西安2507/2205不锈钢管的组织与性能(néng)

摘要：<p style="margin:0pt;"> <span style="font-family:宋體(tǐ);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(tǐ);">西安</span></span><span style="font-family:Calibri;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;mso-fareast-font-family:宋體(tǐ);">2507</span><span style="font-family:宋體(tǐ);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;">/2205<span style="font-family:宋體(tǐ);">不锈钢</span></span><span style="font-family:Calibri;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;mso-fareast-font-family:宋體(tǐ);"><span style="font-family:宋體(tǐ);">管的组织与性能(néng)</span></span> </p> <p style="margin:0pt;"> <span style="font-family:Calibri;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;mso-fareast-font-family:宋體(tǐ);"><span style="font-family:宋體(tǐ);">采用(yòng)热穿孔工艺，结合多(duō)道次冷轧变形，开发出大口径</span>2507<span style="font-family:宋體(tǐ);">无缝钢管，规格為(wèi)</span></span><span style="font-family:宋體(tǐ);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;">219*20</span><span style="font-family:Calibri;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;mso-fareast-font-family:宋體(tǐ);">mm<span style="font-family:宋體(tǐ);">。结果表明：</span><span style="font-family:Calibri;">2507</span><span style="font-family:宋體(tǐ);">无缝钢管金相组织优良，铁素體(tǐ)含量约</span><span style="font-family:Calibri;">45%</span><span style="font-family:宋體(tǐ);">～</span><span style="font-family:Calibri;">55%</span><span style="font-family:宋體(tǐ);">。钢管具有(yǒu)良好的力學(xué)性能(néng)，低温冲击功可(kě)达</span><span style="font-family:Calibri;">70J</span><span style="font-family:宋體(tǐ);">以上。同时，钢管具有(yǒu)较好的耐点腐蚀性能(néng)，腐蚀速率小(xiǎo)于</span><span style="font-family:Calibri;">3.0mdd</span><span style="font-family:宋體(tǐ);">。本次开发的大口径</span><span style="font-family:Calibri;">2507</span><span style="font-family:宋體(tǐ);">无缝钢管化學(xué)组成、金相组织及室温力學(xué)性能(néng)、低温冲击性能(néng)均满足</span><span style="font-family:Calibri;">ASME SA790</span><span style="font-family:宋體(tǐ);">、</span><span style="font-family:Calibri;">ISO 13680</span><span style="font-family:宋體(tǐ);">等产品标准要求，可(kě)以用(yòng)于石化、海洋、油气开采等领域。 </span></span> </p> <p style="margin:0pt;"> <span style="font-family:Calibri;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;mso-fareast-font-family:宋體(tǐ);"><span style="font-family:宋體(tǐ);">超级双相不锈钢</span>(UNS 2507)<span style="font-family:宋體(tǐ);">由于超低碳和高铬、高钼、高氮的成分(fēn)设计，与</span><span style="font-family:Calibri;">UNS S32205</span><span style="font-family:宋體(tǐ);">双相不锈钢相比，具有(yǒu)更高的强度、更好的耐点腐蚀、耐应力腐蚀性能(néng)。目前主要用(yòng)于各种苛刻环境，尤其是在高氯化物(wù)环境中，常用(yòng)作海水热交换器、海底油田管道缆、海水淡化等装置。 </span></span><span style="font-family:Calibri;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;mso-fareast-font-family:宋體(tǐ);"><br /> </span><span style="font-family:Calibri;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;mso-fareast-font-family:宋體(tǐ);"><span style="font-family:宋體(tǐ);">苛刻的酸性油气田环境中，根据介质浓度、温度、压力等工况，可(kě)选用(yòng)的材料主要有(yǒu)马氏體(tǐ)不锈钢、双相不锈钢和镍基合金等。因此，在一些高温、高压、高含</span>CO2<span style="font-family:宋體(tǐ);">、</span><span style="font-family:Calibri;">H2S</span><span style="font-family:宋體(tǐ);">环境中常采用(yòng)镍基合金材料。而在一些含</span><span style="font-family:Calibri;">CO2</span><span style="font-family:宋體(tǐ);">、</span><span style="font-family:Calibri;">Cl-</span><span style="font-family:宋體(tǐ);">且</span><span style="font-family:Calibri;">H2S</span><span style="font-family:宋體(tǐ);">含量较低的油气开采环境中，</span><span style="font-family:Calibri;">2507</span><span style="font-family:宋體(tǐ);">合金由于具有(yǒu)冷加工硬化显著、抗应力腐蚀性能(néng)好、耐点蚀，相对于镍基合金油井管而言，具有(yǒu)价格低、性能(néng)相当等特点，综合性能(néng)则优于马氏體(tǐ)不锈钢。因此得到越来越广泛的应用(yòng)，应用(yòng)形式主要是管材</span><span style="font-family:Calibri;">[1]-[5]</span><span style="font-family:宋體(tǐ);">。 </span></span><span style="font-family:Calibri;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;mso-fareast-font-family:宋體(tǐ);"><br /> </span><span style="font-family:Calibri;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;mso-fareast-font-family:宋體(tǐ);"><span style="font-family:宋體(tǐ);">通常来讲，无缝钢管尺寸较小(xiǎo)时，通过热挤压工艺或者热穿孔工艺，结合冷轧工艺可(kě)以生产出符合要求的超级双相无缝钢管。但是，对于大口径超级双相无缝钢管，采用(yòng)热挤压工艺生产比较困难，特别是管材長(cháng)度要求较長(cháng)时。因此，针对大口径</span>(<span style="font-family:宋體(tǐ);">外径大于</span><span style="font-family:Calibri;">219mm)</span><span style="font-family:宋體(tǐ);">、長(cháng)度较長(cháng)</span><span style="font-family:Calibri;">(9m</span><span style="font-family:宋體(tǐ);">以上</span><span style="font-family:Calibri;">)</span><span style="font-family:宋體(tǐ);">等特殊需求，本公司开展了</span><span style="font-family:Calibri;">2507</span><span style="font-family:宋體(tǐ);">超级双相无缝钢管的研制开发，并形成了批量生产的能(néng)力。 </span></span> </p> <p style="margin:0pt;"> <span style="font-family:Calibri;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;mso-fareast-font-family:宋體(tǐ);">1<span style="font-family:宋體(tǐ);">、大口径</span><span style="font-family:Calibri;">2507</span><span style="font-family:宋體(tǐ);">无缝钢管的制造流程 </span></span> </p> <p style="margin:0pt;"> <span style="font-family:Calibri;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;mso-fareast-font-family:宋體(tǐ);"><span style="font-family:宋體(tǐ);">大口径</span>2507<span style="font-family:宋體(tǐ);">合金无缝钢管的整个开发制造流程可(kě)以简化為(wèi)：钢锭冶炼</span><span style="font-family:Calibri;">→</span><span style="font-family:宋體(tǐ);">锻造开坯</span><span style="font-family:Calibri;">→</span><span style="font-family:宋體(tǐ);">管坯加工</span><span style="font-family:Calibri;">→</span><span style="font-family:宋體(tǐ);">热穿孔</span><span style="font-family:Calibri;">→</span><span style="font-family:宋體(tǐ);">冷轧成形</span><span style="font-family:Calibri;">→</span><span style="font-family:宋體(tǐ);">固溶热处理(lǐ)</span><span style="font-family:Calibri;">→</span><span style="font-family:宋體(tǐ);">酸洗</span><span style="font-family:Calibri;">→</span><span style="font-family:宋體(tǐ);">检验</span><span style="font-family:Calibri;">→</span><span style="font-family:宋體(tǐ);">成品。 </span></span><span style="font-family:Calibri;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;mso-fareast-font-family:宋體(tǐ);"><br /> </span><span style="font-family:Calibri;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;mso-fareast-font-family:宋體(tǐ);"><span style="font-family:宋體(tǐ);">钢坯由某特钢公司提供，采用(yòng)電(diàn)炉</span>+AOD<span style="font-family:宋體(tǐ);">精炼工艺冶炼。经公司入厂复验，管坯化學(xué)成分(fēn)见表</span><span style="font-family:Calibri;">1</span><span style="font-family:宋體(tǐ);">，结果表明成分(fēn)符合</span><span style="font-family:Calibri;">ASME SA790</span><span style="font-family:宋體(tǐ);">、</span><span style="font-family:Calibri;">ISO 13680</span><span style="font-family:宋體(tǐ);">等相关产品标准要求。管坯各类夹杂物(wù)含量為(wèi)</span><span style="font-family:Calibri;">0.5</span><span style="font-family:宋體(tǐ);">～</span><span style="font-family:Calibri;">1.5</span><span style="font-family:宋體(tǐ);">级，也符合技术条件要求，如图</span><span style="font-family:Calibri;">1</span><span style="font-family:宋體(tǐ);">所示</span></span><span style="font-family:Calibri;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;mso-fareast-font-family:宋體(tǐ);"><br /> </span><span style="font-family:Calibri;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;mso-fareast-font-family:宋體(tǐ);"><span style="font-family:宋體(tǐ);">钢坯经剥皮机剥皮后，彻底消除表面的缺陷</span>(<span style="font-family:宋體(tǐ);">氧化皮、裂纹等</span><span style="font-family:Calibri;">)</span><span style="font-family:宋體(tǐ);">。根据实际要求将钢坯进行分(fēn)段、机加工，并进行尺寸公差和表面质量检查。管坯在加热前进行清洗，**管坯内外表面上的油脂和污物(wù)，防止管坯在加热过程中被污染，确保管坯质量。将清洗后的管坯送入斜底式加热炉中进行加热到设定温度后，送入斜轧穿孔机中进行热穿孔，得到内外表面质量良好、性能(néng)均匀的穿孔荒管。荒管经过固溶热处理(lǐ)后进行内外表面检验，為(wèi)后续冷轧工艺提供合格的荒管，并為(wèi)*终的成品管材提供了可(kě)靠的质量保证。穿孔荒管在周期式冷轧管机上完成冷轧变形，经过多(duō)道次冷轧，*终轧制出</span><span style="font-family:Calibri;">251mm×17mm</span><span style="font-family:宋體(tǐ);">的成品钢管，長(cháng)度达</span><span style="font-family:Calibri;">10m</span><span style="font-family:宋體(tǐ);">以上。 </span></span> </p> <p style="margin:0pt;"> <span style="font-family:Calibri;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;mso-fareast-font-family:宋體(tǐ);">2<span style="font-family:宋體(tǐ);">、大口径</span><span style="font-family:Calibri;">2507</span><span style="font-family:宋體(tǐ);">无缝钢管的组织与性能(néng) </span></span> </p> <p style="margin:0pt;"> <span style="font-family:Calibri;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;mso-fareast-font-family:宋體(tǐ);">2.1 <span style="font-family:宋體(tǐ);">金相组织演化</span></span><span style="font-family:Calibri;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;mso-fareast-font-family:宋體(tǐ);">&nbsp;</span><span style="font-family:Calibri;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;mso-fareast-font-family:宋體(tǐ);"><br /> </span><span style="font-family:Calibri;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;mso-fareast-font-family:宋體(tǐ);"><span style="font-family:宋體(tǐ);">由于采用(yòng)热穿孔工艺进行荒管制备，穿孔工艺对荒管金相组织的影响非常显著，特别影响到两相比与相组织、形态的控制。如果穿孔工艺控制不好的话，在荒管组织中容易产生金属间相、二次奥氏體(tǐ)相等，进而影响到荒管质量和成品管材的性能(néng)。</span> </span><span style="font-family:Calibri;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;mso-fareast-font-family:宋體(tǐ);"><br /> </span><span style="font-family:Calibri;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;mso-fareast-font-family:宋體(tǐ);"><span style="font-family:宋體(tǐ);">试验检验结果表明，热穿孔荒管金相组织较差，两相比例不协调，并且含有(yǒu)较多(duō)的**相，如图</span>2(a)<span style="font-family:宋體(tǐ);">所示。特别是，由于钢材存在随温度的降低发生由韧性到脆性的转变。一旦钢管组织不正常，低温</span><span style="font-family:Calibri;">(-10℃</span><span style="font-family:宋體(tǐ);">～</span><span style="font-family:Calibri;">-50℃)</span><span style="font-family:宋體(tǐ);">冲击性能(néng)则大大恶化，冲击功降低到</span><span style="font-family:Calibri;">20J</span><span style="font-family:宋體(tǐ);">左右，甚至更低，此时断口形貌為(wèi)明显的脆性断裂特征，如图</span><span style="font-family:Calibri;">3(a)</span><span style="font-family:宋體(tǐ);">所示。因此对热穿孔荒管及中间规格管进行合适的热处理(lǐ)，调整钢管内部组织中的两相比例与相组成、形态。试验结果表明，经过适当热处理(lǐ)后，中间管的金相组织逐渐恢复正常，基本上未见金属间相等出现，如图</span><span style="font-family:Calibri;">2(b)</span><span style="font-family:宋體(tǐ);">所示。低温</span><span style="font-family:Calibri;">(-10℃</span><span style="font-family:宋體(tǐ);">～</span><span style="font-family:Calibri;">-50℃)</span><span style="font-family:宋體(tǐ);">冲击性能(néng)逐渐提高到</span><span style="font-family:Calibri;">60</span><span style="font-family:宋體(tǐ);">～</span><span style="font-family:Calibri;">150J</span><span style="font-family:宋體(tǐ);">左右，断口特征从脆性断裂转变為(wèi)韧性断裂特征，如图</span><span style="font-family:Calibri;">3(b)</span><span style="font-family:宋體(tǐ);">所示</span></span> </p> <p style="margin:0pt;"> <span style="font-family:Calibri;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;mso-fareast-font-family:宋體(tǐ);">2.2 <span style="font-family:宋體(tǐ);">力學(xué)性能(néng) </span></span><span style="font-family:Calibri;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;mso-fareast-font-family:宋體(tǐ);"><br /> </span><span style="font-family:Calibri;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;mso-fareast-font-family:宋體(tǐ);"><span style="font-family:宋體(tǐ);">从成品钢管取样分(fēn)别进行包括金相、室温拉伸和低温冲击试验、点腐蚀性能(néng)评价试验，以评价钢管的使用(yòng)性能(néng)及工艺性能(néng)。</span> </span><span style="font-family:Calibri;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;mso-fareast-font-family:宋體(tǐ);"><br /> </span><span style="font-family:Calibri;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;mso-fareast-font-family:宋體(tǐ);"><span style="font-family:宋體(tǐ);">金相结果如图</span>2(c)<span style="font-family:宋體(tǐ);">中所示。从测试结果可(kě)以看出，成品钢管中两相含量比较均匀，铁素體(tǐ)含量大约在</span><span style="font-family:Calibri;">45%</span><span style="font-family:宋體(tǐ);">～</span><span style="font-family:Calibri;">55%</span><span style="font-family:宋體(tǐ);">左右，符合相关产品标准。同时，两相界面清晰、过渡光滑，未见金属间等**相。 </span></span> </p> <p style="margin:0pt;"> <span style="font-family:Calibri;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;mso-fareast-font-family:宋體(tǐ);"><span style="font-family:宋體(tǐ);">对成品规格的</span>2507<span style="font-family:宋體(tǐ);">管的冲击功，进行了检测，结果如图</span><span style="font-family:Calibri;">4</span><span style="font-family:宋體(tǐ);">所示。从图中可(kě)以发现，无论是固溶态还是冷变形态的成品管，其冲击性能(néng)优异。冲击功随着实验温度的降低而降低，且固溶态的冲击功遠(yuǎn)高于冷加工态。 </span></span><span style="font-family:Calibri;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;mso-fareast-font-family:宋體(tǐ);"><br /> </span><span style="font-family:Calibri;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;mso-fareast-font-family:宋體(tǐ);"><span style="font-family:宋體(tǐ);">此外，成品管的低温</span>(-10℃)<span style="font-family:宋體(tǐ);">冲击功均高于</span><span style="font-family:Calibri;">70J</span><span style="font-family:宋體(tǐ);">。对其断口进行观察发现，為(wèi)韧性断裂，如图</span><span style="font-family:Calibri;">3(b)</span><span style="font-family:宋體(tǐ);">所示。 </span></span><span style="font-family:Calibri;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;mso-fareast-font-family:宋體(tǐ);"><br /> </span><span style="font-family:Calibri;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;mso-fareast-font-family:宋體(tǐ);"><span style="font-family:宋體(tǐ);">采用(yòng)</span>ASTM G48A<span style="font-family:宋體(tǐ);">法进行了点腐蚀实验。结果表明，点腐蚀速率小(xiǎo)于</span><span style="font-family:Calibri;">3.0 mdd</span><span style="font-family:宋體(tǐ);">。综合金相组织、冲击性能(néng)、室温拉伸、点腐蚀等检验结果，可(kě)以发现，本次开发的大口径</span><span style="font-family:Calibri;">2507</span><span style="font-family:宋體(tǐ);">无缝钢管性能(néng)优异，完全满足</span><span style="font-family:Calibri;">ASMESA790</span><span style="font-family:宋體(tǐ);">、</span><span style="font-family:Calibri;">ISO13680</span><span style="font-family:宋體(tǐ);">标准要求。 </span></span> </p> <p style="margin:0pt;"> <span style="font-family:Calibri;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;mso-fareast-font-family:宋體(tǐ);">3<span style="font-family:宋體(tǐ);">、结论 </span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋體(tǐ);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(tǐ);">西安华达不锈钢有(yǒu)限公司</span></span><span style="font-family:Calibri;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;mso-fareast-font-family:宋體(tǐ);"><span style="font-family:宋體(tǐ);">有(yǒu)限公司采用(yòng)热穿孔和冷轧工艺成功开发了规格為(wèi)</span>2</span><span style="font-family:宋體(tǐ);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;">19*20</span><span style="font-family:Calibri;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;mso-fareast-font-family:宋體(tǐ);">mm<span style="font-family:宋體(tǐ);">的大口径</span><span style="font-family:Calibri;">2507</span><span style="font-family:宋體(tǐ);">超级双相无缝钢管。大口径</span><span style="font-family:Calibri;">2507</span><span style="font-family:宋體(tǐ);">无缝钢管金相组织、力學(xué)性能(néng)优异，符合</span><span style="font-family:Calibri;">ASME SA790</span><span style="font-family:宋體(tǐ);">、状态抗拉强度</span><span style="font-family:Calibri;">/MPa </span><span style="font-family:宋體(tǐ);">屈服强度</span><span style="font-family:Calibri;">/MPa </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);">硬度</span><span style="font-family:Calibri;">/HRC</span><span style="font-family:宋體(tǐ);">冷变形</span><span style="font-family:Calibri;">1060 960 27 33</span><span style="font-family:宋體(tǐ);">固溶态</span><span style="font-family:Calibri;">815 580 44 25ISO13680</span><span style="font-family:宋體(tǐ);">等产品标准，可(kě)用(yòng)于石化、海洋、油气开采等领域。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:Calibri;font-size:10.5pt;mso-spacerun:&quot;yes&quot;;mso-bidi-font-family:&quot;Times New Roman&quot;;mso-font-kerning:1.0000pt;mso-fareast-font-family:宋體(tǐ);">&nbsp;</span> </p>