Ua hoʻohuiʻia nā mea i hoʻohuiʻia i nā kila kīwī manuahi e hoʻopili ai i ka S, PB, CA a me P.ʻO kā lākou mau hana nui:
1.ʻO ka hana o ka sulfur
Sulfur nāʻano mns i nā mea e pili ana iā MN i ka kila, hiki ke hoʻopau i ka hoʻomauʻana o ka matrix, e hōʻemi i nā pahu ma waena o nā pahu a me ka hāmeʻa. Hiki i ke Sulfur ke hōʻemi i ka friction a pale i nā pōpoki mai ka hoʻopiliʻana i ka kihiʻoki. Eia nō naʻe, hiki i ke alo o ka sulfur ke hana i ke kila wela a me nā brittle, no laila e hoʻonuiʻia kaʻike sulfur.
2.ʻO ka hana o ke alakaʻi
Hiki i ka hoʻohui o PB ke hoʻomaikaʻi i ka hanaʻokiʻana o ke kila. Mai ka pbʻaʻole i hoʻokaʻawale i ka ferrite i ke kila aʻaʻole i hana i nā mea hoʻohui, aia ma kahi kūlana manuahi (2 ~ 3μm) I ka wā e hānau ai ka wela i ka wā o keʻokiʻokiʻana i keʻano o ka papa o ka PB, a lilo i ka papa hana ʻO ka nui o ka PB i hoʻohuiʻia ma keʻano o W (PB) = 0.1% ~ 0.35%.
3.ʻO ka hana o ka calcium
Ca hiki ke hana i ka ca a al silitate incusions i ke kila, kahi e pili ana i ka fily ʻO ka nui o ka faile i hoʻohuiʻia he w (ca) = 0.001% ~ 0.005%.
4.ʻO ka hana o ka phosphorus
Ua hoʻohuiʻiaʻo P i ka sulfur-loaʻa i kahi kila manuahiʻole e hoʻokaʻawale iā Ferrite, e hoʻoikaika ai i ka hoʻoikaikaʻana i konaʻokiʻana. I mea e pale ai i ka "Green Brittleness", w (p) i kuhikuhiʻia e ≤0.15%.
Hiki i ka hoʻohuiʻia o kēia mau mea ke hoʻomaikaʻi i kaʻaha nui o ka hanaʻo ka hana a hoʻonui i ke ola lawelawe o ka pono.

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