⑴ Ukucima umphezulu:
Ngaba umphezulu wentsimbi ngokufudumeza ngokukhawuleza kwiqondo lobushushu elibalulekileyo ngasentla, kodwa ubushushu alizange libe nexesha lokusasazeka kumbindi ngaphambi kokupholisa ngokukhawuleza, ukwenzela ukuba umaleko womphezulu unokucinywa kwizicubu ze-martensitic, kwaye undoqo awuzange wenzeke ukuguqulwa kwesigaba, esiqonda ukuba umphezulu wokuqina kunye nondoqo awutshintshi. Ifanelekile kwintsimbi yekhabhoni ephakathi.

⑵ Unyango lobushushu beMichiza:
Ibhekisa kwiathom yekhemikhali, kunye nekhono lokusasazwa kweathomu kwiqondo lobushushu eliphezulu, ingene kumaleko angaphezulu kwendawo yokusebenza, ukuguqula ukwakheka kweekhemikhali kunye nesakhiwo somaleko ongaphezulu wesixhobo sokusebenzela, ukuze kuphunyezwe umaleko womphezulu wentsimbi kunye neemfuno ezithile zombutho kunye nokusebenza kwenkqubo yonyango lobushushu. Ngokweentlobo zezinto zokungeniswa, unyango lobushushu bekhemikhali lunokwahlulwa lube yi-carburizing, nitriding, cyanidation kunye nomthetho wokungena kwesinyithi.
Carburizing: Carburizing yinkqubo apho iiathom zekhabhoni zigqobhoza kumaleko ongaphezulu wentsimbi. Ngaba kwakhona ukwenza ephantsi carbon steel workpiece kunye umaleko carbon steel umphezulu ophezulu, kwaye emva koko ukucima kunye nobushushu eliphantsi tempering, ukuze umaleko umphezulu workpiece unobulukhuni eliphezulu kunye nokumelana banxibe, kwaye inxalenye ephakathi workpiece nangoku ukugcina ukuqina kunye neplastiki yentsimbi carbon ephantsi.
I-nitriding, okanye i-nitriding, yinkqubo apho umaleko wentsimbi ugqobhoza iiathom zenitrogen. Injongo kukuphucula ukuqina kunye nokuxhatshazwa kokugqoka komgangatho ophezulu kunye nokuphucula amandla okukhathala kunye nokumelana nokubola. Okwangoku, indlela yegesi ye-nitriding isetyenziswa kwimveliso.
I-Cyanidation, eyaziwa ngokuba yi-carbonitriding, kukungena ngaxeshanye kwekhabhoni kunye ne-athomu yenitrogen kwintsimbi. Yenza umphezulu wentsimbi ye-carburizing kunye neempawu ze-nitriding.
Ukungena kwesinyithi: kubhekiselele ekungeneni kweeathom zetsimbi kumgangatho ongaphezulu wentsimbi. Kukwenza umaleko womphezulu we-alloying yentsimbi, ukwenzela ukuba i-workpiece surface ibe nentsimbi ye-alloy, iimpawu ezikhethekileyo zentsimbi, ezifana nokumelana nobushushu, ukuxhathisa ukunxiba, ukumelana ne-oxidation, ukuxhathisa ukubola, njl.