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   凝固层 在 金属学及金属工艺 分类中 的翻译结果: 查询用时:0.16秒
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凝固层
相关语句
  solidified layer
    In addition, thequantitative relationships of the thickness of solidified layer at the exit of crys-tallizer with the main technological parameters, including the temperature of liq-uid iron at entrance of crystallizer, the moving speed of the bar and the intensityof water cooling, were obtained by using numerical simulation.
    在此基础上,进一步用凝固模拟方法研究了水平连铸铸铁棒材生产中主要工艺参数对结晶器出口处棒材凝固层厚度的影响。
短句来源
    The result indicates that, the interface is divided into the diffusion layer and chill solidified layer.
    结果表明:电磁复合铸造高铬铸铁轧辊界面由扩散层和激冷凝固层组成;
短句来源
  “凝固层”译为未确定词的双语例句
    Study on the Solidified Sheel Thickness of Slab in Contunuous Slab Caster
    板坯连铸机凝固层厚度的研究
短句来源
    Lamellar structures of rapidly unidirectionally solidified Zn-2%Cu peritectic alloy
    Zn-2%Cu包晶合金快速定向凝固层片状组织
短句来源
    Study on Discriminant for Position of Welding Point of Solidification Layer During Twin-Roll Casting
    双辊铸轧凝固层焊合点位置判别式的研究
短句来源
    The results of optimal process parameter show that preheat power is 30kw for axes, preheat temperature is 600℃, casting temperature is 1430-1450℃, heat preservation period is 360-420 seconds, heat preservation power is 50kw, and falling speed is 1.33-1.56mm/s.
    对电磁半连续复合铸造轧辊工艺研究结果表明,最优工艺参数为:芯轴预热功率30KW,预热温度600℃,浇铸温度1430-1450℃,保温时间360-420秒,保温功率50KW,下降速度1.33-1.56mm/s。 轧辊结合界面区域由扩散层和正常凝固层组成,不存在激冷凝固层和方向性生长层;
短句来源
    The change of solidification thickness with the time during aluminium melts solidify when the aluminium strips are produced by continuous cast-rolling are reckoned.
    推导了双辊式连续铸轧铝板带生产工艺中铸轧区内液体金属凝固时,凝固层厚度随时间变化的函数关系;
短句来源
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  solidified layer
The effect of the semitransparency of the oxide, of the thickness of the melt, and of the rate of its cooling on the behavior of crystallization and on the structure of solidified layer is analyzed.
      
The boundaries of the solidified layer are folded.
      
In particular, a closed-form expression is derived for the position where the maximum temperature occurs and for the thickness of the solidified layer.
      
The upper solidified layer grows at a faster rate than the lower solidified layer.
      
The data for the three materials conform to a relationship observed previously according to which the thickness of the solidified layer is a linear function of the square root of time.
      
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This paper surveys a description of the technological features of the washing process which isadopted to eliminate the severe foundry defects of the composite rolls with high Ni-Cr-Mo alloychilled cast iron case and spheroidal graphite iron core. In practice, the carbon content of the outerlayer is limited to a lower percentage, and proper quantity of magnesium is added so as to employan iron of higher silicon content. The pouring process is also improved so as to increase the earlysolidification layer thickness...

This paper surveys a description of the technological features of the washing process which isadopted to eliminate the severe foundry defects of the composite rolls with high Ni-Cr-Mo alloychilled cast iron case and spheroidal graphite iron core. In practice, the carbon content of the outerlayer is limited to a lower percentage, and proper quantity of magnesium is added so as to employan iron of higher silicon content. The pouring process is also improved so as to increase the earlysolidification layer thickness outside of the roll. Besides, high silicon spheroidal graphite iron is usedas the material washing the roll core. By adopting the above process, one can effectively preventthe formation of hot tears, microflaw, gas bubbles in rolls, and the problem of insufficiency ofdepth of chilled structure is solved throughly. The rate of qualified cast is raised to over 91%.Hardness of roll surface is HS 75-85. The consumption of roll is 2-3kg/t, when2.5-8mm thicknesssteel plate (therein, 2/3 thin plate; 1/3-1/2 alloy steel plate) is rolled. Theoretical analysis on theprominent effect achieved is also described in this paper.

为了解决高镍铬钼合金硬面球芯复合铸铁轧辊发生的严重铸造缺陷,本文概述了采用冲洗法生产外层为高镍铬钼合金铸铁,中心为高硅球铁冲洗的材质和工艺特点。生产实践中,在外层合金铁控制较低的碳含量,加入适量的镁以提高硅含量;同时改进浇注工艺,以增加外层合金铁的初期凝固层厚度的方法。这种生产方法,有效地克服了轧辊的热裂、发裂、气孔的产生,并彻底解决了白口层不足的问题;铸造合格率达到91%以上,轧辊的表面硬度为HS75~85。热精轧厚度2.5~8mm钢板(其中薄板占2/3,合金钢占1/3~1/2),辊耗为2~3kg/t。文章对取得的效果进行了理论分析。

Some square block specimens of commercially pure aluminium(99.7%A1) are casted in sand mould for research study. It is found that the grain regions in the specimen are different from the typical three grain zones in an ingot. The distribution and veriation of the zones have been observed at different pouring temperatures; and the forming time of the various zones and the rate of their freezing during solidification have been measured by decanting the specimen. The nucleation, growth and floating of the mini-crystals...

Some square block specimens of commercially pure aluminium(99.7%A1) are casted in sand mould for research study. It is found that the grain regions in the specimen are different from the typical three grain zones in an ingot. The distribution and veriation of the zones have been observed at different pouring temperatures; and the forming time of the various zones and the rate of their freezing during solidification have been measured by decanting the specimen. The nucleation, growth and floating of the mini-crystals caused by chilling of the mould wall are analysed; the remelting. coarsing. sinking and freezin of the suspended grains have been calculated, by analysing the zone distribu- tion, the grain size and the internal grain shape of the two distinct equiaxed zones, the mechanism of the equiaxed zone formation is suggested; and final- ly the condition for the formation of the various grain zones are explained.

在砂型中用工业纯铝(99.7%)浇注方锭试样,发现试样上晶区与典型铸锭三晶区有很大差 别.本文通过观察不同浇注温度时试样断面上各晶区的分布与变化,以及用倾翻试样测定各晶区 形成的时间与凝固层增长速度,进而分析浇注时型壁激冷引起液体合金中晶体的生核、长大和漂移; 计算悬浮微晶体的重熔、粗化、沉陷和凝固;结合试样上存在的两个界线分明的等轴晶区的分布、 晶粒大小.内部形貌的分析,对等轴晶的形成过程进行了讨论,进而说明各晶区形成的条件。

The present work shows that the nonuniform thickness of solidified skin of slab created by the nonuniform cooling rate of the skin in the crystallizer is main cause for slab surface cracking.The nonuniform distribution of the melted protective slag layer between the slab and the crystallizer generated heat conduction difference at the slab surface, then cooling rate in the slab surface became different. When a part of skin surface separates first from the mold, the difference of cooling rate in slab surface...

The present work shows that the nonuniform thickness of solidified skin of slab created by the nonuniform cooling rate of the skin in the crystallizer is main cause for slab surface cracking.The nonuniform distribution of the melted protective slag layer between the slab and the crystallizer generated heat conduction difference at the slab surface, then cooling rate in the slab surface became different. When a part of skin surface separates first from the mold, the difference of cooling rate in slab surface was enlarged. If this separated part of skin can keep close back to the mold as soon as possible, the difference of cooling rate in slab surface may be reduced, then no crack appears. Control of the primary cooling water can make the slow cooling zone small and also the tensile strain small, hence the cracking may be avoided.The stress required for producing internal crack decreases since there are loci of cracks in the slab caused by the surface crack, so the longitudinal cracks from inner to surface form easily. The extremely large temperature difference between the skin surface and inner layer caused by direct secondary cooling water generates very severe thermal stress, in tnis case the internal cracks form more ceasily. This thermal stress in the thinner part of skin appears more severe, therefore increasing the atomization covering area of the nozzle is an effective measure for avoiding internal cracks.

试验结果得知,坯壳在结晶器内冷却不均,使坯壳凝固层厚薄不同,是铸坯产生表面裂纹的主要原因。结晶器内,熔融的保护渣层分布不均,使铸坯表面热传导有所差异,而引起铸坯表面冷却不均,使局部坯壳首先脱离结晶器壁。结果更扩大了铸坯表面冷却速度差异的程度。坯壳局部区域脱离结晶器壁后,若能及时复贴结晶器壁,可改善铸坯表面冷却不均的现象,从而避免裂纹的出现。控制—冷区用水量以达到缓冷,使凝固缓慢区变小,拉伸应变也随之而小,亦可避免裂纹产生。由于铸坯表面裂纹形成的裂纹灶,降低了产生内裂所需要的应力值,易于形成内、外相连的纵裂。同时二次冷却水对刚出结晶器的铸坯进行直接冷却,坯壳表面温度急速下降,致使坯壳内层遭受到很大的热应力,易于引起坯壳产生内裂。这种热应力在坯壳较薄处更为明显。因而增加喷嘴雾化复盖面;对减少内裂是有效的措施。

 
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