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雙相不鏽鋼與奧氏體以及鐵素體不鏽鋼的比較

日期:2025-04-04 19:33
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摘要:<p align="left" style="margin:0pt;"> <span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><span style="font-family:宋體;">雙相不鏽鋼與奧氏體以及鐵素體不鏽鋼的比較</span></span> </p> <p align="left" style="margin:0pt;"> <span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><span style="font-family:宋體;">所謂雙相不鏽鋼是在其固淬組織中鐵素體相與奧氏體相各占一半,一般*少相的含量也許要達(dá)到</span>30%<span style="font-family:宋體;">。</span><span style="font-family:Calibri;">&nbsp;</span></span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><br /> </span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span style="font-family:宋體;">由於兩相組織的特點(diǎn),通過正確控製化學(xué)成分和熱處理工藝,使</span><span style="font-family:Calibri;">DSS</span><span style="font-family:宋體;">兼有鐵素體不鏽鋼和奧氏體不鏽鋼的優(yōu)點(diǎn)。</span></span> </p> <p align="left" style="margin:0pt;"> <span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;">&nbsp; &nbsp; &nbsp; &nbsp;<span style="font-family:宋體;">與奧氏體不鏽鋼相比,雙相不鏽鋼的優(yōu)勢如下:</span></span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><br /> </span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><br /> </span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;">&nbsp; &nbsp; <span style="font-family:宋體;">(</span><span style="font-family:Calibri;">1</span><span style="font-family:宋體;">)屈服強(qiáng)度比普通奧氏體不鏽鋼高一倍多,且具有成型需要的足夠的塑韌性。采用雙相不鏽鋼製造儲(chǔ)罐或壓力容器的壁厚要比常用的奧氏體減少</span><span style="font-family:Calibri;">30-50%</span><span style="font-family:宋體;">,有利於降低成本。</span><span style="font-family:Calibri;">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;</span></span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><br /> </span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;">&nbsp; &nbsp; <span style="font-family:宋體;">(</span><span style="font-family:Calibri;">2</span><span style="font-family:宋體;">)具有優(yōu)異的耐應(yīng)力腐蝕破裂的能力,即使是含合金量*低的雙相不鏽鋼也有比奧氏體不鏽鋼更高的耐應(yīng)力腐蝕破裂的能力,尤其在含氯離子的環(huán)境中。應(yīng)力腐蝕是普通奧氏體不鏽鋼難以解決的突出問題。</span></span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><br /> </span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;">&nbsp; &nbsp; &nbsp;<span style="font-family:宋體;">(</span><span style="font-family:Calibri;">3</span><span style="font-family:宋體;">)在許多介質(zhì)中應(yīng)用*普遍的</span><span style="font-family:Calibri;">2205</span><span style="font-family:宋體;">雙相不鏽鋼的耐腐蝕性優(yōu)於普通的</span><span style="font-family:Calibri;">&nbsp;</span></span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><br /> </span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;">&nbsp; &nbsp; &nbsp; 316L<span style="font-family:宋體;">奧氏體不鏽鋼,而超級雙相不鏽鋼具有極高的耐腐蝕性,再一些介質(zhì)中,如醋酸,甲酸等甚至可以取代高合金奧氏體不鏽鋼,乃至耐蝕合金。</span></span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><br /> </span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;">&nbsp; &nbsp; &nbsp;<span style="font-family:宋體;">(</span><span style="font-family:Calibri;">4</span><span style="font-family:宋體;">)具有良好的耐局部腐蝕性能,與合金含量相當(dāng)?shù)膴W氏體不鏽鋼相比,它的耐磨損腐蝕和疲勞腐蝕性能都優(yōu)於奧氏體不鏽鋼。</span></span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><br /> </span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;">&nbsp; &nbsp; <span style="font-family:宋體;">(</span><span style="font-family:Calibri;">5</span><span style="font-family:宋體;">)比奧氏體不鏽鋼的線膨脹係數(shù)低,和碳鋼接近,適合與碳鋼連接,具有重要的工程意義,如生產(chǎn)複合板或襯裡等。</span><span style="font-family:Calibri;">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;</span></span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><br /> </span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;">&nbsp; &nbsp; &nbsp;<span style="font-family:宋體;">(</span><span style="font-family:Calibri;">6</span><span style="font-family:宋體;">)不論在動(dòng)載或靜載條件下,比奧氏體不鏽鋼具有更高的能量吸收能力,這對結(jié)構(gòu)件應(yīng)付突發(fā)事故如衝撞,爆炸等,雙相不鏽鋼優(yōu)勢明顯,有實(shí)際應(yīng)用價(jià)值。</span></span> </p> <p align="left" style="margin:0pt;"> <span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><br /> </span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;">&nbsp; &nbsp; &nbsp;<span style="font-family:宋體;">與奧氏體不鏽鋼相比,雙相不鏽鋼的弱勢如下:</span></span> </p> <p align="left" style="margin:0pt;"> <span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;">&nbsp; &nbsp; &nbsp;<span style="font-family:宋體;">(</span><span style="font-family:Calibri;">1</span><span style="font-family:宋體;">)應(yīng)用的普遍性與多麵性不如奧氏體不鏽鋼,例如其使用溫度必須控製在</span><span style="font-family:Calibri;">250</span><span style="font-family:宋體;">攝氏度以下。</span></span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><br /> </span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;">&nbsp; &nbsp; &nbsp; <span style="font-family:宋體;">(</span><span style="font-family:Calibri;">2</span><span style="font-family:宋體;">)其塑韌性較奧氏體不鏽鋼低,冷,熱加工工藝和成型性能不如奧氏體不鏽鋼。</span></span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><br /> </span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;">&nbsp; &nbsp; &nbsp; <span style="font-family:宋體;">(</span><span style="font-family:Calibri;">3</span><span style="font-family:宋體;">)存在中溫脆性區(qū),需要嚴(yán)格控製熱處理和焊接的工藝製度,以避免有害相的出現(xiàn),損害性能。</span></span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><br /> </span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;">&nbsp; &nbsp; &nbsp; <span style="font-family:宋體;">與鐵素體不鏽鋼相比,雙相不鏽鋼的優(yōu)勢如下:</span></span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><br /> </span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><span style="font-family:宋體;">(</span><span style="font-family:Calibri;">1</span><span style="font-family:宋體;">)綜合力學(xué)性能比鐵素體不鏽鋼好,尤其是塑韌性,不象鐵素體不鏽鋼那樣對脆性敏感。</span></span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><br /> </span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><span style="font-family:宋體;">(</span><span style="font-family:Calibri;">2</span><span style="font-family:宋體;">)除耐應(yīng)力腐蝕性能外,其他耐局部腐蝕性能都優(yōu)於鐵素體不鏽鋼。</span></span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><br /> </span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;">&nbsp;<span style="font-family:宋體;">(</span><span style="font-family:Calibri;">3</span><span style="font-family:宋體;">)冷加工工藝性能和冷成型性能遠(yuǎn)優(yōu)於鐵素體不鏽鋼。</span></span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><br /> </span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;">&nbsp;<span style="font-family:宋體;">(</span><span style="font-family:Calibri;">4</span><span style="font-family:宋體;">)焊接性能也遠(yuǎn)優(yōu)於鐵素體不鏽鋼,一般焊前不需預(yù)熱,焊後不需熱處理。</span></span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><br /> </span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><span style="font-family:宋體;">(</span><span style="font-family:Calibri;">5</span><span style="font-family:宋體;">)應(yīng)用範(fàn)圍較鐵素體不鏽鋼寬。</span></span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><br /> </span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><span style="font-family:宋體;">與鐵素體不鏽鋼相比,雙相不鏽鋼的弱勢如下:</span></span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><br /> </span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><span style="font-family:宋體;">合金元素含量高,價(jià)格相對高,一般鐵素體不含鎳。</span></span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><br /> </span><span style="font-family:宋體;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;"><span style="font-family:宋體;">綜上所述,可以概括地看出</span><span style="font-family:Calibri;">DSS</span><span style="font-family:宋體;">的使用性能和工藝性能的概貌,它以其優(yōu)越的力學(xué)與耐腐蝕綜合性能贏得了使用者的青睞,已成為既節(jié)省重量又節(jié)省投資的優(yōu)良的耐蝕工程材料。</span></span> </p>

雙相不鏽鋼與奧氏體以及鐵素體不鏽鋼的比較

所謂雙相不鏽鋼是在其固淬組織中鐵素體相與奧氏體相各占一半,一般*少相的含量也許要達(dá)到30% 
        由於兩相組織的特點(diǎn),通過正確控製化學(xué)成分和熱處理工藝,使DSS兼有鐵素體不鏽鋼和奧氏體不鏽鋼的優(yōu)點(diǎn)。

       與奧氏體不鏽鋼相比,雙相不鏽鋼的優(yōu)勢如下:
                      
    1)屈服強(qiáng)度比普通奧氏體不鏽鋼高一倍多,且具有成型需要的足夠的塑韌性。采用雙相不鏽鋼製造儲(chǔ)罐或壓力容器的壁厚要比常用的奧氏體減少30-50%,有利於降低成本。                
    2)具有優(yōu)異的耐應(yīng)力腐蝕破裂的能力,即使是含合金量*低的雙相不鏽鋼也有比奧氏體不鏽鋼更高的耐應(yīng)力腐蝕破裂的能力,尤其在含氯離子的環(huán)境中。應(yīng)力腐蝕是普通奧氏體不鏽鋼難以解決的突出問題。
     3)在許多介質(zhì)中應(yīng)用*普遍的2205雙相不鏽鋼的耐腐蝕性優(yōu)於普通的 
      316L奧氏體不鏽鋼,而超級雙相不鏽鋼具有極高的耐腐蝕性,再一些介質(zhì)中,如醋酸,甲酸等甚至可以取代高合金奧氏體不鏽鋼,乃至耐蝕合金。
     4)具有良好的耐局部腐蝕性能,與合金含量相當(dāng)?shù)膴W氏體不鏽鋼相比,它的耐磨損腐蝕和疲勞腐蝕性能都優(yōu)於奧氏體不鏽鋼。
    5)比奧氏體不鏽鋼的線膨脹係數(shù)低,和碳鋼接近,適合與碳鋼連接,具有重要的工程意義,如生產(chǎn)複合板或襯裡等。                   
     6)不論在動(dòng)載或靜載條件下,比奧氏體不鏽鋼具有更高的能量吸收能力,這對結(jié)構(gòu)件應(yīng)付突發(fā)事故如衝撞,爆炸等,雙相不鏽鋼優(yōu)勢明顯,有實(shí)際應(yīng)用價(jià)值。


     與奧氏體不鏽鋼相比,雙相不鏽鋼的弱勢如下:

     1)應(yīng)用的普遍性與多麵性不如奧氏體不鏽鋼,例如其使用溫度必須控製在250攝氏度以下。
      2)其塑韌性較奧氏體不鏽鋼低,冷,熱加工工藝和成型性能不如奧氏體不鏽鋼。
      3)存在中溫脆性區(qū),需要嚴(yán)格控製熱處理和焊接的工藝製度,以避免有害相的出現(xiàn),損害性能。
      與鐵素體不鏽鋼相比,雙相不鏽鋼的優(yōu)勢如下:
1)綜合力學(xué)性能比鐵素體不鏽鋼好,尤其是塑韌性,不象鐵素體不鏽鋼那樣對脆性敏感。
2)除耐應(yīng)力腐蝕性能外,其他耐局部腐蝕性能都優(yōu)於鐵素體不鏽鋼。
 3)冷加工工藝性能和冷成型性能遠(yuǎn)優(yōu)於鐵素體不鏽鋼。
 4)焊接性能也遠(yuǎn)優(yōu)於鐵素體不鏽鋼,一般焊前不需預(yù)熱,焊後不需熱處理。
5)應(yīng)用範(fàn)圍較鐵素體不鏽鋼寬。
與鐵素體不鏽鋼相比,雙相不鏽鋼的弱勢如下:
合金元素含量高,價(jià)格相對高,一般鐵素體不含鎳。
綜上所述,可以概括地看出DSS的使用性能和工藝性能的概貌,它以其優(yōu)越的力學(xué)與耐腐蝕綜合性能贏得了使用者的青睞,已成為既節(jié)省重量又節(jié)省投資的優(yōu)良的耐蝕工程材料。

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