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7271.钢铁热处理过程中氢气浓度在线测量系统的设计
[黑色金属冶炼和压延加工业] [2014-03-26]
This paper describes a hydrogen content on-line measurement system in the process of steel heat treatment based on the theory of hydrogen concentration cell.This System design includes two main measurement units and a MCU for calculation and output.The method of measurement data processing is discussed in this paper,and an algorithm of temperature value calibration is also proposed.Final test shows that the instrument has features of portability,continuity and real time capability,which make it has a potential future in the hydrogen content measurement in metallurgical enterprises.
关键词：钢铁；氢气浓度测量；温度标定；分段函数近似算法
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7272.低碳微合金钢的方铁矿的等温转变
[黑色金属冶炼和压延加工业] [2014-03-26]
The isothermal transformation of wustite (FeO) in the range of 650～350℃ was studied using Gleeble 3500 thermal simulated test machine,electron back-scatter diffraction (EBSD) and scanning electron microscopy (SEM).A wustite layer was initially formed by oxidizing low carbon micro-alloyed steel in air at 880℃ for 20 seconds.The layer was then isothermally annealed at 650-350℃ in argon for up to 10000 seconds.The transformation of FeO was comprised by a proeutectoid reaction and a eutectoid reaction.
关键词：钢铁；氧化亚铁；等温转变
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7273.轧后冷却工艺对铌钛微合金化低碳贝氏体钢组织性能的影响
[黑色金属冶炼和压延加工业] [2014-03-26]
The influence of cooling process on microstructure,second phase precipitation and mechanical property of Nb-Ti Micro-alloyed Low-Carbon Bainitic Steel has been examined by metalloscope and TEM.The results lustrate that accelerated cooling after air-cooling (relaxation) to a certain temperature could obtain ferrite / bainite dual phase structure.
关键词：钢铁；铌钛微合金；低碳贝氏体；组织性能；冷却过程
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7274.超临界水氧化处理技术处理焦化废水中316L不锈钢和625合金的腐蚀性能
[黑色金属冶炼和压延加工业] [2014-03-26]
The corrosion behavior of 316L stainless steel and alloy 625 were deteced in superciritical water oxidation (SCWO) process for coking wastewater treatment.The operation conditions were 500 ℃, 25 MPa, oxygen ratio of 3.5 and the reaction time of 150 h.Surface morphologies of metal samples, oxide structure and compositions across the oxide thickness of the metal samples after SCWO were analyzed using SEM and ESD, and the corrosion rates for both samples were obtained.Pitting corrosion was found on the surface of 316L stainless steel with a corrosion rate of 0.334 mrn/a.While no remarkable corrosion was found on the surface of alloy 625, and the corrosion rote is 0.052 mm/a.
关键词：钢铁；腐蚀；超临界水氧化技术；焦化废水；316L不锈钢；625合金
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7275.强制对流S32205双相不锈钢细化晶粒的影响
[黑色金属冶炼和压延加工业] [2014-03-26]
The effects of forced convection on grain refinement of S32205 duplex stainless steel (DSS)were investigated using a continuous casting simulation setup.The sample,which was called slab simulating unit here,was solidified in the continuous casting simulation setup,whose temperature was controlled according to the cooling curve of a DSS slab center,with the bottom cooled by rtmning water to simulate the solidification process of slab.
关键词：钢铁；双相不锈钢；细化晶粒；等轴晶粒；CET
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7276.激光刻划对晶粒取向硅的影响
[黑色金属冶炼和压延加工业] [2014-03-26]
Laser scribing is widely used to reduce core loss of grain-oriemed silicon steel recently.The effects of laser scribing on surface coating and magnetic properties of silicon steel were investigated in this paper.The effect of stress annealing treatment on laser scribing product has been analyzed.It was found that as laser power increased,the core loss reduced and the damage to surface coating exacerbated.Reducing the laser scribing line spacing to a certain width can achieve low core loss.The core loss of laser domain refined product will increase after annealing at certain temperature.
关键词：钢铁；晶粒取向硅；激光刻划；涂层
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7277.聚能装药射流穿透钢靶的三维数值模拟
[黑色金属冶炼和压延加工业] [2014-03-26]
In this paper,adopted explicit dynamic analyzing program AUTODYN basing on finite element to simulate the process of the shaped charge jet formation and the penetration through the steel target,base on the characteristic of the shaped charge structure and the mechanisms of jet penetrating the target.
关键词：钢铁；聚能装药；数值模拟
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7278.20CrMo合金钢热变形中动态再结晶行为的研究
[黑色金属冶炼和压延加工业] [2014-03-26]
Hot compression deformation test were conducted on 20CrMo alloy steel on a Gleeble-1500D thermal simulator when the deformation amount was 30％,temperature ranged from 1273 to 1373K and strain rate from 0.0015 to 0.015s-1.Flow stress curves were obtained under different deformation conditions; DRX activation energy was calculated using mathematical method.The starting time of DRX was analyzed and the kinetic equation of DRX was established.This model fits well with test data and can meet the requirement of engineering calculation.
关键词：钢铁；动态再结晶；热变形；连铸连轧
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7279.报废汽车钢板的粉碎试验与仿真研究
[汽车制造业,黑色金属冶炼和压延加工业] [2014-03-26]
The shredding test and simulation of steel-plate of scrap automobile are mentioned in this text.The result of experiment and simulation are compared.The situation of experiment and attaining the simulation result by the postprocessor program of ANSYS has found a reliable analysis method.The engineering software of ANSYS/ LS-DYNA is used to simulate.
关键词：汽车；钢铁；报废汽车；汽车钢板；粉碎试验；计算机模拟
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7280.回火温度对铌钛微合金化低碳贝氏体钢组织性能的影响
[黑色金属冶炼和压延加工业] [2014-03-26]
The effect of tempering temperature on microstructures and mechanical properties of niobium and titanium microalloying low carbon bainite steel was investigated.The results indicate that the mechanical properties change is mainly controlled by the structure evolution,and as the structure evolution during tempering is complex,the mechanical properties do not monotonously increase or decrease with the increasing of tempering temperature.
关键词：钢铁；回火温度；铌钛微合金；低碳贝氏体；组织性能
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