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low heat
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  降低热量
    Production operation has shown that the newly designed plasma nitriding furnace is of low heat loss, high loadbearing capacity and easy maintenance.
    实际使用表明,新型离子渗氮炉可大大降低热量损失,增加承重能力,维护保养方便;
短句来源
    Production operation has shown that the newly designed plasma nitriding furnace is of low heat loss,high load-bearing capacity and easy maintenance.
    实际使用表明,新型离子渗氮炉可大大降低热量损失,增加承重能力,维护保养方便;
短句来源
    Production operation has shown that the newly designed plasma nitriding furnace is of low heat loss, high load-bearing capacity and easy maintenance.
    实际使用表明,新型离子渗氮炉可大大降低热量损失,增加承重能力,维护保养方便;
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  “low heat”译为未确定词的双语例句
    Application of the Low Heat Value Cokes in 5t/h Cupola Melting
    低热值土焦在5t/h冲天炉中的应用
短句来源
    However, when welding speed is higher than 2 m/min the low heat input is no longer an advantage since lack of penetration becomes a problem.
    然而,当焊接速度大于2m/min时,由于熔深不足的问题,低热量输入不再成为优点。
    Plasma Spraying is a modern method to manufacture the functionally gradient material thermal barrier coatings (FGM-TBCs), and the functionally gradient material thermal barrier coatings is an important wag for low heat emission engine, it has promised attractive application.
    等离子喷涂工艺是功能梯度热障涂层(Functionally Gradient MaterialThermal Barrier Coatings)的一种先进制备方法,功能梯度热障涂层(FGM-TBCS)是低散热发动机用涂层的重要发展方向,其应用前景非常广阔。
短句来源
    Hardness distribution in welding HAZ indicated that softening zone exist in welding HAZ and the softening zone became wider with the increasing of heat input, So X60 pipeline steel was fit to low heat input welding(<30kJ/cm).
    焊接热影响区的硬度分布表明热影响区存在一软化区,随着线能量的增加,软化区变宽,所以X60管线钢适合在线能量在小于30kJ/cm下进行焊接。
短句来源
    Through procedure evaluation and welding practice of 9Cr- 1Mo furnace tubes, it is found that the welding proctxlure with low heat input; preheating at 300℃ ; postheating 350℃×40min, and stress relief treatment at 720℃×?
    通过对9Cr-1Mo炉管焊接工艺评定及实践证明,采用小线能量焊接,焊前预热300℃焊后后热350℃×40min,焊后消应力处理为720℃×40min的焊接工艺是可行的.
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  low heat
Generally low heat flow is observed in wells within the deeper portions of the basin and higher heat flow values occur in wells along the Aklavik Arch Complex which forms the southeastern margin of the basin.
      
An area with extremely low heat flow is observed in the western side of the caldera showing the presence of percolating meteoric water.
      
The average heat flow in CPC and the low heat generation (less than 1 μW m-3) indicate that a relatively large amount of heat flows upwards into the crust which is generally quite cool.
      
Heat flow data from the eastern Mediterranean region indicates an extensive area of low heat flow, spreading over the whole basin of the Mediterranean east of Crete (Levantine Sea), Cyprus, and northern Egypt.
      
The % Rx for 6069-AC ingot is higher than that of 6061-AC ingot at a given % CW and heat-treatment temperature, especially at low heat-treatment temperatures.
      
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This paper describes the upper and lower heat input limits of EB welding for four kinds of thin sheet materials normally used in aircraft industry. The testing data for the useful range of survey are also provided. The method of approximation to the lower limit for getting a sound weld with full penetration is given. In this paper, we have explained the influence of upper and lower heat input limits on the formation of welding bead and introduced the method of using the curve of heat...

This paper describes the upper and lower heat input limits of EB welding for four kinds of thin sheet materials normally used in aircraft industry. The testing data for the useful range of survey are also provided. The method of approximation to the lower limit for getting a sound weld with full penetration is given. In this paper, we have explained the influence of upper and lower heat input limits on the formation of welding bead and introduced the method of using the curve of heat input range to get the optimum welding parameters. A complete set of turbine guide vanes for a jet engine(75 vanes, 100 welds) has been successfully welded with only one test-weld by making use of the curve of heat input range.

本文提供了航空工业中四种常用材料薄板电子束焊的下限线能量、上限线能量和线能量段的试验值;并提出了成形良好、穿透焊缝的下限线能量的近似计算方法。阐述了下限线能量和上限线能量对焊缝成形的影响,并介绍了利用线能量段曲线选择规范、优选焊缝的方法。本文提供了利用线能量段曲线,经一次试焊就成功地焊接了一台份喷气发动机涡轮导向器叶片(75片,100条焊缝)的实例。

The relationship between the manganese and niobium contents, the proce ssing parameters (heating temperature, rolling schedual, cooling and aging after rolling), the microstructures, the mechanical properties and the fract-uve behalior of 06MnNb steels were investigated.By employing the procedure of lower heating temperature. optimizing rolling schedual and interrupted cooling with a cooling rate of 17℃ per second between 780°-600℃ a complex microstructure containing fine acicular ferrite and small...

The relationship between the manganese and niobium contents, the proce ssing parameters (heating temperature, rolling schedual, cooling and aging after rolling), the microstructures, the mechanical properties and the fract-uve behalior of 06MnNb steels were investigated.By employing the procedure of lower heating temperature. optimizing rolling schedual and interrupted cooling with a cooling rate of 17℃ per second between 780°-600℃ a complex microstructure containing fine acicular ferrite and small amount of fine M/A inlands and granular bainite can be obtained.This complex microstructure is superior to ferrite pearlite structure is both yield strength and low temperatare toughness. The main factor defermining streugth and toughness-of steol is the mean diameter of acicular ferrite.The toughness of bainite dependsopon its parketsije.The amount and parket sije of gaunlar banite is affected by heating temperatare and amount of deetormation.

本文研究了06Mn Nb钢中Mn、Nb含量,加热温度、轧制规程、轧后冷却及时效处理等工艺因素与轧后组织性能和断裂行为的关系。降低加热温度,采用合适的轧制规程,轧后在780—600℃之间以17℃/秒冷速冷却,碍到细小的针状铁素体晶粒,细小的M/A岛及少量粒状贝氏体组织的复合组织。提高Mn、Nb含量与加快轧后冷却有相似的作用。这样的组织比控制轧制后空冷的铁素体与珠光体组织,具有更高的σ_Y和好的低温韧性。粒状贝氏体的数量与贝氏体束的尺寸,与加热温度和总形量有很大关系,贝氏体的韧性决定于贝氏体束的大小,大的M/A岛能诱发裂纹。针状铁素体晶柱尺寸,是决定钢的屈服强度与低温韧性的主要因素。

Effect of I.H.T on structure and properties of 30CrMnSi steel hasbeen investigated in this paper. Results show that the mechanical prop-erties (such as σ_b, σ_(0.2), δ, φ and α_k) of intercritically treated steelmeet the national standards. Of the above properties, α_k of intercritic-ally treated steel is three times as high as that of the national stand-ards. It is worthy to note that the strengths (σ_b and σ_(0.2)) obtained by singlequenching (intercritical quenching) and low-temperature tempering forthis...

Effect of I.H.T on structure and properties of 30CrMnSi steel hasbeen investigated in this paper. Results show that the mechanical prop-erties (such as σ_b, σ_(0.2), δ, φ and α_k) of intercritically treated steelmeet the national standards. Of the above properties, α_k of intercritic-ally treated steel is three times as high as that of the national stand-ards. It is worthy to note that the strengths (σ_b and σ_(0.2)) obtained by singlequenching (intercritical quenching) and low-temperature tempering forthis steel are as high as ultra-high strength steel, i, e.σ_b≥l70kg/mm~2,σ_(0.2)≥150kg/mm~2. In addition, the technology is comparatively simpleand it can save energy due to low heating temperature. Thus it tendsto reduce the severity of the quenching stress, warping and queuch crackin steel.

本文研究了临界点间热处理对30CrMnSi钢的组织和机械性能的影响。结果表明:钢经临界点间热处理后的机械性能(如σ_b,σ_(0.2),δ,ψ和a_k)达到了国家标准。其中a_k为国家标准的3倍。值得注意的是钢经临界点一次淬火和低温回火后,其强度(σ_b,σ_(0.2))达到超高强度钢的水平。即σ_b≥170kg/mm~2,σ_(0.2)≥150kg/mm~2。此外,这种工艺比较简单,加热温度低,可节省能源。还可减小钢中淬火应力、扭曲及开裂倾向。

 
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