鎳元素對不銹鋼組織和性能的影響
鎳(nie)是不(bu)(bu)(bu)銹鋼(gang)(gang)(gang)中(zhong)(zhong)僅(jin)次于鉻(ge)(ge)的重(zhong)要合金元素。為了耐(nai)(nai)還原性(xing)(xing)(xing)酸和堿介質(zhi)的腐蝕,鋼(gang)(gang)(gang)中(zhong)(zhong)僅(jin)含鉻(ge)(ge)是不(bu)(bu)(bu)夠的,必須(xu)向鋼(gang)(gang)(gang)中(zhong)(zhong)加(jia)入鎳(nie)(見(jian)圖2.9和圖2.10)。鎳(nie)可促(cu)進不(bu)(bu)(bu)銹鋼(gang)(gang)(gang)鈍(dun)化膜(mo)的穩(wen)定(ding)性(xing)(xing)(xing),提(ti)高(gao)不(bu)(bu)(bu)銹鋼(gang)(gang)(gang)的熱力學穩(wen)定(ding)性(xing)(xing)(xing)。因此,不(bu)(bu)(bu)銹鋼(gang)(gang)(gang)中(zhong)(zhong)鉻(ge)(ge)與鎳(nie)共存,可顯(xian)著強化不(bu)(bu)(bu)銹鋼(gang)(gang)(gang)的不(bu)(bu)(bu)銹性(xing)(xing)(xing)和耐(nai)(nai)蝕性(xing)(xing)(xing)。鎳(nie)對不(bu)(bu)(bu)銹鋼(gang)(gang)(gang)的高(gao)溫抗氧...