Tauira 375 koura

Gold Ko anake te whakarewa i roto i te ao, he parakore kōwhai kanapa ataahua kahore tāpiritanga. koura Natural he umeraa pai, e te nui whakarei e te orooro. Tikanga, i whiwhi ai te koura e te faaohiparaa o putunga tūturu, ranei i haere i te tangohanga o te tahi atu konganuku i tokahuke. He Maori te koura tūturu nuinga e kore e parakore, kei reira rite poke matua o te parahi, me te hiriwa, me te atu tutaki maha atu āhuatanga. Na reira, ki te tirohanga ki tona koura e purea i raro ki te maimoatanga motuhake (kaitahi para) i runga i te mahinga koura.

kua hua te koura parakore 99.99% i roto i te puka o kaho, waea, konumohe, Unuhia me ētahi atu kai haratau. I roto i tenei puka ko reira tino ngohengohe me te kōngohe whakarewa, hei tauira i taea te unuhia kotahi karamu o te waea whakarewa ki te hawhe te roa o toru kiromita. Kei te whakamahia kētia te ahumahi whakapaipai mo te hanga o te whakapaipai koura i roto i ngā alloys. enei alloys katoa i te ihirangi koura etahi, ka rite ki taua e whakaritea e ratou ki te tauira. Ko te ihirangi raro o te konganuku utu nui, ko te 375 tauira koura.

E tito o 37.5 anake% koura parakore alloys o tenei tauira, ko te tahi atu wāhanga he parahi, me te hiriwa. ahumahi tohunga whakapaipai ētahi wā karanga reira te koura-parahi, me te hiriwa koranu. E ai ki ngā paerewa Russian e 5 momo o alloys ki tono nei te 375 tauira koura. enei alloys katoa te nuinga o memeha i te huru ambient, na tenei āhuatanga nui tauwhāiti ratou tono. Ko te whānuitanga katoa o ngā tae o enei alloys pae i kōwhai ki whero, engari maha hāngai te nuinga ki te koranu 585 pera-ka karanga "samovar" koura whero. Alloys he tae māwhero, ko te roa tino me te faingata'a, whakautu pai ratou ki te kai.

Ahakoa te meka e tenei tauira koura iti, kua whakamahia te reira i roto i te ahumahi whakapaipai. Tikanga, Kei te whakamahia enei alloys i te hanga o mowhiti marena. I roto i te Russian Federation reira he tauira kahore alloys paerewa raro, engari i roto i nga whenua Pākehā e whakamahia ana koura 333 tauira, e te whakamahia hoki ki te hanga whakapaipai me whakapaipai. alloys koura o ngā titonga nuitia whakamahia i roto i te ahumahi whakapaipai, rite ki ka tapiritia ki te tae rerekē e taea ki te whiwhi ngā alloys ariki: whero, māwhero, matomato ranei ara ma, me te te whānuitanga nui o ngā tae takawaenga.

E mea pinepine hoki te hanga o te whakapaipai whakamahia alloys, arā, o maha wāhanga. Ki te whiwhi tauira koura 375 te nuinga e tika ana ki te tua o te parahi, me te hiriwa koranu, e whakamahia ana hoki te tauira rite mālohi toe palladium, konukawata, konutea, cadmium me sēniti. taea ki te tapakuha, āhuatanga rerekē i ia wāhanga o te koranu ko. hanga hiriwa koranu koura atu kōngohe me māngohe, me mama. faarahi te tua o te parahi te pakeke o te koranu, engari tona resistance waikura i hōloa. Ano, riro he koranu taua he hue kanapa whero.

Addition o cadmium hanga koranu fusible me te maha whakamahia rite te koura-tūhoto. E horo'a te reira i te taua āhuatanga, me te konutea, i roto i te tua, e whakamarama ia te koranu, e hanga ana e ia taea ki te whakamahi i te reira i roto i te hanga o te koura ma. Ēnei konganuku utu pērā i konukawata me palladium-koura alloys whakawhiwhi plasticity, elasticity me nui mama ratou. I tua atu, hoatu ratou ratou ātete te waikura nui. Heoi, te koura 375 ki te tauira hua e te tāpiri i ēnei konganuku. He koura, he hiriwa me te parahi mo ia nga wae matua.