2507不锈钢无缝管的化學(xué)成分(fēn)及性能(néng)特点

摘要：<p class="MsoNormal"> <span style="font-family:Calibri;">2507</span><span style="font-family:宋體(tǐ);">不锈钢无缝管的化學(xué)成分(fēn)及性能(néng)特点</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:Calibri;">2507</span><span style="font-family:宋體(tǐ);">不锈钢无缝管是一种铁素體(tǐ)</span><span style="font-family:Calibri;">-</span><span style="font-family:宋體(tǐ);">奥氏體(tǐ)</span><span style="font-family:Calibri;">(</span><span style="font-family:宋體(tǐ);">双相</span><span style="font-family:Calibri;">)</span><span style="font-family:宋體(tǐ);">不锈钢化學(xué)成分(fēn)（</span><span style="font-family:Calibri;">25Cr-7Ni-4Mo-0.27N</span><span style="font-family:宋體(tǐ);">）</span><span style="font-family:Calibri;">2507 Stainless steel</span><span style="font-family:宋體(tǐ);">，具有(yǒu)极好的抗点腐蚀</span><span style="font-family:Calibri;">,</span><span style="font-family:宋體(tǐ);">缝隙腐蚀和均匀腐蚀的能(néng)力。</span><span style="font-family:Calibri;">2507</span><span style="font-family:宋體(tǐ);">不锈钢无缝管</span><span style="font-family:宋體(tǐ);">是一种铁素體(tǐ)</span><span style="font-family:Calibri;">-</span><span style="font-family:宋體(tǐ);">奥氏體(tǐ)</span><span style="font-family:Calibri;">(</span><span style="font-family:宋體(tǐ);">双相</span><span style="font-family:Calibri;">)</span><span style="font-family:宋體(tǐ);">不锈钢，它综合了许多(duō)铁素體(tǐ)钢和奥氏體(tǐ)钢*有(yǒu)益的性能(néng)</span><span style="font-family:Calibri;">, </span><span style="font-family:宋體(tǐ);">由于该钢铬和钼的含量都很(hěn)高</span><span style="font-family:Calibri;">,</span><span style="font-family:宋體(tǐ);">因此具有(yǒu)极好的抗点腐蚀，缝隙腐蚀和均匀腐蚀的能(néng)力。双相显微组织保证了该钢具有(yǒu)很(hěn)高的抗应力腐蚀破裂的能(néng)力，而且机械强度也很(hěn)高。</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:Calibri;">2507</span><span style="font-family:宋體(tǐ);">不锈钢无缝管的主要用(yòng)途：</span><span style="font-family:Calibri;">2507</span><span style="font-family:宋體(tǐ);">不锈钢应用(yòng)于石油和天然气工业；海上石破天油平台</span><span style="font-family:Calibri;">(</span><span style="font-family:宋體(tǐ);">热交换器管，水处理(lǐ)和供水系统，消防系统</span><span style="font-family:Calibri;">,</span><span style="font-family:宋體(tǐ);">喷水系统，稳水系统；石油化工设备；脱盐</span><span style="font-family:Calibri;">(</span><span style="font-family:宋體(tǐ);">淡化</span><span style="font-family:Calibri;">)</span><span style="font-family:宋體(tǐ);">设备</span><span style="font-family:Calibri;">(</span><span style="font-family:宋體(tǐ);">和设备中的高压管，海水管</span><span style="font-family:Calibri;">)</span><span style="font-family:宋體(tǐ);">；既需要高强度同时又(yòu)需要高耐腐蚀性的机械和结构部件；燃</span><span style="font-family:Calibri;">(</span><span style="font-family:宋體(tǐ);">废</span><span style="font-family:Calibri;">)</span><span style="font-family:宋體(tǐ);">气净化设备。</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:Calibri;">2507</span><span style="font-family:宋體(tǐ);">不锈钢无缝管主要成分(fēn)</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(tǐ);">不锈钢无缝管各國(guó)标准对照</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(tǐ);">： </span><span style="font-family:Calibri;">1.4410</span><span style="font-family:宋體(tǐ);">、</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"> 抗腐蚀能(néng)力<o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:Calibri;">1.</span><span style="font-family:宋體(tǐ);">一般腐蚀：</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:Calibri;">SAF 2507</span><span style="font-family:宋體(tǐ);">的较高的铬及钼含量使其对有(yǒu)机酸如甲酸、乙酸等具有(yǒu)较强的抗整體(tǐ)腐蚀的能(néng)力。</span><span style="font-family:Calibri;">SAF2507</span><span style="font-family:宋體(tǐ);">合合金对无机酸，尤其是那些包含氯化物(wù)的无机酸也具有(yǒu)较强的抗腐蚀能(néng)力。</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:宋體(tǐ);">和</span><span style="font-family:Calibri;">904L</span><span style="font-family:宋體(tǐ);">相比，</span><span style="font-family:Calibri;">SAF2507</span><span style="font-family:宋體(tǐ);">对稀释的混有(yǒu)氯根离子的硫酸具有(yǒu)更强的抗腐蚀能(néng)力。</span><span style="font-family:Calibri;">904L</span><span style="font-family:宋體(tǐ);">是奥氏體(tǐ)状态的合金，专用(yòng)于抗纯硫酸腐蚀。</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:Calibri;">316L</span><span style="font-family:宋體(tǐ);">等级不能(néng)用(yòng)于盐酸环境中，它可(kě)能(néng)会遭到局部腐蚀或整體(tǐ)腐蚀。</span><span style="font-family:Calibri;">SAF2507</span><span style="font-family:宋體(tǐ);">可(kě)以用(yòng)于稀释的盐酸环境里，具有(yǒu)较强的抗斑损及抗裂隙腐蚀的能(néng)力。</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:Calibri;">2.</span><span style="font-family:宋體(tǐ);">晶间腐蚀：</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:Calibri;">nSAF 2507</span><span style="font-family:宋體(tǐ);">较低的碳含量大大地降低了在热处理(lǐ)时晶间中的碳化物(wù)沉淀的风险</span><span style="font-family:Calibri;">,</span><span style="font-family:宋體(tǐ);">因此</span><span style="font-family:Calibri;">,</span><span style="font-family:宋體(tǐ);">这个合金具有(yǒu)很(hěn)强的抵抗与碳化物(wù)相关的晶间腐蚀的能(néng)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(tǐ);">应力腐蚀开裂：</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:Calibri;">SAF 2507</span><span style="font-family:宋體(tǐ);">的复式结构使其具有(yǒu)较强的抗应力腐蚀开裂的能(néng)力。由于其较高的合金含量</span><span style="font-family:Calibri;">,SAF 2507</span><span style="font-family:宋體(tǐ);">的抗腐蚀能(néng)力及强度均优于</span><span style="font-family:Calibri;">2205.</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:宋體(tǐ);">裂缝在建筑等方面几乎是不可(kě)避免的</span><span style="font-family:Calibri;">,</span><span style="font-family:宋體(tǐ);">这使得不锈钢在氯化物(wù)的环境里更易受到腐蚀</span><span style="font-family:Calibri;">.SAF 2507 </span><span style="font-family:宋體(tǐ);">具有(yǒu)很(hěn)强的抗裂缝腐蚀的能(néng)力</span><span style="font-family:Calibri;">.SAF 2507</span><span style="font-family:宋體(tǐ);">在含有(yǒu)</span><span style="font-family:Calibri;">2000ppm</span><span style="font-family:宋體(tǐ);">氯离子的硫酸中的等腐蚀曲線(xiàn)</span><span style="font-family:Calibri;">0.1 mm/year;</span><span style="font-family:宋體(tǐ);">在盐酸中的等腐蚀曲線(xiàn)</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(tǐ);">机械特性</span><span style="font-family:Calibri;">:SAF 2507</span><span style="font-family:宋體(tǐ);">具有(yǒu)很(hěn)高的耐压强度、冲击强度及较低的热膨胀系数和较高的导热性</span><span style="font-family:Calibri;">.</span><span style="font-family:宋體(tǐ);">这些特性适用(yòng)于很(hěn)多(duō)结构零件及机械部件</span><span style="font-family:Calibri;">.SAF 2507</span><span style="font-family:宋體(tǐ);">冲击强度很(hěn)高</span><span style="font-family:Calibri;">,</span><span style="font-family:宋體(tǐ);">不宜長(cháng)期置于高于</span><span style="font-family:Calibri;">570</span><span style="font-family:宋體(tǐ);">°</span><span style="font-family:Calibri;">F</span><span style="font-family:宋體(tǐ);">的温度环境下</span><span style="font-family:Calibri;">,</span><span style="font-family:宋體(tǐ);">这样可(kě)能(néng)会减弱其韧性</span><span style="font-family:Calibri;">.</span><span style="font-family:宋體(tǐ);">抗拉强度</span><span style="font-family:Calibri;">:</span><span style="font-family:宋體(tǐ);">σ</span><span style="font-family:Calibri;">b</span><span style="font-family:宋體(tǐ);">≥</span><span style="font-family:Calibri;">730Mpa;</span><span style="font-family:宋體(tǐ);">延伸率</span><span style="font-family:Calibri;">:</span><span style="font-family:宋體(tǐ);">δ≥</span><span style="font-family:Calibri;">20%</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:宋體(tǐ);">配套焊材</span><span style="font-family:Calibri;">:ER2594</span><span style="font-family:宋體(tǐ);">焊丝，</span><span style="font-family:Calibri;">E2594</span><span style="font-family:宋體(tǐ);">焊条</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:宋體(tǐ);">应用(yòng)领域</span><span style="font-family:Calibri;">:</span><span style="font-family:宋體(tǐ);">纸浆和造纸工业，海水淡化，烟气净化，热交换器，化學(xué)品液货船管道系统，海水系统等。</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:Calibri;">2507</span><span style="font-family:宋體(tǐ);">不锈钢主要规格：</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:Calibri;">2507</span><span style="font-family:宋體(tǐ);">不锈钢板材现货规格</span><span style="font-family:Calibri;">:0.3mm-350mm(</span><span style="font-family:宋體(tǐ);">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(tǐ);">不锈钢棒材现货规格</span><span style="font-family:Calibri;">:3.0mm-500mm(</span><span style="font-family:宋體(tǐ);">直径</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(tǐ);">不锈钢線(xiàn)材现货规格</span><span style="font-family:Calibri;">:0.1mm-20mm(</span><span style="font-family:宋體(tǐ);">線(xiàn)径</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(tǐ);">不锈钢的化學(xué)成分(fēn)</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(tǐ);">≤</span><span style="font-family:Calibri;">0.03 </span><span style="font-family:宋體(tǐ);">、</span><span style="font-family:Calibri;">Si</span><span style="font-family:宋體(tǐ);">≤</span><span style="font-family:Calibri;">0.80 </span><span style="font-family:宋體(tǐ);">、</span><span style="font-family:Calibri;">Mn</span><span style="font-family:宋體(tǐ);">≤</span><span style="font-family:Calibri;">1.2 </span><span style="font-family:宋體(tǐ);">、</span><span style="font-family:Calibri;">Cr:24-26 </span><span style="font-family:宋體(tǐ);">、</span><span style="font-family:Calibri;">Ni:6-8 </span><span style="font-family:宋體(tǐ);">、</span><span style="font-family:Calibri;">S</span><span style="font-family:宋體(tǐ);">≤</span><span style="font-family:Calibri;">0.02 </span><span style="font-family:宋體(tǐ);">、</span><span style="font-family:Calibri;">P</span><span style="font-family:宋體(tǐ);">≤</span><span style="font-family:Calibri;">0.035 </span><span style="font-family:宋體(tǐ);">、</span><span style="font-family:Calibri;">Mo:3-5 </span><span style="font-family:宋體(tǐ);">、</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(tǐ);">不锈钢无缝管在适宜固溶处理(lǐ)后，此钢的显微组织有(yǒu)比较理(lǐ)想的α</span><span style="font-family:Calibri;">/</span><span style="font-family:宋體(tǐ);">γ之比约為(wèi)</span><span style="font-family:Calibri;">50/50</span><span style="font-family:宋體(tǐ);">的双相结构。当固溶温度在</span><span style="font-family:Calibri;">1050</span><span style="font-family:宋體(tǐ);">℃以上时，随温度升高，钢中铁素體(tǐ)相数量会有(yǒu)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(tǐ);">℃以下刚的相比例不会有(yǒu)显著改变。此钢若不经不同温度时效</span><span style="font-family:Calibri;">(</span><span style="font-family:宋體(tǐ);">或受热的影响</span><span style="font-family:Calibri;">)</span><span style="font-family:宋體(tǐ);">，在α</span><span style="font-family:Calibri;">+</span><span style="font-family:宋體(tǐ);">γ基體(tǐ)上会有(yǒu)γ</span><span style="font-family:Calibri;">2</span><span style="font-family:宋體(tǐ);">形成和δ、χ、</span><span style="font-family:Calibri;">R</span><span style="font-family:宋體(tǐ);">、α</span><span style="font-family:Calibri;">`</span><span style="font-family:宋體(tǐ);">金属间相和</span><span style="font-family:Calibri;">Cr2N</span><span style="font-family:宋體(tǐ);">等氧化物(wù)析出，由于钢中的碳含量低</span><span style="font-family:Calibri;">(</span><span style="font-family:宋體(tǐ);">一般在</span><span style="font-family:Calibri;">0.01%-0.02%)</span><span style="font-family:宋體(tǐ);">，因此钢中一般没有(yǒu)碳化物(wù)存在。</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:Calibri;">2507</span><span style="font-family:宋體(tǐ);">不锈钢无缝管产品的力學(xué)性能(néng)</span><span style="font-family:Calibri;">:</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:宋體(tǐ);">一、</span><span style="font-family:Calibri;">2507</span><span style="font-family:宋體(tǐ);">不锈钢无缝管的室温力學(xué)性能(néng)</span><span style="font-family:Calibri;">:</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:宋體(tǐ);">钢材品种</span><span style="font-family:Calibri;">:&nbsp; &nbsp;</span><span style="font-family:宋體(tǐ);">壁厚≤</span><span style="font-family:Calibri;">20mm ;</span><span style="font-family:宋體(tǐ);">δ</span><span style="font-family:Calibri;">b/MPa:800-1000 </span><span style="font-family:宋體(tǐ);">、δ</span><span style="font-family:Calibri;">0.2/MPa:</span><span style="font-family:宋體(tǐ);">≥</span><span style="font-family:Calibri;">550 </span><span style="font-family:宋體(tǐ);">、δ</span><span style="font-family:Calibri;">5/%:</span><span style="font-family:宋體(tǐ);">≥</span><span style="font-family:Calibri;">25 </span><span style="font-family:宋體(tǐ);">、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(tǐ);">二、</span><span style="font-family:Calibri;">2507</span><span style="font-family:宋體(tǐ);">双相不锈钢板在室温</span><span style="font-family:Calibri;">--200</span><span style="font-family:宋體(tǐ);">℃的力學(xué)性能(néng)</span><span style="font-family:Calibri;">:</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:宋體(tǐ);">钢材品种</span> 温度<span style="font-family:Calibri;">/</span><span style="font-family:宋體(tǐ);">℃ δ</span><span style="font-family:Calibri;">b/MPa</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:宋體(tǐ);">室温</span> ≥<span style="font-family:Calibri;">530</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:宋體(tǐ);">板材</span> <span style="font-family:Calibri;">100 </span><span style="font-family:宋體(tǐ);">≥</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(tǐ);">≥</span><span style="font-family:Calibri;">400</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:宋體(tǐ);">三、</span><span style="font-family:Calibri;">2507</span><span style="font-family:宋體(tǐ);">大口径无缝管的力學(xué)性能(néng)</span><o:p></o:p> </p> <p class="MsoNormal"> <span style="font-family:宋體(tǐ);">外径</span>×壁厚 δ<span style="font-family:Calibri;">b/MPa </span><span style="font-family:宋體(tǐ);">δ</span><span style="font-family:Calibri;">0.2/MPa </span><span style="font-family:宋體(tǐ);">δ</span><span style="font-family:Calibri;">5/% </span><span style="font-family:宋體(tǐ);">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(tǐ);">×</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(tǐ);">×</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(tǐ);">×</span><span style="font-family:Calibri;">4.74mm 854 657 41 272</span><o:p></o:p> </p>