2507不銹鋼無縫管的化學成分及性能特點

摘要：<p class="MsoNormal"> <span style="font-family:Calibri;">2507</span><span style="font-family:宋體;">不銹鋼無縫管的化學成分及性能特點</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:Calibri;">2507</span><span style="font-family:宋體;">不銹鋼無縫管是一種鐵素體</span><span style="font-family:Calibri;">-</span><span style="font-family:宋體;">奧氏體</span><span style="font-family:Calibri;">(</span><span style="font-family:宋體;">雙相</span><span style="font-family:Calibri;">)</span><span style="font-family:宋體;">不銹鋼化學成分（</span><span style="font-family:Calibri;">25Cr-7Ni-4Mo-0.27N</span><span style="font-family:宋體;">）</span><span style="font-family:Calibri;">2507 Stainless steel</span><span style="font-family:宋體;">，具有極好的抗點腐蝕</span><span style="font-family:Calibri;">,</span><span style="font-family:宋體;">縫隙腐蝕和均勻腐蝕的能力。</span><span style="font-family:Calibri;">2507</span><span style="font-family:宋體;">不銹鋼無縫管</span><span style="font-family:宋體;">是一種鐵素體</span><span style="font-family:Calibri;">-</span><span style="font-family:宋體;">奧氏體</span><span style="font-family:Calibri;">(</span><span style="font-family:宋體;">雙相</span><span style="font-family:Calibri;">)</span><span style="font-family:宋體;">不銹鋼，它綜合了許多鐵素體鋼和奧氏體鋼*有益的性能</span><span style="font-family:Calibri;">, </span><span style="font-family:宋體;">由于該鋼鉻和鉬的含量都很高</span><span style="font-family:Calibri;">,</span><span style="font-family:宋體;">因此具有極好的抗點腐蝕，縫隙腐蝕和均勻腐蝕的能力。雙相顯微組織保證了該鋼具有很高的抗應力腐蝕破裂的能力，而且機械強度也很高。</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:Calibri;">2507</span><span style="font-family:宋體;">不銹鋼無縫管的主要用途：</span><span style="font-family:Calibri;">2507</span><span style="font-family:宋體;">不銹鋼應用于石油和天然氣工業(yè)；海上石破天油平臺</span><span style="font-family:Calibri;">(</span><span style="font-family:宋體;">熱交換器管，水處理和供水系統(tǒng)，消防系統(tǒng)</span><span style="font-family:Calibri;">,</span><span style="font-family:宋體;">噴水系統(tǒng)，穩(wěn)水系統(tǒng)；石油化工設備；脫鹽</span><span style="font-family:Calibri;">(</span><span style="font-family:宋體;">淡化</span><span style="font-family:Calibri;">)</span><span style="font-family:宋體;">設備</span><span style="font-family:Calibri;">(</span><span style="font-family:宋體;">和設備中的高壓管，海水管</span><span style="font-family:Calibri;">)</span><span style="font-family:宋體;">；既需要高強度同時又需要高耐腐蝕性的機械和結構部件；燃</span><span style="font-family:Calibri;">(</span><span style="font-family:宋體;">廢</span><span style="font-family:Calibri;">)</span><span style="font-family:宋體;">氣凈化設備。</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:Calibri;">2507</span><span style="font-family:宋體;">不銹鋼無縫管主要成分</span><span style="font-family:Calibri;">:25Cr-7Ni-4Mo-0.27N</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:Calibri;">2507</span><span style="font-family:宋體;">不銹鋼無縫管各國標準對照</span><span style="font-family:Calibri;">:</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:Calibri;">ASTM/ASME:&nbsp; A240 - UNS S32750</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:Calibri;">EURONORM:&nbsp; 1.4410 - X2 Cr Ni MoN 25.7.4</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:Calibri;">AFNOR: Z3 CN 25.06 Az</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:Calibri;">DIN/EN</span><span style="font-family:宋體;">： </span><span style="font-family:Calibri;">1.4410</span><span style="font-family:宋體;">、</span><span style="font-family:Calibri;">ASME SA-240</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:Calibri;">GB:&nbsp; 25Cr-7Ni-4Mo-0.27N</span><o:p></o:p> </p> <p class="MsoNormal"> 抗腐蝕能力<o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:Calibri;">1.</span><span style="font-family:宋體;">一般腐蝕：</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:Calibri;">SAF 2507</span><span style="font-family:宋體;">的較高的鉻及鉬含量使其對有機酸如甲酸、乙酸等具有較強的抗整體腐蝕的能力。</span><span style="font-family:Calibri;">SAF2507</span><span style="font-family:宋體;">合合金對無機酸，尤其是那些包含氯化物的無機酸也具有較強的抗腐蝕能力。</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:宋體;">和</span><span style="font-family:Calibri;">904L</span><span style="font-family:宋體;">相比，</span><span style="font-family:Calibri;">SAF2507</span><span style="font-family:宋體;">對稀釋的混有氯根離子的硫酸具有更強的抗腐蝕能力。</span><span style="font-family:Calibri;">904L</span><span style="font-family:宋體;">是奧氏體狀態(tài)的合金，專用于抗純硫酸腐蝕。</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:Calibri;">316L</span><span style="font-family:宋體;">等級不能用于鹽酸環(huán)境中，它可能會遭到局部腐蝕或整體腐蝕。</span><span style="font-family:Calibri;">SAF2507</span><span style="font-family:宋體;">可以用于稀釋的鹽酸環(huán)境里，具有較強的抗斑損及抗裂隙腐蝕的能力。</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:Calibri;">2.</span><span style="font-family:宋體;">晶間腐蝕：</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:Calibri;">nSAF 2507</span><span style="font-family:宋體;">較低的碳含量大大地降低了在熱處理時晶間中的碳化物沉淀的風險</span><span style="font-family:Calibri;">,</span><span style="font-family:宋體;">因此</span><span style="font-family:Calibri;">,</span><span style="font-family:宋體;">這個合金具有很強的抵抗與碳化物相關的晶間腐蝕的能力</span><span style="font-family:Calibri;">.</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:Calibri;">3.</span><span style="font-family:宋體;">應力腐蝕開裂：</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:Calibri;">SAF 2507</span><span style="font-family:宋體;">的復式結構使其具有較強的抗應力腐蝕開裂的能力。由于其較高的合金含量</span><span style="font-family:Calibri;">,SAF 2507</span><span style="font-family:宋體;">的抗腐蝕能力及強度均優(yōu)于</span><span style="font-family:Calibri;">2205.</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:宋體;">裂縫在建筑等方面幾乎是不可避免的</span><span style="font-family:Calibri;">,</span><span style="font-family:宋體;">這使得不銹鋼在氯化物的環(huán)境里更易受到腐蝕</span><span style="font-family:Calibri;">.SAF 2507 </span><span style="font-family:宋體;">具有很強的抗裂縫腐蝕的能力</span><span style="font-family:Calibri;">.SAF 2507</span><span style="font-family:宋體;">在含有</span><span style="font-family:Calibri;">2000ppm</span><span style="font-family:宋體;">氯離子的硫酸中的等腐蝕曲線</span><span style="font-family:Calibri;">0.1 mm/year;</span><span style="font-family:宋體;">在鹽酸中的等腐蝕曲線</span><span style="font-family:Calibri;">0.1 mm/year.</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:宋體;">機械特性</span><span style="font-family:Calibri;">:SAF 2507</span><span style="font-family:宋體;">具有很高的耐壓強度、沖擊強度及較低的熱膨脹系數和較高的導熱性</span><span style="font-family:Calibri;">.</span><span style="font-family:宋體;">這些特性適用于很多結構零件及機械部件</span><span style="font-family:Calibri;">.SAF 2507</span><span style="font-family:宋體;">沖擊強度很高</span><span style="font-family:Calibri;">,</span><span style="font-family:宋體;">不宜長期置于高于</span><span style="font-family:Calibri;">570</span><span style="font-family:宋體;">°</span><span style="font-family:Calibri;">F</span><span style="font-family:宋體;">的溫度環(huán)境下</span><span style="font-family:Calibri;">,</span><span style="font-family:宋體;">這樣可能會減弱其韌性</span><span style="font-family:Calibri;">.</span><span style="font-family:宋體;">抗拉強度</span><span style="font-family:Calibri;">:</span><span style="font-family:宋體;">σ</span><span style="font-family:Calibri;">b</span><span style="font-family:宋體;">≥</span><span style="font-family:Calibri;">730Mpa;</span><span style="font-family:宋體;">延伸率</span><span style="font-family:Calibri;">:</span><span style="font-family:宋體;">δ≥</span><span style="font-family:Calibri;">20%</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:宋體;">配套焊材</span><span style="font-family:Calibri;">:ER2594</span><span style="font-family:宋體;">焊絲，</span><span style="font-family:Calibri;">E2594</span><span style="font-family:宋體;">焊條</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:宋體;">應用領域</span><span style="font-family:Calibri;">:</span><span style="font-family:宋體;">紙漿和造紙工業(yè)，海水淡化，煙氣凈化，熱交換器，化學品液貨船管道系統(tǒng)，海水系統(tǒng)等。</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:Calibri;">2507</span><span style="font-family:宋體;">不銹鋼主要規(guī)格：</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:Calibri;">2507</span><span style="font-family:宋體;">不銹鋼板材現貨規(guī)格</span><span style="font-family:Calibri;">:0.3mm-350mm(</span><span style="font-family:宋體;">厚度</span><span style="font-family:Calibri;">)</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:Calibri;">2507</span><span style="font-family:宋體;">不銹鋼棒材現貨規(guī)格</span><span style="font-family:Calibri;">:3.0mm-500mm(</span><span style="font-family:宋體;">直徑</span><span style="font-family:Calibri;">)</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:Calibri;">2507</span><span style="font-family:宋體;">不銹鋼線材現貨規(guī)格</span><span style="font-family:Calibri;">:0.1mm-20mm(</span><span style="font-family:宋體;">線徑</span><span style="font-family:Calibri;">)</span><o:p></o:p> </p> <p class="MsoNormal"> &nbsp; </p> <p class="MsoNormal"> <span style="font-family:Calibri;">2507</span><span style="font-family:宋體;">不銹鋼的化學成分</span><span style="font-family:Calibri;">:</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:Calibri;">C</span><span style="font-family:宋體;">≤</span><span style="font-family:Calibri;">0.03 </span><span style="font-family:宋體;">、</span><span style="font-family:Calibri;">Si</span><span style="font-family:宋體;">≤</span><span style="font-family:Calibri;">0.80 </span><span style="font-family:宋體;">、</span><span style="font-family:Calibri;">Mn</span><span style="font-family:宋體;">≤</span><span style="font-family:Calibri;">1.2 </span><span style="font-family:宋體;">、</span><span style="font-family:Calibri;">Cr:24-26 </span><span style="font-family:宋體;">、</span><span style="font-family:Calibri;">Ni:6-8 </span><span style="font-family:宋體;">、</span><span style="font-family:Calibri;">S</span><span style="font-family:宋體;">≤</span><span style="font-family:Calibri;">0.02 </span><span style="font-family:宋體;">、</span><span style="font-family:Calibri;">P</span><span style="font-family:宋體;">≤</span><span style="font-family:Calibri;">0.035 </span><span style="font-family:宋體;">、</span><span style="font-family:Calibri;">Mo:3-5 </span><span style="font-family:宋體;">、</span><span style="font-family:Calibri;">N:0.24-0.32</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:Calibri;">2507</span><span style="font-family:宋體;">不銹鋼無縫管在適宜固溶處理后，此鋼的顯微組織有比較理想的α</span><span style="font-family:Calibri;">/</span><span style="font-family:宋體;">γ之比約為</span><span style="font-family:Calibri;">50/50</span><span style="font-family:宋體;">的雙相結構。當固溶溫度在</span><span style="font-family:Calibri;">1050</span><span style="font-family:宋體;">℃以上時，隨溫度升高，鋼中鐵素體相數量會有所增加，但由于含氮量高，在</span><span style="font-family:Calibri;">1300</span><span style="font-family:宋體;">℃以下剛的相比例不會有顯著改變。此鋼若不經不同溫度時效</span><span style="font-family:Calibri;">(</span><span style="font-family:宋體;">或受熱的影響</span><span style="font-family:Calibri;">)</span><span style="font-family:宋體;">，在α</span><span style="font-family:Calibri;">+</span><span style="font-family:宋體;">γ基體上會有γ</span><span style="font-family:Calibri;">2</span><span style="font-family:宋體;">形成和δ、χ、</span><span style="font-family:Calibri;">R</span><span style="font-family:宋體;">、α</span><span style="font-family:Calibri;">`</span><span style="font-family:宋體;">金屬間相和</span><span style="font-family:Calibri;">Cr2N</span><span style="font-family:宋體;">等氧化物析出，由于鋼中的碳含量低</span><span style="font-family:Calibri;">(</span><span style="font-family:宋體;">一般在</span><span style="font-family:Calibri;">0.01%-0.02%)</span><span style="font-family:宋體;">，因此鋼中一般沒有碳化物存在。</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:Calibri;">2507</span><span style="font-family:宋體;">不銹鋼無縫管產品的力學性能</span><span style="font-family:Calibri;">:</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:宋體;">一、</span><span style="font-family:Calibri;">2507</span><span style="font-family:宋體;">不銹鋼無縫管的室溫力學性能</span><span style="font-family:Calibri;">:</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:宋體;">鋼材品種</span><span style="font-family:Calibri;">:&nbsp; &nbsp;</span><span style="font-family:宋體;">壁厚≤</span><span style="font-family:Calibri;">20mm ;</span><span style="font-family:宋體;">δ</span><span style="font-family:Calibri;">b/MPa:800-1000 </span><span style="font-family:宋體;">、δ</span><span style="font-family:Calibri;">0.2/MPa:</span><span style="font-family:宋體;">≥</span><span style="font-family:Calibri;">550 </span><span style="font-family:宋體;">、δ</span><span style="font-family:Calibri;">5/%:</span><span style="font-family:宋體;">≥</span><span style="font-family:Calibri;">25 </span><span style="font-family:宋體;">、硬度</span><span style="font-family:Calibri;">(HV):290</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:宋體;">二、</span><span style="font-family:Calibri;">2507</span><span style="font-family:宋體;">雙相不銹鋼板在室溫</span><span style="font-family:Calibri;">--200</span><span style="font-family:宋體;">℃的力學性能</span><span style="font-family:Calibri;">:</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:宋體;">鋼材品種</span> 溫度<span style="font-family:Calibri;">/</span><span style="font-family:宋體;">℃ δ</span><span style="font-family:Calibri;">b/MPa</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:宋體;">室溫</span> ≥<span style="font-family:Calibri;">530</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:宋體;">板材</span> <span style="font-family:Calibri;">100 </span><span style="font-family:宋體;">≥</span><span style="font-family:Calibri;">450</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:Calibri;">200 </span><span style="font-family:宋體;">≥</span><span style="font-family:Calibri;">400</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:宋體;">三、</span><span style="font-family:Calibri;">2507</span><span style="font-family:宋體;">大口徑無縫管的力學性能</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:宋體;">外徑</span>×壁厚 δ<span style="font-family:Calibri;">b/MPa </span><span style="font-family:宋體;">δ</span><span style="font-family:Calibri;">0.2/MPa </span><span style="font-family:宋體;">δ</span><span style="font-family:Calibri;">5/% </span><span style="font-family:宋體;">硬度</span><span style="font-family:Calibri;">(HV)</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:Calibri;">273.0mm</span><span style="font-family:宋體;">×</span><span style="font-family:Calibri;">4.19mm 894 644 40 284</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:Calibri;">323.9mm</span><span style="font-family:宋體;">×</span><span style="font-family:Calibri;">4.57mm 858 662 45 270</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:Calibri;">406.4mm</span><span style="font-family:宋體;">×</span><span style="font-family:Calibri;">4.74mm 854 657 41 272</span><o:p></o:p> </p>