普通雨量器降水量观测误差分析

本文对使用普通雨量器观测降水量过程中引起降水量误差来源进行了分析。依据SL21-90《降水量观测规范》的有关规定,根据实际工作经验,总结了在使用普通雨量器观测降水量产生误差的消除方法,对基层测站的实际工作具有一定的参考价值。     

SAF2205双相不锈钢焊接工艺研究

研究了双相不锈钢2205在不同焊接工艺时接头的组织和性能.结果表明:焊条电弧焊接头抗拉强度较高;钨极氩弧焊接头组织中奥氏体相占优势,具有较好的低温冲击能性;两种接头的抗点蚀性能相当.     

微机控制工业电视子系统在漳村煤矿的应用

先进的微机控制工业电视子系统在漳村煤矿得到应用。文章介绍了系统的组成、功能、原理及主要技术指标。     

Effect of Cl~- Concentration on the Corrosion Behavior of 16Mn Steel in Saturated H_2S/CO_2 Solution

The corrosion behavior of 16Mn steel was studied in saturated H_2S or H_2S/CO_2 solutions containing different Cl~-concentrations at 80℃.The microstructure and chemical composition of the corrosion products were investigated through scanning electron microscopy,energy-dispersive X-ray spectroscopy,EPMA,and X-ray diffraction.Results showed that the corrosion rate decreased with increasing Cl~-concentration in saturated H_2S or H_2S/CO_2 solution at pH 4.Conversely,the corrosion rate increased with increasing Cl~-concentration in saturated H_2S solution at pH 6.The relative H~+concentration decreased because of the increase of Cl~-concentration at pH 4,and Cl~-acted as a catalyst in the corrosive medium at pH 6 because the net H~+concentration decreased obviously compared with the condition at pH4.Cl~-promoted the formation of Fe-deficient iron sulfide at pH 4,and the opposite effect was observed in the nearly neutral solution.The corrosion rate increased firstly with increasing Cl~-concentration and then decreased in the saturated H_2S/CO_2solution at pH 6.The corrosion products were mainly composed of two kinds of iron sulfide.Sulfide FeS_(1-x) was a kind of tetragonal crystal,whereas the other was the hexagonal/monoclinic iron sulfide Fe_(1-x)S.The corrosion film that was mainly composed of FeS_(1-x) did not confer a protective effect on the base metal.The atomic ratio of Fe/S was more than 1 for FeS_(1-x).The appearance of sulfide FeS_(1-x) resembled a square block or small,needlelike,flocculent particles.The atomic ratio of Fe/S was less than 1 for Fe_(1-x)S,and the corrosion film mainly composed of Fe_(1-x)S conferred some protective property on the base metal.The sulfide FeS_(1-x) exhibited a long claviform morphology with a hexagonal or quadrilateral cross-sectional shape.     

某气田增压站压缩机组噪声治理效果分析

针对川东地区大多数增压场站存在的厂界噪声超标问题,以某气田增压站为例,从生产设备、厂界范围入手,分析了压缩机组噪声超标点位,提出了噪声超标治理方案。经现场改造后,噪声排放满足GB 12348—2008《工业企业厂界环境噪声排放标准》二类昼间≤60 dB（A）,夜间≤50 dB（A）的要求。该压缩机组 降噪治理应用有效降低了噪声水平,符合国家环保政策,为气田后期开发提供参考。     

高性能铜材的研究近况

叙述高性能铜材的强化原理、分类及制备工艺，并对其发展前景作了阐述。     

由于电源故障导致主机不能启动一例

故障现象:开机后不自检,风扇和指示灯正常。 故障分析及解决:第一次遇到这种故障,首先想到的是主板损坏,要测试主板就得把主板换到别的机子上,费时费力,万不得已再走这条路。想来想去,只好从电源开刀,借来万用表检测连接到各个系统扩展槽上电源的四组电压(正常应分别为:+5伏、+12     

Ni-WB2复合熔覆层的微观组织及摩擦磨损性能

利用真空熔覆技术在45钢表面制备了Ni-WB₂复合熔覆层,利用SEM、EDS、XRD等分析其组织特征,利用销盘式摩擦试验机对其摩擦磨损性能进行了测试与分析。结果表明,Ni-WB₂复合熔覆层组织致密并与基体呈牢固的冶金熔合,熔覆层具有特殊的分层结构,分为网状结构层、过渡结构层和扩散熔合层,网状复合区又分为网状Ⅰ区和网状Ⅱ区。扩散区主要由铁基固溶体和镍基固溶体构成,过渡区的主要组成相为γ-Ni及Cr的碳化物,网状复合区的主要组成相有镍基合金、铬碳化物、WB₂、镍硅共晶以及WB₂与镍基合金中的元素形成的复杂硼化物和碳化物。当WB₂含量低于20%时,随着WB₂在复合熔覆层中含量的增加,其磨损率及摩擦因数均逐渐降低,当WB₂含量为15%时,Ni-WB₂复合熔覆层的磨损率及摩擦因数与基体相比,分别降低了48.94%与14.62%。网状分布的硬质相在摩擦过程中起到支撑载荷的作用,摩擦磨损过程中形成了WO_x...