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《现代制造技术与装备》2019,(10)
随着双相不锈钢在各行各业的应用,双相不锈钢加工也受到了各行各业尤其是制作业的关注,对双相不锈钢机械加工的研究也越来越多,并取得了一定成果。基于此,对双相不锈钢的深孔加工技术进行研究,并以实际加工为例,阐述不锈钢深孔加工过程中存在的问题以及应对措施,旨在为双目不锈钢深孔加工提供参考依据。 相似文献
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超极双相不锈钢设备的制造 总被引:3,自引:0,他引:3
本文介绍了超级双相不锈钢的性质和特点,以某工程项目为例,分析和阐述了在超级双相不锈钢设备制造过程中切割、成型、热处理、焊道和表面处理应注意的一些问题,强调了应严防σ相的产生,总结了得到满意的焊接接头的方法。 相似文献
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双相不锈钢近年来在不同行业里都有着广泛的用途。总体说来,双相不锈钢的焊接具有一定的特殊性。本文将在分析双相不锈钢的成分、组织和性能,焊接冶金以及焊接性问题的基础上,提出双相不锈钢的焊接工艺要点,以期能对实际焊接运用有一定的作用。 相似文献
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双相不锈钢换热器设计制造技术 总被引:6,自引:2,他引:4
UNS S31803双相不锈钢用于制造耐蚀换热设备在国内尚属起步阶段,工程项目中的UNS S31803双相不锈钢换热器在设计制造等方面的技术应用,对双相不锈钢的进一步推广应用有一定的借鉴作用。 相似文献
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陈坚 《机械工人(热加工)》2008,(8):49-50,55
从探讨氧氯化反应器冷却管束国产化制造过程中SAF2205双相不锈钢的焊接问题入手,着重分析和制定了双相钢焊接工艺方案和质量保证措施,完成了SAF2205双相不锈钢管束的国产化研制,并且运行正常。 相似文献
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G. Madhusudan Reddy K. Srinivasa Rao 《The International Journal of Advanced Manufacturing Technology》2009,45(9-10):875-888
Microstructure and mechanical properties of similar and dissimilar welds of austenitic stainless steel (AISI 304), ferritic stainless steel (AISI 430), and duplex stainless steel (AISI 2205) have been studied. Welding processes electron beam welding and friction welding were used. Optical, scanning electron microscopy, and electron probe microscopy were carried out to study the microstructural changes. Residual stress, hardness, tensile strength, and impact toughness testing were conducted to study mechanical behavior. Dissimilar metal electron beam welds of austenitic–ferritic, ferritic–duplex, and austenitic–duplex stainless steel welds contained coarse grains, which are predominantly equiaxed on austenitic, duplex stainless steel side, and they are columnar on the ferritic stainless steel side. Diffusion of elements was significant in electron beam welding and insignificant in friction welds. Austenitic–ferritic stainless steel exhibited tensile residual stress on the ferritic stainless steel side adjacent to the interface, compressive stresses on the austenitic stainless steel side that matches with the delta ferrite microstructure observed in this region. High compressive stresses were noted on duplex stainless steel side interface compared to austenitic stainless side interface. The highest tensile strength was observed in duplex–austenitic stainless steel joints. The impact strength and notch tensile strength of electron beam weldments are higher than the friction weldments. All electron beam and friction welds showed toughness lower than parent metals. 相似文献
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应用宏观、无损、金相、α相测定、断口、能谱等试验方法,对高残余应力下2507双相不锈钢Cl-应力腐蚀裂纹特征、路径、成因等进行分析。结果表明,双相不锈钢构件只有在特定的条件下(较低的应力水平、较低的温度、含有Cl-的中性溶液中),其突出的抗Cl-应力腐蚀开裂性能才能充分显现。上述条件有一个被突破,特别是高应力下(如厚件大面积堆焊所产生的大范围、高峰值残余应力),即使像2507这样的超级双相不锈钢,其抗应力腐蚀开裂的能力也将严重降低。该项工作对双相不锈钢的应用和结构制造具有一定参考价值。 相似文献
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焊接双相不锈钢S31803时容易出现焊接裂纹、热影响区脆化以及形成气孔等问题.文中从化学成分、组织状态、焊接冶金方面研究双相不锈钢S31803的焊接性,提出了合理选择焊接材料和制定焊接工艺的优化焊接性的途径. 相似文献
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通过恒温拉伸机对固溶处理与冷轧加工后的SAF2906双相不锈钢进行恒温拉伸试验,分析其在不同条件下超塑性伸长率的变化。利用扫描电镜与透射电镜对其进行内部组织观察,了解其两相比例的变化情况。试验结果表明,SAF2906双相不锈钢中铁素体相(δ相)与奥氏体相(γ相)的两相体积比随固溶温度的变化而改变,随着固溶温度的升高铁素体比例不断上升,其中当铁素体与奥氏体的两相体积比接近1∶1的情况下,SAF2906双相不锈钢展现出良好的超塑性性能;在机械加工方面可以通过提高冷轧压下量的方法提高SAF2906双相不锈钢的超塑伸长率,试验中试样的伸长率随着冷轧变形量的提高而明显增大,当固溶温度为1 100 ℃,冷轧压下量为85%时,变形温度为960 ℃,应变速率为1×103 s1的条件下,SAF2906双相不锈钢伸长率为1 430%。 相似文献
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不同焊接工艺对双相钢(SAF2205)金相组织的影响 总被引:8,自引:2,他引:8
为了确定合理的焊接工艺 ,使双相不锈钢 (SAF2 2 0 5 )的焊接接头具有预期的金相组织和相比例 ,以保证该双相钢的焊接接头具有较强的抗腐蚀能力 ,本文分析研究了该材料在不同焊接工艺下产生的金相组织和相比例 ,对实际生产中双相不锈钢的焊接具有较好地指导作用。 相似文献
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为优选海水淡化高压泵关键零部件耐磨性能材料,以Al_2O_3陶瓷与TC4钛合金、316不锈钢、2205双相不锈钢组成的配对摩擦副作为研究对象,利用立式万能摩擦磨损试验机开展干摩擦、纯水及海水3种环境介质下配对材料的摩擦磨损试验,定量得到各摩擦副摩擦因数、磨损量,并对摩擦试样的表面形貌进行分析;采用正交试验法分析载荷、转速、环境介质对摩擦因数和磨损量的影响规律。结果表明:在相同的条件下,TC4钛合金与陶瓷配副摩擦因数较小,2205双相不锈钢与陶瓷配副磨损量较小;环境介质对摩擦因数影响较大,载荷对磨损量的影响较大;海水环境下2205双相不锈钢和316不锈钢磨痕较浅,磨损机制为疲劳磨损、磨粒磨损和腐蚀磨损的交互作用。 相似文献
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R. Shashanka 《摩擦学汇刊》2017,60(2):324-336
The nonlubricated sliding wear behavior of nano-yttria-dispersed and yttria-free duplex and ferritic stainless steel against a diamond tip was studied. The stainless steel samples were fabricated by a conventional powder metallurgy route in which nano-yttria-dispersed and yttria-free duplex and ferritic stainless steel powders were cold compacted and then conventionally sintered at either 1000, 1200, or 1400°C in an argon atmosphere. For comparison, another set of samples was sintered at 1000°C in a nitrogen atmosphere. The wear behavior of sintered stainless steel samples against a diamond indenter was investigated using a pin-on-disc apparatus at 10 and 20 N loads and at a constant speed of 0.0041 m/s. It is proposed that yttria-dispersed stainless steels showed higher wear resistance compared to yttria-free stainless steel due to their improved hardness and density. Stainless steel sintered in a nitrogen atmosphere exhibited better wear resistance than those sintered in an argon atmosphere due to the formation of hard and brittle Cr2N. The wear mechanisms of stainless steels against diamond were found to be mainly abrasive and oxidative. Semiquantitative analysis of the worn surfaces and wear debris confirmed the occurrence of oxidation processes during wear. 相似文献