热处理对高强软磁不锈钢0Cr13Ni4Mo性能的影响

研究了高强软磁不锈钢０Ｃｒ１３Ｎｉ４Ｍｏ在不同热处理状态下，钢的电磁性能、力学性能、电化学性能的变化。研究结果表明：０Ｃｒ１３ＮｉＭｏ钢通过１０００℃固溶处理，再经５８０℃回火，控制钢中逆变奥氏体在７％￣９％之间，可获得电磁性能，力学性能，耐蚀性能皆优的高强软磁不锈钢。     

Ni－P涂层在泥浆中冲蚀－腐蚀行为研究

在浆料罐系统中研究了Ｎｉ－Ｐ涂层的泥浆冲蚀－腐蚀行为．Ｎｉ－Ｐ涂层抵抗泥浆冲蚀－腐蚀的能力大大高于马氏体不锈钢２Ｃｒ１３和奥氏体不锈钢１Ｃｒ１８Ｎｉ９Ｔｉ，扫描电镜分析表明，在线速度为６．２ｍ／ｓ时，２．５小时后Ｎｉ－Ｐ涂层表面轻微擦伤，在１１．１ｍ／ｓ时，０．５小时后，表面为切削特征，运行不到１５小时表面严重剥落。     

抗菌不锈钢“NSS AM系列”

近年来不论是食品业和医疗界还是一般家庭，都对卫生防菌意识日益提高，因此，市场对于抗菌制品的需求不断增长，抗菌材料的开发受到重视。人们首先发现在不锈钢中添加大量Ｃｕ时便可显示出有效的抗菌效力，从而开发成功兼备制造加工性和抗菌性的铁素体系抗菌不锈钢（低Ｃ、Ｎ－１７％Ｃｒ－１．５％Ｃｕ）。随着抗菌不锈钢需求的不断增长和应用范围的日益扩大，又相继开发成功了马氏体系抗菌不锈钢（０．３％Ｃ－１３％Ｃｒ－３％Ｃｕ）和奥氏体系抗菌不锈钢（１８％Ｃｒ－９％Ｎｉ－３．８％Ｃｕ）．在不同钢种中所含Ｃｕ量也不同，是因为…     

管道管用马氏体不锈钢无缝钢管的开发

开发了在ＣＯ２环境下使用的０．０１Ｃ－１１Ｃｒ－１．５Ｎｉ－０．５Ｃｕ－０．０１Ｎ及在ＣＯ２＋微量Ｈ２Ｓ环境下使用的０．０１Ｃ－１２Ｃｒ－５Ｎｉ－２Ｍｏ－０．０１Ｎ管道管用马氏体不锈钢无缝钢管。该两种钢管的强度都是Ｘ８０级,夏氏冲击值在１００Ｊ（－４０℃,焊接状态）以上,具有无需预热及焊后不作处理也不会产生裂纹的优异焊接性能。指出ＣＯ２环境用１１Ｃｒ钢比０．２Ｃ－１３Ｃｒ钢具有更优异的耐ＣＯ２腐蚀性能,并显示了ＣＯ２＋微量Ｈ２Ｓ环境用１２Ｃｒ钢管在１０％ＮａＣｌ水溶液、ｐＨ４．０,０．００２ＭＰａＨ２Ｓ条件下的耐ＳＳＣ性能。此类钢管适于替代过去输送管道管使用的靠腐蚀抑制剂防腐的管材,以及双相不锈钢等高价耐蚀材料。     

5CrMnMo钢渗碳特性的研究

研究了渗碳温度、炉气碳势对５ＣｒＭｎＭｏ试样渗碳层深，表面碳量的影响以及层深，表面碳量对钢的性能影响，试验表明，５ＣｒＭｎＭｏ钢具有良好的渗碳特性，其最佳渗层深度０．８－１．２ｍｍ，表面碳量应控制在０．８％－１．０％范围，可获得适用于冷镦模具的最佳力学性能。     

马氏体不锈钢1Cr13的焊接及应用

马氏体不锈钢１Ｃｒ１３的焊接及应用傅茂均山东第二轻工机械厂（２５２０５９）１Ｃｒ１３不锈钢在３０℃以下时在弱腐蚀性介质中，在大气、蒸汽、淡水中亦具有良好的耐腐蚀性能，因而在轻工机械和造纸设备中得到广泛的应用。１焊接性分析１Ｃｒ１３不锈钢焊按性较差，因...     

Cr12钢马氏体－贝氏体复合组织的力学性能

研究了Ｃｒ１２钢经９８０℃奥氏体化后，于２８０℃硝盐中等温不同时间获得不同比例的马氏体－贝氏体复合组织与力学性能的关系，并与常规淬火、回火后的力学性能进行了比较．结果表明：具有马氏体－贝氏体复合组织的Ｃｒｌ２钢与常规淬火、回火的回火马氏体组织相比，除硬度有所降低外，抗弯强度、挠度、冲击韧性及耐磨性均有较大幅度的提高．经９８０℃加热、２８０℃等温５ｈ、１８０℃回火后，Ｃｒ１２钢具有最佳的综合力学性能．     

文摘

文摘９６０１０１耐酸高耐蚀１３Ｃｒ油井钢管开发之－（材质设计和实机轧制结果）［刊，日］／川上哲…／／材料─１９９５，３（８）为提高油井管耐ＣＯ２等腐蚀性能，日本新日铁公司已研制出改进型１３Ｃｒ不锈钢（０．０２％Ｃ－２％Ｎｉ－１３％Ｏ－０．０６％Ｎ），...     

回火工艺对4Cr13钢耐蚀性能的影响

回火工艺对４Ｃｒ１３钢耐蚀性能的影响哈尔滨量具刃具厂（哈尔滨１５００４０）王滨生，杨金英，刘全文，金汉红４Ｃｒ１３不锈钢是马氏体不锈钢，退火状态的耐蚀性能较差。其原因是钢中存在大量的碳化物，不仅使固溶体中的铬含量降低，并且由于在碳化铬颗粒与基体之间会...     

淬火介质SST101在调质钢及轴承钢热处理中的应用

本文研究了调质钢４０Ｃｒ，３５ＣｒＭｏ和轴承钢ＧＣｒ１５在淬火介质ＳＳＴ１０１中淬火后的淬透性、变表开裂性及４０Ｃｒ的力学性能。实验结果表明：适当调整ＳＳＴ１０１的浓度，可以获得不同的冷却速度；适合调质钢４０Ｃｒ，３５ＣｒＭｏ及轴承钢ＧＣｒ１５的淬火液的最佳浓度分别为１．０％－１．５％和１．５％－２．０％。     

High-Power Diode Laser-Treated 13Cr4Ni Stainless Steel for Hydro Turbines

The cast martensitic chromium nickel stainless steels such as 13Cr4Ni, 16Cr5Ni, and 17Cr4Ni PH have found wide application in hydro turbines. These steels have adequate corrosion resistance with good mechanical properties because of chromium content of more than 12%. The 13Cr4Ni stainless steel is most widely used among these steels; however, lacks silt, cavitation, and water impingement erosion resistances (SER, CER, and WIER). This article deals with characterizing 13Cr4Ni stainless steel for silt, cavitation, and water impingement erosion; and studying its improved SER, CER, and WIER behavior after high-power diode laser (HPDL) surface treatment. The WIER and CER have improved significantly after laser treatment, whereas there is a marginal improvement in SER. The main reason for improved WIER and CER is due to its increased surface hardness and formation of fine-grained microstructure after HPDL surface treatment. CER and WIER of HPDL-treated 13Cr4Ni stainless steel samples have been evaluated as per ASTM G32-2003 and ASTM G73-1978, respectively; and these were correlated with microstructure and mechanical properties such as ultimate tensile strength, modified ultimate resilience, and microhardness. The erosion damage mechanism, compared on the basis of scanning electron micrographs and mechanical properties, is discussed and reported in this article.     

Effect of Ni and Mn on the Mechanical Properties of 22Cr Microduplex Stainless Steel

The tensile properties of 22Cr–2Ni–4Mn–0.2N micro-duplex stainless steels with different Ni and Mn contents were investigated. Duplex stainless steels were vacuum induction melted and hot rolled, then annealed at 1,000–1,100 °C, at which temperature both the austenite and ferrite phases were stable. The volume fraction of the ferrite phase was markedly affected by the alloying elements of Mn and Ni; 1 wt% of Mn was equivalent to 0.4 wt% of Ni. All of the steels tested at room temperature showed the common strain-hardening behavior, while the steels tested at lower temperatures(-30 or-50 °C)showed a distinct inflection point in their stress–strain curves, which resulted from the transformation of the austenite to straininduced martensite. The onset strain(e0) of the inflection point in the stress–strain curve depended on the Md30 value of the steel. Testing at lower temperatures resulted in smaller e0 and consequently higher strengths and fracture strains(ef). The tensile behavior was examined from the perspective of austenite stability of the micro-duplex stainless steels with the different Ni and Mn contents.     

The resistance to cavitation erosion of CrMnN stainless steels

The resistance to cavitation erosion (CE) was measured using a magnetostrictive device and a rotating disk device for some CrMnN stainless steels (Chinese patent ZL 90 1 02197.0). The microstructural changes in the surface layer before and after CE were analyzed by use of Mossbauer spectra. Results show that the resistance to CE of duplex austenitic-martensitic CrMnN stainless steels is much better than that of ZG0Cr13Ni4-6Mo and ZG0Crl6Ni5Mo steel, which are in common use for hydraulic turbine runners. The metastable austenite and its changes in the process of CE are the key factors why the CrMnN stainless steels have excellent resistance to cavitation erosion.     

Advances in the research of nitrogen containing stainless steels

The current status of nitrogen containing stainless steels at home and aboard has been introduced. The function and existing forms of nitrogen in the stainless steels, influence of nitrogen on mechanical properties and anti-corrosion properties as well as the application of nitrogen containing cast stainless steels were discussed in this paper. It is clear that nitrogen will be a potential and important alloying element in stainless steels. And Argon Oxygen Decarbonization (AOD) refining can provide an advanced manufacture process for nitrogen containing stainless steels with ultra-low- carbon and high cleanliness.     

残留/逆转变奥氏体对改善高强度不锈钢-196℃超低温冲击性能的影响

采用力学性能测试、SEM和XRD等手段研究了淬火+低温回火处理的0Cr16Ni6高强度不锈钢和过时效处理的00Cr11Ni11MoTi马氏体时效不锈钢,并分析了残留/逆转变奥氏体对试验钢超低温缺口抗拉强度和冲击性能的影响.结果表明,在两种试验钢室温强韧性相近的情况下,0Cr16Ni6钢在超低温下(-196℃)的缺口抗拉...     

不锈钢在海水飞溅区的腐蚀行为

总结了5种不锈钢在青岛海域飞溅区暴露16年的腐蚀行为和 规律.2Cr13在飞溅区不能维持其表面的钝态,耐蚀性较差.含16%Cr以上的不锈钢在飞 溅区有较好的耐蚀性.1Cr18Ni9Ti、00Cr19Ni10和000Cr18Mo2在飞溅区暴露2～4年间,F179 在1、2年间,点蚀速度较大,此后它们的点蚀深度随时间无明显加深.不锈钢在飞溅区的点 蚀密度随暴露时间增大.增加Cr含量、添加Mo能提高不锈 钢在飞溅区的耐蚀性.     

1Cr18Ni9Ti与1Cr13不锈钢的焊接试验

通过钨极氩弧焊方法,对 1Cr18Ni9Ti 与 1Cr13 实施焊接.采用光学显微镜、扫描电镜对 1Cr13 马氏体型与 1Cr18Ni9Ti 奥氏体型不锈钢焊接接头进行金相组织、断口形貌观察及分析;利用显微硬度计、电子万能拉伸机测量焊接接头的力学性能;并通过海水模拟溶液浸泡试验,测量焊接接头极化曲线和交流阻抗谱.结果表明,通过手工钨极氩弧焊,采用直流正接接法,在合适的工艺下(焊接电流为 80 A,焊接速度为 110 mm/min),能够获得外观平整、组织均匀,力学性能与电化学性能符合要求的焊接接头.

Abstract：

The stainless steels of 1Cr18Ni9Ti and 1Cr13 were welded through deterministic craft by tungsten inert-gas (TIG) welding. The microstructure and fracture pattern of weld joints of 1Cr13martensite and 1Cr18Ni9Ti austenite stainless steels were observed and analyzed by means of LOM and SEM, the mechanical properties of the weld joints were measured with micro-hardness tester and electronic universal stretcher, and the polarization curves and AC impedance spectroscopy of weld joints were tested by seawater immersion test of simulation solution. The results show that adopting manual TIG welding through electrode negative to direct current soldering machine to weld 1Cr18Ni9Ti austenite stainless steel and 1Cr13 martensite stainless steel is feasible; under suitable process (welding current is 80 A, welding speed is 110 mm/min), weld joints can obtain good appearance and uniform structure; mechanical properties and galvano-chemistry properties can meet use requirements.     

A cast low carbon stainless steel for use in nitric acid at higher concentrations and temperatures

This paper introduces three modifications of cast, low carbon stainless steels with about 15 to 20% Cr, 13% Ni and 4.5 to 6.5% Si which can be used for pumps and valves in nitric acid plants. Mechanical and structural properties, castability, machinability and weldability are discussed to characterize the practical applicability of these alloys for producers and users of such cast components. Laboratory corrosion tests in boiling nitric acid between 50 and 98 wt% prove the superior resistance of the Si-bearing alloys in the 90% and 98% acid compared to standard CrNi-steels without Si. Comparative field tests with cast pump impellers and casings confirm the very good corrosion resistance of the Si-bearing alloys in highly concentrated nitric acid under service conditions.     

Cold cracking studies on low alloy steel weldments: effect of filler metal composition

Abstract

The resistance to hydrogen cracking of Cr - Mo, Ni - Cr - Mo and Si - Mn steels which are employed in armoured vehicle construction was evaluated under implant test conditions. Austenitic stainless steel filler (AWS E312), which is reported to be resistant to hydrogen assisted cracking, was used to study the cracking tendency of all the three steels. Four other fillers, namely a nickel based filler (ENiCrFe-3), a low carbon, low alloy steel, a mild steel (AWS E6013) and a matching filler for Cr - Mo, were employed to evaluate their relative cracking tendency. Cr - Mo and Ni - Cr - Mo steels exhibited high cracking tendency while Si - Mn steel was resistant to cracking with the E312 filler. Cr - Mo steel was resistant to cracking with the nickel based filler, the low carbon, low alloy steel and the matching filler. The observed cracking tendency of the steels is linked to a susceptible interface/fusion boundary microstructure.     

不锈钢的大气腐蚀研究—12年暴露试验总结

总结了５种不锈钢在我国７个试验点的１２年大气腐蚀试验结果,材料中包括了最常用的不锈钢,环境中包括了亚热带,温带,工业性,海洋性,干燥环境及湿热环境等各种典型环境。不锈钢在大气中是耐蚀的。当含Ｃｒ量达到１８％以上时耐蚀性很好,钼能明显提高不锈钢的耐蚀性,超低碳也能提高其耐蚀性。