09MnNiDR钢焊接试验研究

采用经验公式分析了09MnNiDR钢的焊接接头裂纹敏感性,研究了焊接工艺对焊接接头性能的影响。通过分析和斜Y型坡口焊接裂纹试验表明09MnNiDR具有良好的焊接性能,在室温条件焊接不会产生焊接冷裂纹。通过采用合理的焊接工艺,分别采用钨极氩弧焊、焊条电弧焊和埋弧焊焊接09MnNiDR钢,得到综合性能良好的焊接接头,能够满足工程需要。     

09MnNiDR钢的工艺试验研究

通过09MnNiDR钢工艺评定和分析的结果表明,W707DR焊条和H09MnNiDR焊丝是焊接低温压缩机机壳的理想焊材,其各项指标均可满足要求.     

氨气储罐用钢选择及其焊接工艺研究

阐述了低温压力容器常用钢材的性能，选择性能优良的09MnNiDR作为氨气储罐用钢；研究了氨气储罐的焊接工艺与参数。实践表明，氨气储罐焊接工艺合理，质量安全可靠。     

09MnNiDR低温钢脉冲熔化极气体保护焊焊接工艺的试验研究

本文介绍了09MnNiDR低温钢脉冲熔化极气体保护焊的焊接工艺试验。针对09MnNiDR钢焊接中存在的问题,比较了几种焊接方法对焊接热输入的影响,介绍了脉冲熔化极气保焊的特点,并通过试验说明该方法能够改善焊接接头低温冲击韧度,提高生产效率,解决普通气保焊容易出气孔的问题。     

09MnNiDR钢在球罐中的应用

针对低温(-70℃)乙烯球罐09MnNiDR钢板和09MnNiD锻件的焊接,进行焊接工艺评定,由此制定了低温乙烯球罐的焊接工艺规范,并成功完成了低温乙烯球罐的制造厂内组焊制造及现场安装。     

09MnNiDR钢制压力容器的热处理

介绍了09MnNiDR钢制压力容器封头热成形加热及热处理和产品焊后消除应力热处理工艺，并作为今后09MnNiDR钢制压力容器热处理的参考。     

09MnNiDR焊接工艺试验

为完善我厂压力容器常用钢材料的焊接工艺,保证压力容器产品的使用性能,我们拟定了对-70℃低温钢09MnNiDR材料进行焊接性能的研究。低温容器不仅要求钢材本身具有良好的低温性能,同时,应具有良好的制造工艺性能,而且还要求通过焊接、热处理等加工过程后,焊接接头也保证具有良好的低温性能。因此,焊接材料的研究、焊接规范及焊后热处理规范对接头低温韧性的影响等试验研究都是十分重要的。为完善相关制造准备工作,我厂进行了-70℃低温钢09MnNiDR材料首次焊接的工艺评定试验。     

制甲醇用低温压力容器的焊接

通过对国产09MnNiDR及采用ASME规范的SA203-D等低温材料的焊接试验及生产应用，阐述了控制焊接线能量对低温钢焊接的重要性。     

ASTMA765钢焊接接头低温性能

针对离心压气机壳用ASTM A765钢的低温工况,研究了改性材料的焊接工艺及焊后热处理工艺。研究了拉伸性试验、低温冲击试验和金相观察、焊接参数和焊后热处理工艺对焊接接头性能的影响。试验结论显示,采用HS09MnNiDR焊丝焊接的ASTM A765钢可满足-46℃低温工况的使用要求。     

09MnNiDR钢制乙烯低温球罐焊接性能的试验研究

为研究09MnNiDR钢制乙烯低温球罐接性能,对-70℃低温钢09MnNiDR钢板进行了插销冷裂纹试验,试验分别按不预热、预热50℃和预热75℃进行,定量地确定了焊接预热温度对冷裂纹的影响,为国内首台设计温度-67℃、2000m~3乙烯低温球罐的制造提供了试验依据。     

低温分离器用钢板及其焊接接头性能的试验研究

介绍西气东输源头的关键设备（低温分离器）用钢及其焊接接头性能的试验研究。试验结果表明：虽然某些炉批号的09MnNiDR钢板沿厚度方向的组织和性能存在明显的差异，且冲击功有较低的值出现；此外，焊接时要获得没有超标缺陷的焊缝也有难度，但其钢板及没有超标缺陷的焊接接头的性能是可以满足设备的使用要求。     

高压预冷器2205异种钢焊接制造工艺技术探讨

某天然气处理厂的高压预冷器,采用固定薄管板结构,由于管程介质中Cl-含量较高,管箱材质采用2205双相钢复合钢板,管板采用2205双相钢纯材,壳程材质为16MnR(或09MnNiDR)。阐述和分析了管板与管箱、壳程在焊接制造过程中遇到的技术难题和采取的有效措施,从而为双相钢设备的焊接制造提供经验。     

控制式无级变速器的分析研究

对国家实用新型专利“控制式无级变速装置”（专利号ＺＬ９５２４５５９１．９颁证日期９６－０９－１４）,进行了运动学、动力学和机构学的分析研究,提供了该项专利技术的合理应用范围作为技术设计的依据。     

双频振动载荷下带V形槽铝合金棒料的断裂行为

针对金属棒料低应力分离过程中裂纹萌生扩展速率低的问题,提出一种基于双频振动的加载方法,探究带V形槽7A09铝合金棒料的断裂行为。研究了双频振动对带V形槽金属棒料裂纹萌生扩展的作用机理,通过研发双频激振装置,对带V形槽7A09铝合金棒料进行了实验研究。实验结果表明,相对于单频振动加载方法,双频振动载荷能够大幅缩短带V形槽7A09铝合金棒料的分离时间,有效提高裂纹萌生扩展的速率与稳定性,棒料断面几何精度高。     

The effect of equal channel angular pressing on the mechanical and magnetic properties of 09Γ2C steel

The physical and mechanical properties of 09Γ2C steel that was subjected to strengthening by intense plastic deformation using the method of equal channel angular pressing (ECAP) are studied. An unambiguous interrelationship between the magnetic (coercive force, maximal permeability, Barkhausen magnetic noise parameters) and mechanical (rupture limit, conditional yield strength, relative elongation and narrowing upon damaging) characteristics of 09Γ2C steel, which was strengthened using ECAP following different technological regimes, is demonstrated. Therefore, it is possible to estimate the strength and plasticity characteristics of the analyzed material based on the measurement of its magnetic parameters. It has been revealed that under conditions of uniaxial tension in the range from 0 to (0.2–0.6) of the conditional yield strength (depending on the ECAP regime), it is possible to diagnose changes in the stressed state of items that are made of 09Γ2C steel that is hardened in accordance with the ECAP technique using magnetic structuroscopy methods.     

压力容器用低合金钢管的开发和应用

本文系统介绍了兴澄集团开发的五种换热器用低合金钢管,这五种低合金钢管是09CrCuSb,企业代号ND(耐硫酸低温露点腐蚀用无缝钢管);08Cr2AlMo(抗硫化氢、氯化氢应力腐蚀开裂用无缝钢管);09MnD(低温换热器用无缝钢管);10E(耐循环水腐蚀用无缝钢管)和07CrCuAlMoTi(耐硫化氢、高温硫、海水腐蚀用无缝钢管)。     

Accounting for the statistical weights of factors used when studying the liability of rolled products to brittle fracture

The interrelationships between structure, magnetic properties, and impact strength at different temperatures were studied in a 09Γ2 steel with an unchanged chemical composition after varying the heating conditions prior to rolling, as well as the final rolling temperature. These interrelations were also studied for a number of low-alloy steels of different grades (close to steel 09Γ2), which were produced in the workflow at the Nizhni Tagil Iron and Steel Works. It was shown that the coercive force and relaxation magnetization can be used to separate the effects of ferrite grain size and shape on steel properties. The constraint equations for the impact strength and magnetic properties were obtained in terms of a multiparametric model with allowance for the impact strength test temperatures. Idealized relationships between the impact strength and magnetic properties of Ст 3сп and 09Γ2 steels were obtained for the impact strength-coercive force coordinate plane with allowance for the impact strength test temperatures and statistical weight of the studied properties.     

Failure of Metals Produced by Additive Arc Surfacing: Neural Network Analysis

Russian Engineering Research - Structural alloys produced by an additive arc process are tested. Impact-flexure tests with subsequent fractographic analysis show that 09Г2С steel...