用N2背面保护焊接奥氏体钢管

研究了采用ＴＩＧ焊技术焊接１Ｃｒ１８Ｎｉ９Ｔｉ向管子时,以Ｎ２代替Ａｒ背面保护焊缝的组织和性能,分析了极限焊缝列层中的Ｎ和Ｏ元素的分布,测量了焊缝中的δ－铁素体、Ｎ和Ｏ的含量。研究结果表明：Ｎ２可以代替Ａｒ背面保持１Ｃｒ１８Ｎｉ９Ｔｉ钢焊缝,焊缝表层原Ｎ,Ｏ的分布和焊缝中的δ－铁素体、Ｎ和Ｏ的含量无明显变化。     

钛合金与不锈钢真空扩散焊接的研究

对钛合金ＴＣ４与不锈钢１Ｃｒ１８Ｎｉ９Ｔｉ异种金属扩散焊接头的结合性能进行了试验研究，利用光学显微镜，扫描电镜，电子探针仪等对接头进行了微观分析。     

镍离子注入Al2O3/1Cr18Ni9Ti钎焊界面成分分析

利用扫描电镜观察了镍离子注入Ａｌ２Ｏ３／１Ｃｒ１８Ｎｉ９Ｔｉ钎焊界面的形貌,并用ｘｌⅡ能谱分析仪对焊缝进行面、线和点扫描成分分析,结果表明,焊接面非常完整,在Ａｌ２Ｏ钎焊料／１Ｃｒ１８Ｎｉ９Ｔｉ相互界面处存在着元素扩散。     

1Cr18Ni9Ti／Q235—A不锈复合钢板的焊接工艺

介绍了１Ｃｒ１８Ｎｉ９Ｔｉ／Ｑ２３５－Ａｉ ｑｔｅｎｔ     

Ni—P化学镀层配方影响抗冲蚀性能的研究

研究了在含ＨＣｌ与不含ＨＣｌ的介质中，三种不同配方的Ｎｉ－Ｐ化学镀层的抗冲蚀行为，并与不锈钢１Ｃｒ１８Ｎｉ９Ｔｉ和２Ｃｒ１３作了对比。试验在自制试验机上进行。结果表明，Ｎｉ－Ｐ镀层的冲蚀机理主要表现为片状剥落和微切削。而在含ＨＣｌ介质的冲蚀浆体中其抗冲蚀腐蚀性能要优于无ＨＣｌ介质的浆体中的情况。在Ｃｌ＾－与Ｈ＾＋构成的腐蚀介质中，Ｎｉ－Ｐ化学镀层冲蚀抗力要优于１Ｃｒ１８Ｎｉ９Ｔｉ与２Ｃｒ１３。     

铸造铬锰氮下锈钢在5%H2SO4水砂介质中的腐蚀磨损行为

试验钢种在５％Ｈ２ＳＯ４水砂介质中作了腐蚀磨损试验，结果表明，新型铸造铬锰氮不锈钢较１Ｃｒ１８Ｎｉ９Ｔｉ（１８－８）及０Ｃｒ１８Ｎｉ１２Ｍｏ２Ｔｉ（Ｍｏ２Ｔｉ）钢具有更佳的抗腐蚀磨损性能。对腐蚀磨损过程中腐蚀与磨损的交互作用作了深入探讨，从而提出了腐蚀磨损条件下材料流失的判据。     

亚铵蒸煮液对蒸球的腐蚀性及采用热喷涂保护层的耐蚀性能研究

研究了在７％亚铵蒸煮液环境中钢板Ａ３的腐蚀变化规律,以及同种条件下采用热喷涂保护层附于Ａ３表面的耐蚀性能情况．结果表明,采用１Ｃｒ２５Ｎｉ２０和１Ｃｒ１８Ｎｉ９Ｔｉ的涂层于Ａ３表面,可使蒸球不受亚铵药液的腐蚀．     

1Cr18Ni9Ti钢低温退火强化研究

本文研究了１Ｃｒ１８Ｎｉ９Ｔｉ奥氏体不锈钢经预冷变形后性能随低温退火的变化规律．结果表明,低温退火后强度及其弹性极限显著提高     

1Cr18Ni9Ti钢低温退火强化研究

本文研究了１Ｃｒ１８Ｎｉ９Ｔｉ奥工体不锈钢经预冷变形后性能随低温退火的变化规律。结果表明，低温退火后强度及其弹性极限显著提高。     

铸造铬锰氮不锈钢在 5% H_2SO_4 水砂介质中的腐蚀磨损行为

试验钢种在５％Ｈ２ＳＯ４水砂介质中作了腐蚀磨损试验，结果表明：新型铸造铬锰氮不锈钢较１Ｃｒ１８Ｎｉ９Ｔｉ（１８－８）及０Ｃｒ１８Ｎｉ１２Ｍｏ２Ｔｉ（Ｍｏ２Ｔｉ）钢具有更佳的抗腐蚀磨损性能．对腐蚀磨损过程中腐蚀与磨损的交互作用作了深入探讨，从而提出了腐蚀磨损条件下材料流失的判据．     

Effect of sulphate-reducing bacteria on the electrochemical impedance spectroscopy characteristics of 1Cr18Ni9Ti

The electrochemical characteristics of 1Cr18Ni9Ti in sulphate-reducing bacteria (SRB) solutions and the biofilm of SRB on the surface of the 1Cr18Ni9Ti electrode were studied by electrochemical, microbiological, and surface analysis methods. Electro- chemical impedance spectroscopy (EIS) of 1Cr18Ni9Ti was measured in the solutions with and without SRB at the culture time of 2, 4, 8 d, respectively. The measurement used two test methods, the nonimmersion electrode method and the immersion electrode method. It was found that the polarization resistance (Rp) of 1Cr18Ni9Ti in the solutions without SRB is the greatest for each test method. When using the nonimmersion electrode method, Rp shifts negatively at first and then positively, and the time constant is only one. Although using the immersion electrode method, the Rp shifts positively at first and then negatively, and the time constant also changes when the biofilm forms. The biofilm observed through SEM is with pores. It was demonstrated that SRB has acceler- ated corrosion action on 1Cr18Ni9Ti. The protection effect of the biofilm on the electrode depends on the compact degree of the film.     

Interfacial microstructure of Cu Cr/1Cr18Ni9Ti bi-metal materials and its effect on bonding strength

The Cu Cr/1Cr18Ni9 Ti bi-metal materials were prepared by the solid-liquid bonding method. The microstructures, mechanical properties and formation mechanism of the bonding interface were studied. The results show that there exists a serrated transition layer with a certain width at the interface of Cu Cr/1Cr18Ni9 Ti bi-metal materials, and the transition layer consists of Fe-based and Cu-based solid solutions. The elastic modulus and hardness reach the maximum values at the interface closing to the 1Cr18Ni9 Ti zone. The bonding temperature has a significant effect on the width and morphology of the transition layer. The interfacial bonding strength is at least 30% higher than that of the Cu Cr alloy, and the tensile fracture occurs at the side of the Cu Cr alloy rather than at the bonding interface.     

薄壁1Cr18Ni9Ti奥氏体不锈钢的焊接试验

采用钨极氩弧焊的方法,对0.8 mm厚的1Cr18Ni9Ti奥氏体型不锈钢板实施焊接,并通LOM,SEM方法对焊接接头组织及断口形貌进行观察及分析;利用显微硬度计、电子万能拉伸机测量了焊接接头的力学性能.结果表明,通过手工钨极氩弧焊,采用直流正接接法(焊接电流为20 A,焊接速度为20 m/h)能够获得外观平整、组织均匀、力学性能满足要求的焊接接头.     

1Cr18Ni9Ti钢焊缝金属的氢脆

应用系列温度冲击试验方法,研究了1Cr18Ni9Ti钢焊缝金属的氢脆敏感性,发现氢使焊缝金属的冲击韧性降低,且随温度减低而加剧,断口表面的磁性测量及X射线衍射分析均表明:氢抑制了α′马氏体的生成。     

双金属铸造保险柜材料的研究

采用复合铸造法研制了具有防气割、防钻、防砸特性的高铬铸铁与１Ｃｒ１８Ｎｉ９Ｔｉ不锈风新型复合材料,试验结果表明：与普通Ａ３钢板相比,气割时间延长的３０倍,钻削时间延缓近百倍,是制造银行保险柜理想的材料。     

ZG1Cr18Ni9Ti的熔炼工艺探索

在100 kg中频快速熔炼炉中,为了减少ZG1Cr18Ni9Ti因熔炼原因造成的夹渣和气孔缺陷,在熔炼操作工艺上,改变了金属钛的加入方法,将传统的一次终脱氧改为两次,严格控制金属钛的加入时机和加入温度,控制金属钛加入后至钢水浇铸完成的时间,按照＂高温出炉、低温浇铸＂的原则,根据产品结构,配合适当的壳模焙烧温度和壳模出炉时间,生产出了外观质量较高的ZG1Cr18Ni9Ti硅溶胶熔模精密铸造零件.     

抗气蚀材料的设计与涂层工艺研究

设计了P1731、P1732、P34213种抗气蚀涂层材料，采用等离子喷焊工艺在921钢基体上制备焊层．与1Cr18Ni9Ti、921钢在配制的人工海水中进行振动空蚀试验。结果表明：3种涂层材料均比1Cr18Ni9Ti、921钢抗空蚀能力提高3倍以上。同时对其中2种材料的成分组成、结构特点、SEM形貌、电极电位等方面进行分析，总结了抗气蚀涂层材料优异的抗空蚀性能。     

An active control study of the 1Cr18Ni9 steel plate multipoint excitation

A multipoint excitation experiment system of the 1Cr18Ni9 steel plate-pipe network as the main vibration body was established,which used transient flow produced by the wave exciter to excite the 1Cr18Ni9 steel plate-pipe network to vibrate.The experimental results show that the 1Cr18Ni9 steel plate vibrates in three dimensions.The vibrations of the particles of the steel plate distributing along the pipe’s axial have phase differences and take place near the cylinder side first.Therefore,it is a multipoint vibration mode.The amplitude of the 1Cr18Ni9 steel plate increases as the system pressure increases and decreases as the wave exciter’s frequency decreases.The vibration intensity of the particles of the 1Cr18Ni9 steel plate close to the cylinder is the strongest and the amplitude is the highest in Y direction at a given system frequency.The vibration intensity of the particles close to the wave exciter is the strongest and the amplitude is the smallest in Z direction at a given system pressure.     

Investigation on the explosive welding mechanism of corrosion-resisting alu-minum and stainless steel tubes through finite element simulation and experi-ments

To solve the difficulty in the explosive welding of corrosion-resistant aluminum and stainless steel tubes, three technologies were proposed after investigating the forming mechanism through experiments. Then, a 3D finite element model was established for systematic simulations in the parameter determination. The results show that the transition-layer approach, the coaxial initial assembly of tubes with the top-center-point the detonation, and the systematic study by numerical modeling are the key technologies to make the explosive welding of LF6 aluminum alloy and 1Cr18Ni9Ti stainless steel tubes feasible. Numerical simulation shows that radial contraction and slope collision through continuous local plastic deformation are necessary for the good bonding of tubes. Stand-off distances between tubes (D1 and D2) and explosives amount (R) have effect on the plastic deformation, moving velocity, and bonding of tubes. D1 of 1 mm, D2 of 2 mm, and R of 2/3 are suitable for the explosive welding of LF6-L2-1Cr18Ni9Ti three-layer tubes. The plastic strain and moving velocity of the flyer tubes in-crease with the increase of stand-off distance. More explosives (R2/3) result in the asymmetrical distribution of plastic strain and non-bonding at the end of detonation on the tubes.