简介：本文从18-8型不锈钢弯头的模压成型加工过程和不锈钢银焊钎接发生的试压泄露事件中,分析了泄露原因,指出了防止18-8型不锈钢晶间腐蚀、加工应力腐蚀的措施,可作为今后类似加工工艺的借鉴。图1。

简介：连铸1Cr18Ni9Ti由于TiN夹杂导致扒皮率高,工艺难以控制。通过几年的技术攻关,严格控制AOD精炼参数,采用吹氩喂丝新技术以及连铸无氧化保护浇注、加厚铸坯等措施,有效地解决了连铸坯表面质量问题,产品性能良好,为太钢连铸优势的发挥奠定了基础。

简介：阐述了影响1Cr18Ni9Ti管坯热穿孔工艺性能的因素,剖析了不锈钢荒管产生内折和纵裂的原因,提出了防止上述缺陷的措施。

简介：本文采用前向多层误差反向传播(BP)网络的方法处理数据,建立了1Cr18Ni9Ti热镦粗过程工艺参数与组织、性能之间的网络预报模型,成功地实现了1Cr18Ni9Ti热镦粗过程的锻造性能预报.

简介：试验了王水溶样，高氯酸氧化分别测定G13Cr4M04Ni4V钢中Cr、V、Mn的分析方法。该方法操作简便、快速，能够满足分析要求。

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简介：研究结果表明，1Cr18Ni9Ti不锈钢在pH=1的酸性NaCl溶液介质中浸泡最初期，噪声电流曲线无噪声峰，噪声电阻大，电化学阻抗谱为一容抗弧，阻抗模值大，电极表面处于稳定状态。浸泡24h噪声电流曲线出现尖峰波动，但波动峰值只有几个微安，噪声电阻直线下降，阻抗谱高频部分为一容抗弧，低频下出现感抗特征，阻抗模值大幅度下降表面处于点蚀诱导期的亚稳状态。浸泡48h后，噪声电流波动峰值突然增大至100μA，噪声峰也增多，噪声电阻基本稳定，阻抗谱低频下的感抗成分消失，点蚀进入稳定发展阶段。动电位极化曲线与电化学噪声测试结果表明，1Cr18Ni9Ti不锈钢在pH=1的酸性NaCl溶液介质中的耐点蚀性能随浸泡时问延长而降低。

简介：太原钢铁集团公司和成都无缝钢管公司双方利用各自装备优势，通过合作解决了生产大口径不锈钢冷拔无缝钢管的关键－大型不锈钢管坯和热穿孔。详细介绍了Φ１８０×１５冷拔不锈钢无缝管的管坯制造、热穿孔、冷拔（扩）、热处理等生产工艺和产品的良好市场前景。

简介：PrecipitationstudywascarriedoutinNi-35at.pctCralloybymeasuringelectricalresistivityatdifferentageingtemperaturesandlongageingtimes.Duringageing,itwasobservedthatelectricalresistivityinitiallyrosewithageingtimeandthenfellafterverylongageingataconstanttemperature.TheinitialincreaseinresistivityduringageingmaybeattributedtotheformationofGPzones/Cr-richprecipitatesatearlystagesbynucleationprocessanddecreaseinresistivity,andafterattainingamaximum,isduetothegrowthofprecipitateparticlesandsubsequentlybycoarseningoftheseprecipitates.TheresultsofelectricalresistivitymeasurementsduringageingwereconfirmedbyX-raydiffractionanalysisindicatingtheformationofaCr-richphaseandaCr3Ni2phaseintheNimatrix.

简介：介绍不锈管坯钢０Ｃｒ１８Ｎｉ１２Ｍｏ２Ｔｉ的冶炼和加工工艺并作了分析探讨。检验分析了该钢的化学成份，显微组织和夹杂物等，结果表明，太钢生产的不锈管坯钢０Ｃｒ１８Ｎｉ１２Ｍｏ２Ｔｉ完全能够达到技术条件的要求，说明现行的生产工艺是可行的。

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简介：探讨了在大生产条件下4Cr5MoSiV1钢的脱碳层测定原则。结果表明,金相法测定结果较准确且操作简便

简介：Co,Ni,CrandVin25typicalsoilsofChinawerefractionatedintoexchangeable,carbonatebound(calcareoussoils),Mnoxidebound,organicallybound,amorphousFeoxidebound,crystallineFeoxideboundandresidualformsusingaseven-stepsequentialextractionprocedure,soastostudythedistributionofchemicalformsofthesemetalsaswellastheeffectsofsoilproipertiesonthedistribution.TheresultsshowedthatmostofsoilCo,Ni,CrandVwerepresentinresidualforms,andthedistributionratioaveraged48.2%forCo,53.0%forNi,81.5%forCrand68.7%forV.Thespeciationofheavymetalswasgreatlyinfluencedbysoilphysico-chemicalpropertiesandthechemistryofelements.Theresultsalsoindicatedthattherecoveryofmetalelementsbythesequentialextractionprocedurewassatisfactory,withtherelativedifferencebetweenthesumofsevenformsandthetotalcontentinsoilsaveraging9.5%forCo,12.8%forNi,6.6%forCrand7.2%forV.

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简介：TheinvestigationonopticalpropertiesofSi1-xGex/Sistrainedlayerstructureshasbeencarriedoutactivelyinrecentyears.Thephotoluminescencehasbe-comeabriskersubjectinthestudiesofitsvariousopticalproperties.Aresearchdevelop-menttophotoluminescencepropertiesofsomenewSi1-xGex/Sistrainedlayerstruc-turesisintroduced.

简介：Ni-Cr-Mo合金经冷压成型后于真空中以不同温度进行烧结.通过测定其相对密度、线收缩率、拉伸强度和硬度,研究烧结温度对合金性能的影响.研究结果表明:当烧结温度不超过1330℃时,合金的相对密度、收缩率、拉伸强度和硬度随烧结温度的上升而缓慢增加;当温度上升到1360℃时,合金的这些性能指标急剧增大;当温度上升到1390℃时,烧结后的合金试样外形发生严重变形.

简介：UsingdoublecrystalX-raysdiffraction(DCXRD)andatomicforcemicroscopy(AFM),theresultsofGexSi1-xgrownUHV/CVDfromSi2H6andSiH4areanalyzedandcompared.Adsorbatescanmigratetotheenergy-favoringpositionduetotheslowgrowthratefromSiH4.Inthiscase,aSibufferthatisolatestheeffectofsubstrateonepilayercouldnotbegrown,whichresultsinapitpenetratingintoepilayerandbuffer.TheFWHMis0.055°inDCXRDfromSiH4.Thepresenceofdiffractionfringesisanindicationofanexcellentcrystallinequality,TheroughnessofthesurfaceisimprovedifgrownbySi2H6:however,thecrystalqualityoftheGex2Si1-xmaterialbecameworsethanthatfromSiH4duetomuchlargergrowthratefromSi2H6.ThecontentofGeisobtainedfromDCXRD,whichindicatesthegrowthratefromSi2H6islargest,thenGeH4andthatfromSiH4isleast.

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简介：Theeffectofnonmetallicinclusionsinthedropletofthestainlesssteelcoveredelectrodeontheporositywasresearched.Theresultshowsthatthenonmetallicinclusionsinthedropletarespherical,theircompositionisdifferentfromtheoneofslagandtheinclusionshavethecharacterof"innerformation".Whentheratioofrutiletoilmeniteinthecoatedmaterialisincreased,thedropletbecomescoarse,thecontentofnonmetallicinclusioninthedropletdecreases,andtheporositysensitivityintheweldmetalalsodecreases.Whentheratiooffledspartoilmeniteinthecoatedmaterialisincreased,thedropletbecomesfine,thecontentofnonmetallicinclusioninthedropletincreases,andtheporositysensitivityintheweldmetalincreases.WhentheratioofFe2O3toilmeniteinthecoatedmaterialisincreased,thedropletbecomesfine,thecontentofnonmetallicinclusiondecreases,whiletheporositysensitivitydoesnotreduce.