双相不锈钢在H_2SO_4＋NaCl介质中的腐蚀磨损

测定了α＋γ双相不锈钢在Ｈ２ＳＯ４及Ｈ２ＳＯ４＋ＮａＣｌ介质中的腐蚀率、磨损率、腐蚀磨损率和钝化膜破坏后的修复时间，研究了磨损表面的硬度变化及摩擦系数的变化规律，观察了磨痕及磨屑形貌等．实验表明氯离子对双相不锈钢腐蚀磨损的影响与磨损表面的脆性剥落有关．     

双相不锈钢在H2SO4＋NaCI介质中的腐蚀磨损

测定了α γ双相不锈钢在H2SO4及H2SO4＋NaCI介质中的腐蚀率、磨损率、腐蚀磨损率和钝化膜破坏后的修复时间，研究了磨损表面的硬度变化以及摩擦系数的变化规律，观察了磨痕及磨屑形貌等，实验表明氯离子对双相不锈钢腐蚀磨损的影响与磨损表面的脆性剥落有关。     

一种双相不锈钢热处理工艺的优化

对一种双相不锈钢设计并进行了不同的热处理,研究了不同热处理后双相不锈钢的组织、相结构、硬度及在几种腐蚀介质中的腐蚀特性.结果表明:提高固溶温度可略提高双相不锈钢的硬度而基本不影响其耐蚀性;固溶后时效使δ相中析出σ相,一些δ相转变为γ相,钢的硬度显著增加.阳极极化实验表明时效后双相不锈钢的耐蚀性较固溶态降低,降低程度与腐蚀介质有关;在1 mol/L NaCl中,时效后双相不锈钢的耐蚀性剧烈降低;但时效对双相不锈钢在0.2 mol/L H2SO4与1 mol/L H3PO4中的钝化区基本无影响.由于材料的腐蚀磨损抗力与其耐蚀和耐磨能力均有关,因此在一定服役条件下,可以通过时效适当提高双相不锈钢的硬度来提高其腐蚀磨损抗力.     

固溶处理温度对双相不锈钢在硫酸介质中腐蚀磨损行为的影响

采用销环式腐蚀磨损试验机研究了固溶处理的双相不锈钢在１０％Ｈ２ＳＯ４中的腐蚀磨损行为．腐蚀磨损率－载荷关系曲线表明：较高温度固溶的双相不锈钢在低载荷下的耐腐蚀磨损性比低温固溶的优，而在高载荷下却恰恰相反；阴极保护下（－６００ｍＶ，ＳＣＥ）具有同样的关系．扫描电镜观察证实，高温固溶处理产生大量铁素体而导致高载下出现脆性剥落是其耐腐蚀磨损性变坏的原因．     

固溶处理温度对双相不锈钢在硫酸介质中腐蚀磨损行为的影响SCIEI

采用销环式腐蚀磨损试验机研究了固溶处理的双相不锈钢在１０％Ｈ２ＳＯ４中的腐蚀磨损行为．腐蚀磨损率－载荷关系曲线表明：较高温度固溶的双相不锈钢在低载荷下的耐腐蚀磨损性比低温固溶的优，而在高载荷下却恰恰相反；阴极保护下（－６００ｍＶ，ＳＣＥ）具有同样的关系．扫描电镜观察证实，高温固溶处理产生大量铁素体而导致高载下出现脆性剥落是其耐腐蚀磨损性变坏的原因．     

双相不锈钢的磨损腐蚀与空泡腐蚀研究进展

介绍了双相不锈钢在流动介质中的磨损腐蚀和空泡腐蚀的研究状况和它的腐蚀机理,分析了当前在这方面研究的成果和进展,认为需要进一步研究二者的交互作用以及腐蚀过程中化学腐蚀与力学损伤的交互作用。     

不锈钢在H3PO4＋NaCl溶液中腐蚀磨损的交互作用

用销环式腐蚀磨损试验机测定了双相不锈钢在含Cl的磷酸溶液中的腐蚀磨损-载荷曲线以及磨损过程中的阳极极化曲线观察了磨痕、磨屑形貌以及磨损前后硬度变化表明Cl在磨损过程中促使磨损表面变脆,发生脆性撕裂,从而加速了材料的流失.     

三种不锈钢在含硫酸的水砂介质中的耐腐蚀磨损性能

利用自行设计的腐蚀磨损试验装置研究了三种不锈钢在不同固液比、硫酸浓度和线速度的条件下的耐腐蚀磨损性能；结果表明，在低硫酸浓度、高固液比和高线速度的条件下，沉淀硬化马氏体不锈钢具有良好的耐腐蚀磨损性能：而在腐蚀性较强、线速度较大的条件下，双相不锈钢的耐腐蚀磨损性能优于沉淀硬化马氏体不锈钢和奥氏体不锈钢；第二相强化奥氏体不锈钢在腐蚀性较强、耐磨性较弱的环境中耐腐蚀磨损性能较好。     

微电化学技术研究双相不锈钢优选腐蚀行为

利用自制的微参比电极定点测量了双相不锈钢中铁素体相与奥氏体相在NaCl水溶液中的腐蚀电位差异,并建立了微电化学测量系统,在HNO3和FeCl3混合溶液中对双相不锈钢铁素体和奥氏体相分别进行电化学行为和腐蚀差异性的研究．实验表明,铁素体相电位比奥氏体相电位低．微电化学技术的研究结果能够解释双相不锈钢宏观的优选腐蚀行为,有利于进一步深化对双相不锈钢的优选腐蚀机理的认识．     

CrMnN双相不锈钢的空泡腐蚀行为研究

利用磁致伸缩空蚀实验机研究了CrMnN双相不锈钢在3％NaCl溶液中的空蚀行为，采用电化学技术测量了静态和空蚀条件下的自腐蚀电位变化和动电位扫描极化曲线．利用扫描电镜(SEM)跟踪观测了试样表面的空蚀形貌．结果表明：CrMnN双相不锈钢的抗空蚀性能优于水轮机的常规用材0Crl3Ni5Mo．CrMnN双相不锈钢的空蚀破坏首先在铁素体相发生．铁素体相的失效方式为脆性失效，而奥氏体相是延性失效．奥氏体相区由滑移和孪生引起的塑性变形消耗了空泡溃灭产生的冲击能量，从而提高CrMnN双相不锈钢的抗空蚀性能．在NaCl溶液中。空蚀使CrMnN不锈钢的自腐蚀电位负移300mV，阳极电流密度增大近3个数量级，但由NaCl引起的失重量对总失重量的贡献很小．     

碳氮离子注入奥氏体不锈钢改性研究

用日立S-3000N型扫描电镜，原位纳米力学测试系统（TRIBOINDENTER），原位轮廓同步磨损试验机和CH1660A电化学工作站对离子注入奥氏体不锈钢的组织及耐磨性，耐腐蚀性进行了较深入的探讨，研究结果表明，离子注入可以在不降低甚至提高奥氏体不锈钢耐腐蚀性的情况下大大改善其耐磨性。     

CD—4MCu合金在磷酸介质中的腐蚀磨损行为

测定了CD—4MCu合金在69％H_3PO_4,69％H_3PO_4+500ppm NaCl介质中的腐蚀率、腐蚀磨损—载荷关系及摩擦系数,还用SEM观察了磨痕,实验表明它的耐腐蚀磨损性能优于一般的304不锈钢和高耐蚀的Carpenter20Cb3合金,从CD—4MCu合金双相组织特点可知其中低Ni的面心立方γ相有较高的抗磨损能力。     

CORROSIVE WEAR BEHAVIOUR OF ALLOY CD-4MCu IN PHOSP(?)ORIC ACID

The corrosion rate,together with corrosive wear and corrosion coefficient under load,ofalloy CD-4MCu in 69% H_3PO_4 or 69% H_3PO_4+500 ppm NaCl solution measured,andthe morphology of their wear tracks was then observed by SEM.The alloy CD-4MCu isrevealed to be superior in corrosive wear resistance to stainless steel 304 and even toCarpenter 20Cb3,a high corrosion resisting alloy.From its features of duplex phasestructure,it could be suggested that the weight loss related to mechanical factor wasimproved by existence of austenitic phase due to its deformation strengthening.     

304奥氏体不锈钢氮离子注入层的组织与性能研究

对具有抗磁性的304奥氏体不锈钢进行离子渗氮处理,以提高其硬度和耐磨性.研究了奥氏体不锈钢渗氮前后的金相组织、显微硬度、耐磨性和耐腐蚀性等,并与常用高硬度、高耐磨性GCr15钢进行了对比.结果表明:304奥氏体不锈钢通过一定时间的离子渗氮后,依然具有很好的抗磁性能,且表层硬度约为基体硬度的6倍,耐磨性能大大提高,其性能...     

Plasma Nitriding of Austenitic Stainless Steel with Severe Surface Deformation Layer

The dc glow discharge plasma nitriding of austenite stainless steel with severe surface deformation layer is used to produce much thicker surface modified layer. This kind of layers has useful properties such as a high surface hardness of about 1500 Hv 0.1 and high resistance to frictional wear. This paper presents the structures and properties of low temperature plasma nitrided austenitic stainless steel with severe surface deformation layer.     

几种金属材料的腐蚀磨损研究

<正> 腐蚀磨损是指摩擦过程中材料与介质发生化学或电化学反应并产生材料流失的磨损现象。在侵蚀性介质中工作的摩擦副如各类泵及阀门的密封面等部件往往因腐蚀及磨损的双重作用而过早失效,因此这类问题很受人们重视。 Uhlig对腐蚀与微动损伤的相互作用进行过讨论。等对某些高合金钢的府蚀磨损性能作过较系统的评价,并建立了实验设备。欲了解材料的腐蚀磨损性能,除了要弄清楚它在介质中的化学及电化学行为外,还要了解受机械力作用时材料表面或表面膜的变形及流失过程。更主要的是两者间的关系。因此,Kim及Bhattacharyya研究了不锈钢在NaCl介质中磨损及摩擦参数对电化学行为的影响。为了研究腐蚀磨损的瞬态过程而建立物     

Wear behavior of Al2O3-TiCN composite ceramic sliding on stainless steel

It is well known that austenitic stainless steel AISI302 is relatively difficult to cut. In order to investigate the wear behavior of Al₂O₃-TiCN composite ceramic when machining austenitic stainless steels, a blockon-ring tribometer was used to simulate a real machining process. The test results showed that the wear of both the ceramic and the stainless steel increased rapidly with increasing load and speed. The boundary lubrication actions of water and oil used in this test could not reduce the wear of the rubbing materials. Scanning electron microscopy and energy-dispersive x-ray spectroscopy analyses identified material transferred between the ceramic and the stainless steel surfaces in rubbing process. On the one hand, stainless steel transferred on the ceramic surface because of adhesion; on the other, some ceramic fragments caused by microfracture of the ceramic were found to be embedded in the worn stainless steel surface. The wear of Al₂O₃-TiCN ceramic sliding against stainless steel was caused primarily by adhesion between the rubbing surfaces and the microfracture of the ceramic.     

激光熔覆Mo2Ni3Si／NiSi金属硅化物复合材料涂层组织与耐磨性

以39Mo-35Ni-26Si(w％)合金粉末为原料，采用激光熔覆技术，在1Cr18Ni9Ti不锈钢基材表面翩得以Mo2Ni3Si金属硅化物为初生相，以Mo2Ni3Si／NiSi共晶相为基体的金属硅化物耐磨复合材料涂层。涂层的常温干滑动磨损试验结果表明，在磨损过程中，Mo2Ni3Si／NiSi共晶相轻微地优先磨损，Mo2Ni3Si金属硅化物微微凸出于磨损表面，起到抗磨的骨干作用。由于Mo2Ni3Si金属硅化物具有很高的硬度和很强的原子间键合力，在磨损过程中难于变形和粘着，激光熔覆Mo2Ni3Si／NiSi金属硅化物复合材料涂层具有优异的耐磨性，与1Cr18Ni9Ti标样相比，涂层的耐磨性提高了56倍。     

离子氮化对2Cr13钢冲蚀磨损性能的影响

对2Cr13不锈钢离子氮化后的冲蚀磨损性能进行试验研究，结果表明，离子氮化后，表面硬度的大幅度提高是其冲蚀磨损抗力显著提高的主要原因。     

Hard AlTiN, AlCrN PVD coatings for machining of austenitic stainless steel

The austenitic stainless steels in general are considered to be difficult to machine materials. This is mainly due to the high plasticity and tendency to work-harden of the austenitic stainless steel, which usually results in severe cutting conditions. Additionally, austenitic stainless steels have much lower thermal conductivity as compared to structural carbon steels; this inflicts high thermal impact within the chip-tool contact zone, which significantly increase the cutting tool wear rate. The machineability of austenitic stainless steels can be improved due to application of coated cutting tools. Hard PVD coating with low thermal conductivity and improved surface finish should be used in this case. This can result in enhancement of frictional characteristics at the tool/workpiece interface as well as chip evacuation process. In this study the stainless steel plates were machined using cemented carbide finishing end mills with four high aluminum containing PVD coatings namely: AlCrN, AlCrNbN, fine grained (fg) AlTiN and nano-crystalline (nc) AlTiN. Both AlTiN and AlCrN-based coatings have high oxidation resistances due to formation of aluminum oxide surface layers. The influence of surface post-deposition treatment on tool wear intensity was investigated. The coating surface texture before and after post-deposition treatment was analyzed by means of the Abbot-Firestone ratio curves. Minimal wear intensity after length of cut 150 m was achieved for cutting tools with the nc-AlTiN coating.