Umgangatho ophezulu, umhlaba ogcweleyo wentsimbi yesantya esiphezulu udla ngokuvela kumhlophe.Ewe, amasuntswana e-rolled drill anokuba mhlophe ngokucolwa kakuhle kwesangqa sangaphandle.Isizathu sokuba umgangatho ophezulu kukuba ukongeza kwizinto eziphathekayo ngokwazo, ulawulo lomgangatho ngexesha lenkqubo yokusila nalo lungqongqo kakhulu, akuyi kubakho ukutshisa phezu kwesixhobo.Umnyama yintwana ye-drill eye yafakwa nitrided.
Yindlela yekhemikhali ebeka isixhobo esigqityiweyo kumxube we-ammonia kunye nomphunga wamanzi kwaye siwutshise kwi-540 ~ 560 ° C ukuphucula ukuqina kwesixhobo.Okwangoku, ininzi ye-black drill bits kwimarike emnyama kuphela. ngombala (ukwenzela ukugubungela ukutshisa okanye ulusu olumnyama ebusweni besixhobo), kodwa umphumo wangempela wokusetyenziswa awuzange uphuculwe ngokufanelekileyo.
Kukho iinkqubo ezintathu zokuvelisa i-drill bits, i-black is rolling, eyona nto imbi kakhulu.Ezimhlophe zichetyiwe kwaye zikhazimlisiwe.Ngenxa yokuba ayivelisi i-oxidation ephezulu yokushisa, ngokungafani nokuqengqeleka, ukwakhiwa kweenkozo zentsimbi ayonakaliswa.Isetyenziselwa ukugrumba izixhobo zokusebenza ngobulukhuni obungaphezulu kancinci.I-drill etyheli-brown ibizwa ngokuba yi-cobalt-containing drill kushishino.Lo ngumgaqo ongachazwanga wolu shishino lwe-drill.Iidayimani ezineCobalt zimhlophe ekuqaleni kwaye ziveliswa ngokusila.Xa zithe zafakwa kwiatom kwixesha lamva, ziba mdaka butyheli (ngokuqhelekileyo zibizwa ngokuba yiamber), eyona nto isetyenziswayo ngoku.I-M35 (Co 5%) nayo inombala wegolide.
Olu hlobo lwe-drill lubizwa ngokuba yi-titanium-plated drill, eyahlulahlulwe ibe yi-decorative plating kunye ne-industrial plating.I-decorative plating ayinayo nayiphi na impembelelo, inhle kwaye igolide.I-industrial plating ilungile kakhulu, ubunzima bunokufikelela kwi-HRC78, engaphezulu kunobulukhuni bedayimani ezine-cobalt (HRC54).
Ixesha lokuposa: Dec-17-2021
