retained austenite

Developing "carbide free bainite/ martensite microstructure with retained austenite film" technique is introduced.

发展无碳化物贝/马组织和富碳残奥薄膜以做到中低温回火合结钢的强韧化优良配合。

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Their metallographic structures were qualitatively and quantitatively analyzed by scanning electron microscope and X-ray diffraction method. And the relationships among heat treatment parameters, content of retained austenite and carbon content of retained austenite were studied.

通过电子扫描电镜及X射线衍射仪对其金相组织进行定性、定量分析，研究热处理参数与残余奥氏体体积含量、奥氏体含碳量的关系。

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The results show that the heat treatment process has remarkable effect on retained austenite content in matrix and wear resistance of the steel, but has little effect on the morphology and distribution of carbide vanadium.

结果表明，热处理工艺对碳化钒形态分布无明显影响，但对高钒高速钢基体中奥氏体含量和耐磨性有重要影响。

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The experimental results indicate that during 30-120 min, with increasing the isothermal quenching time, the content and carbon content of retained austenite increased to a max value at 60 min, then decreased.

试验结果表明，在30～120min等温淬火时间范围内，随着等温淬火时间的延长，残余奥氏体量及其含碳量逐渐增加，60min时出现峰值，然后逐渐降低；

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A study was wade to increase its surface layer hardness by subzero treatment, during which retained austenite transformed into martensite.

通过深冷处理可使部分残余奥氏体转变成马氏体，从而提高了表面硬度。

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When Nb content was 0.014 ( mass,%), finish rolling temperature was 780 ℃ and coiling temperature was 400 ℃, retained austenite fraction, carbon contents of retained austenite, Vickers-hardness and tensile strength have the optimum combination.

铌含量为0.014%、终轧温度为780℃、卷取温度为400℃时，残余奥氏体量、残余奥氏体相中的碳含量与宏观维氏硬度和抗拉强度具有最佳组合。

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The M' temperature falls with the increasing amount of retained austenite and varies with the carbon content of austenite.

M′温度随钢内残余奥氏体量的增加而降低，并随奥氏体内含碳量而改变。

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The volume fraction and carbon content of retained austenite in the austempered high silicon cast steel after various austempering combinations were investigated by XRD method.

采用X射线衍射对高硅铸钢等温淬火热处理后的残余奥氏体量以及残余奥氏体含碳量进行了测定。

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The results show that matrix is mainly tempered martensite under the condition of quenching at low temperature and tempering at 550 ℃; retained austenite content increases and martensite content relatively decreases along with the increase of quenching temperature, meanwhile, the wear resistance improves.

结果表明：550℃回火条件下，低温淬火时基体组织以回火马氏体为主，随着淬火温度升高，残余奥氏体含量升高，马氏体含量相对减少，而耐磨性随淬火温度升高逐渐升高；

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The cause might be that CFB has a higher temper resistance than M. And carbon enriched retained austenite film in CFB with a good thermal stability might improve the toughness of the steel after tempering at intermediate temperature.

其原因在于中温形成的无碳化物贝氏体具有较高的回火抗力，而无碳化物贝氏体中的热稳定性较高的富碳膜状残余奥氏体使钢呈现较高的韧性。

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Compared with traditional austempered process, this new method would obtain much finer structure with nearly same volume fraction of retained austenite in matrix and carbon content of austenite.

与传统的等温淬火工艺相比，两步法组织得到显著细化，而基体组织中残余奥氏体体积分数及含碳量无明显不同。

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The results show that the increase in Nb content, decreases retained austenite fraction, however, increases tensile strength and yield strength.

实验结果表明：增加铌含量，实验钢的残余奥氏体量减少，抗拉强度和屈服强度增加；

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A Study of Contact Fatigue Resistance and Scuffing Behavior of Retained Austenite

残余奥氏体的抗接触疲劳及擦伤行为的研究

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There occours needle-type or M-type martensite precipitation within retained austenite.

残余奥氏体内有针状或“M”型马氏体析出.

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The martensitic transformation of retained austenite particles in an intercritically annealed low-alloy steel has been studied using the acoustic emission technique.

用声发射法研究了一种低合金钢于双相区热处理所得残余奥氏体的马氏体相变。

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The decomposition and transformation of the retained austenite in bainite differ from that in martensite.

贝氏体中的残余奥氏体分解和转变的行为与马氏体中的不同.

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Therein, both retained austenite decomposition and carbides precipitation were the key factors in the cryo-treating process.

其中残余奥氏体的分解和微细碳化物的析出是关键因素.

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