizathu, kuyinqweneleka ukuba inqanaba lokuphumla kwezinto zentsimbi zincinci kangangoko. Indlela esebenzayo yokunciphisa izinga lokuphumla kukunyusa amandla emveliso kunye nokugcina ukuqina okuhle. Ukuxhathisa ukuphumla koxinzelelo lwentsimbi yePC kunobudlelwane obuncinci kunye nokwenziwa kweekhemikhali. Kuxhomekeka ikakhulu kubume bentsimbi egqityiweyo. Uhlalutyo lwendlela yoxinzelelo lokuphumla koxinzelelo kwizakhiwo ezahlukeneyo ezinobushushu be-martensite icinywe ngolu hlobo lulandelayo.

I-troostite enobushushu yimveliso enobushushu obuphakathi kwaye ineyona nto inokuxhathisa ukuphumla koxinzelelo. Itrostostite enobushushu sisakhiwo seesamente esasasazeke kakhulu esisasazwe kumzimba wentambo yentsimbi. Olu hlobo lwesicwangcisi sinika isinyithi amandla aphezulu esivuno kunye nobungqongqo obuthile, kunye nokuchasana okunamandla kokujika kweplastiki.

I-sorbite enobushushu yimveliso yeqondo lobushushu eliphezulu, kwaye uxinzelelo lokuphumla koxinzelelo lusezantsi kancinci kunaleyo yethostostite enobushushu. I-sorbite enobulali sisakhiwo esenziwe nge-polygonal ferrite kunye ne-cementite ye-granular. Amandla ayo aphakamileyo, kodwa ngenxa yeplastikhi ephezulu kunye nobulukhuni, ukumelana kwayo nokushiyeka kweplastiki kubuthathaka.

Imartensite enobushushu yimveliso enobushushu obusezantsi, kwaye ukuxhathisa kwayo ukuphumla koxinzelelo yeyona nto imbi. Esona sizathu siphambili kukuba i-martensite enobushushu sisisombululo esomeleleyo sekhabhoni kwi-ferrite. Nangona amandla kunye nobulukhuni buphezulu, iyabukeka, ayizinzanga kwaye ihambelana notshintsho kulwakhiwo, okukhokelela kukunganyangeki koxinzelelo.

Ngokusekwe kolu hlalutyo lungentla, i-troostite enobulali ineempawu zesakhiwo esizinzileyo kunye nokuthelekisa ngokufanelekileyo iipropathi zoomatshini ezahlukeneyo, ukuze intsimbi ikwazi ukuxhathisa ukuphumla koxinzelelo.