沉(chen)(chen)淀(dian)(dian)(dian)(dian)硬(ying)化(hua)(hua)(hua)不銹鋼(gang)是(shi)一(yi)類(lei)(lei)含沉(chen)(chen)淀(dian)(dian)(dian)(dian)硬(ying)化(hua)(hua)(hua)元素(su)(Cu、Al、Ti、Nb)的(de)鐵(tie)鉻鎳合金,可以通過熱處(chu)理強(qiang)化(hua)(hua)(hua),此類(lei)(lei)鋼(gang)具有高(gao)強(qiang)度、足夠的(de)韌性和適(shi)宜(yi)的(de)耐蝕性。主(zhu)要(yao)應用于宇航工業(ye)和一(yi)些高(gao)技術產(chan)業(ye)。 沉(chen)(chen)淀(dian)(dian)(dian)(dian)硬(ying)化(hua)(hua)(hua)不銹鋼(gang)可區(qu)分為馬(ma)氏(shi)體(ti)(ti)、半奧氏(shi)體(ti)(ti)和奧氏(shi)體(ti)(ti)沉(chen)(chen)淀(dian)(dian)(dian)(dian)硬(ying)化(hua)(hua)(hua)不銹鋼(gang)三(san)種主(zhu)要(yao)類(lei)(lei)型,近年來又出現了鐵(tie)素(su)體(ti)(ti)沉(chen)(chen)淀(dian)(dian)(dian)(dian)硬(ying)化(hua)(hua)(hua)不銹鋼(gang)。在馬(ma)氏(shi)體(ti)(ti)沉(chen)(chen)淀(dian)(dian)(dian)(dian)不銹鋼(gang)中,基于馬(ma)氏(shi)體(ti)(ti)時效(xiao)鋼(gang)的(de)經驗,近年來出現了馬(ma)氏(shi)體(ti)(ti)時效(xiao)不銹鋼(gang),與前者比較,后者碳含量較低(di),其強(qiang)化(hua)(hua)(hua)手段(duan)主(zhu)要(yao)是(shi)靠(kao)金屬間(jian)化(hua)(hua)(hua)合物析出,且熱處(chu)理簡單。