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等温形成
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  “等温形成”译为未确定词的双语例句
     EFFECT OF AUSTENITE DEFORMATION ON ISOTHERMAL NUCLEATION INCUBATION TIME OF PRO-EUTECTOID FERRITE
     奥氏体形变对先共析铁素体等温形成孕育期的影响
短句来源
     The forming rules of reversed, austenite during continuous heating and isothermal have been investigated by means of TEM、LK02 high—speed quenching dilatometer and x—ray diffractometer, put forwards the forming mechanism of reversed austenite during iaothermal and set up the relation between microstructure and its properties by computer linear regression.
     利用TEM、LK02型高速淬火膨胀仪及x射线衍射仪研究了马氏体时效不锈钢在连续加热及等温过程逆转变奥氏体的形成规律,对逆转变奥氏体的等温形成机理提出了新的设想,并采用计算机线性回归的方法建立了组织与性能间的关系。
短句来源
     Based on the characteristic of linear relationship between volume fraction of reverted austenite and isothermal time during initial stage of isothermal process,a new method is proposed for determining the first formation time of reverted austenite in case of several isothermal temperature.
     基于奥氏体形成初期其体积分数与等温时间间近似成线性关系的特点,给出了一种确定不同等温温度下逆转变奥氏体开始形成时间的新方法,获得了在相同转变量下的奥氏体等温形成动力学图(即TTA图)。
短句来源
  相似匹配句对
     Formation of Belief
     信念的形成
短句来源
     (2) isothermal;
     一般等温;
短句来源
     ON THE FORMATION OF AMORPHOUS SOLIDS
     非晶态的形成
短句来源
     EFFECT OF AUSTENITE DEFORMATION ON ISOTHERMAL NUCLEATION INCUBATION TIME OF PRO-EUTECTOID FERRITE
     奥氏体形变对先共析铁素体等温形成孕育期的影响
短句来源
     FORMATION MECHANISM OF ISOTHERMAL MARTENSITE IN 1C-1.5Cr BALL BEARING STEEL
     1C-1.5Cr轴承钢中等温马氏体的形成
短句来源
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  isothermal formation
Investigations of the melting curve in this system lead to the conclusion, that during isothermal formation of microcrystals under certain conditions only metastable states can be reached.
      
The microspheres differ from those made from acidic proteinoid but resemble coacervate dtoplets in some ways (isothermal formation, limited stability, stabilization by quinone, uptake of dyes).
      
Despite the problem of accurately determining the temperature of the part of the sample actually investigated, a kinetic analysis of the isothermal formation is shown to be possible.
      
In ternary alloys, water and oil quenching resulted in the formation of orthorhombic martensite (α'') in a retained β + ωathermal matrix, whereas slower cooling showed evidence of fine α and ωisothermal formation within the β matrix.
      
For all the systems investigated, it is shown that the adhesive strength in relation to the duration tf of their isothermal formation is described by curves with a maximum, whose values depend on the formation temperature Tf.
      
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The existence of superledges on the broad faces of bainite formed isothermally at 320 and 420℃ has been observed with TEM on the specimens of a Si-modifled AISI 4340 steel. The height, α, and the width, b, of the superledges are about 320—850 and 1500—1800 A respectively. From the thickening rate of bainire, 0.006μm/s, the width of the superledge, b, is calculated to be approximately 0.5μm, this being of the same order of magnitude as width of the superledges observed. These ledges did exist at the habit plane...

The existence of superledges on the broad faces of bainite formed isothermally at 320 and 420℃ has been observed with TEM on the specimens of a Si-modifled AISI 4340 steel. The height, α, and the width, b, of the superledges are about 320—850 and 1500—1800 A respectively. From the thickening rate of bainire, 0.006μm/s, the width of the superledge, b, is calculated to be approximately 0.5μm, this being of the same order of magnitude as width of the superledges observed. These ledges did exist at the habit plane and act as the growing superledges, ε-carbide and cementite were also found in bainite formed during 320 and 420℃ reaction. The orientation relationship between ε and α is the Jack relationship. Therefore, the existence of a eutectoid decomposition γ→α+ε at about 350℃, as suggested by Hehemann, is questionable. As the holding duration was prolonged there appeared cementite existing between γ and α phases. The orientation relationship between Fe_3C and γ is the Pitsch, Fe_3C and α-the Isaichev and γ/α is K-S relationship, from which the orientation relationship among γ-α- γ(or γ-α-Fe_3C) can also be established. However, it is uncertain whether or not the carbides are interphase boundary precipitates. The results have shown that part of the γ/α interface boundaries extended in a curve shape. The morphology of such interfaces and the existence of the growing superledges indicate that the growing interface is not a coherent one, so it is difficult to ascribe the growing mechanism of bainite to coherent shearing mechanism and it is more likely that bainite grows through the lengthening of the ledges.

电镜观察发现4340加Si钢在320℃及420℃等温形成的贝氏体宽面上均存在巨型台阶,其高度a为320—850(?),宽度b为1500—1800(?),和根据贝氏体增长速率为0.006μm/s计算所得的b=0.5μm在同一数量级,这些台阶位于惯习面上,为贝氏体的长大台阶。无论在320℃或420℃等温形成的贝氏体中均存在ε碳化物,ε和α之间的位向呈Jack关系。因此,Hehemann提出的在350℃附近存在γ→α+ε转变的看法自属疑问。等温较长时出现渗碳体,它位于γ和α之间。Fe_3C和γ之间具有Pitsch关系,Fe_3C和α之间为Isaichev关系,γ和α之间具有K-S关系,由此也可建立γ-α-ε或γ-α-Fe_3C之间的位向关系,但尚不能肯定碳化物系相间沉淀。发现部分γ/α界面呈弯曲状伸展,表示非共格界面。鉴于存在长大台阶以及非共格界面,因此贝氏体的长大机制很难归之于共格切变,而很可能为台阶的伸长。

The morphologies and substructures of bainitic ferrite formed isothermally inFe-Ni-C and Fe-Si-C alloys have been studied by means of SEM and TEM.Theseobservations are interpreted in terms of current ideas concerning the structureand migration characteristics of fcc/bcc interfaces.It is concluded that the bainiticsubunits are an autocatalytically nucleated variant of the bainite lath product,which grows with some departure from local equilibrium,and which neverthelessrequires carbon diffusion during growth,And...

The morphologies and substructures of bainitic ferrite formed isothermally inFe-Ni-C and Fe-Si-C alloys have been studied by means of SEM and TEM.Theseobservations are interpreted in terms of current ideas concerning the structureand migration characteristics of fcc/bcc interfaces.It is concluded that the bainiticsubunits are an autocatalytically nucleated variant of the bainite lath product,which grows with some departure from local equilibrium,and which neverthelessrequires carbon diffusion during growth,And the series of transformation productsin steel:Widmanst(a|¨)tten ferrite,massive ferrite,upper bainite,lower bainite,lathmartensite can be interpreted as a continuous series.

本文用SEM,TEM电镜研究了Fe-Si-C及Fe-Ni-C合金中等温形成的贝氏体铁素体的形貌和亚结构.以相界面的结构及扩展特征的现有概念对这些观察结果进行了解释.分析结果认为:钢中贝氏体转变是从块型转变到马氏体型转变的中间过渡型连续系列,界面扩展的机制是扩展控制型-界面控制型-位错滑移型的混合机制,以界面控制型为主.

Specimens of commercial 60Si2Mn steel were austenitized at 870℃ and then anstempered at different temperatures varying from 320°to 500℃.The morphology and the structure obtained were studied by means of X-ray diffraction and optical and electron microscopy.The results showed that the upper bainite found in this steel was different from the ordinary bainite and fell into two kinds of morphology accor- ding to the isothermal holding time.In the early stage of the time,carbide-free bainite or B_Ⅰtype bainite was...

Specimens of commercial 60Si2Mn steel were austenitized at 870℃ and then anstempered at different temperatures varying from 320°to 500℃.The morphology and the structure obtained were studied by means of X-ray diffraction and optical and electron microscopy.The results showed that the upper bainite found in this steel was different from the ordinary bainite and fell into two kinds of morphology accor- ding to the isothermal holding time.In the early stage of the time,carbide-free bainite or B_Ⅰtype bainite was formed;and in the late stage,it transformed into the typical granular bainite.There is no distinct demarcation between the two stages.The formation of the granular bainite is thought to be the result of the growth of bainite ferrite in the B_Ⅰ type bainite ane spheroidization of the carbon- rich austenite owing to the spontaneous tendency of reducing boundary energy. The austenite content in the B_Ⅰtype upper bainite accounts for 22%,and the carbon content in the austenite reaches to 1.52%,The austenite is highty stable when treated at-78℃ and tempered below 300℃. In addition,the mechanical behaviours of B_Ⅰtype upper bainitc were discussed.

本文用光学显微镜、电子显微镜和 X 射线衍射仪,对60Si2Mn 钢经870℃×20分钟奥氏体化后在320~500℃等温不同时间所获得的组识形态和结构进行了研究。认为这种钢的上贝氏体在等温形成的前期阶段为无碳化物贝氏体或称 BI 型上贝氏体,后期阶段为典型粒状贝氏体。粒状贝氏体的形成是 BI 型上贝氏体中贝氏体铁素体长大与富碳奥氏体为减少界面能而进行球化过程的结果。BI 型上贝氏体中奥氏体量达22%,其含碳量为1.52%,经-78℃处理和300℃以下回火显示了高度的稳定性。此外,初步探讨了 BI 型上贝氏体的机械性能。

 
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