1) isothermal normalizing(or isothermal annealing)
等温正火(退火)
2) isothermal annealing
等温退火
1.
Prediction on the characteristics of isothermal annealing by using isochronal annealing data;
利用等时退火法预估等温退火效应实验研究
2.
The main components and structural features of the isothermal annealing production line after innovation were expounded,and combustion control and its control systems of the production line were detailedly introduced.
阐述了改造后的等温退火生产线的组成及主要结构特点,并详细介绍了该生产线的燃烧系统及燃烧控制系统。
3.
The crystallization process and kinetics were investigated by isothermal annealing at different temperature, DSC and XRD.
利用单辊急冷法制备了Cu64Zr36非晶合金,使用盐浴等温退火并用DSC和XRD研究了其晶化过程、玻璃转变和晶化动力学。
3) isothermal normalization
等温正火
1.
Test of isothermal normalization and its application in the part blanks of gear box were investigated in this paper The results show that the part blanks treated by isothermal normalization have a finer grain size,more homogeneous microstructure than these treated by conventional normalization.
对变速箱零件毛坯进行了等温正火试验。
2.
This paper introduces automatic production line for isothermal normalization with residual heat from forged steel parts and installed computer distributed control system,(which can be used for heating up gear billet and normalizing isothermally for the second time)developed by our company,which form a complete set with AMP70 hot former made in Switzerland.
介绍了我厂研制的与引进瑞士AMP70热镦机配套的具有计算机集散式控制系统的锻坯余热等温正火自动生产线 (可兼作二次加热齿坯等温正火 )。
4) Isothermal normalizing
等温正火
1.
Discussion on isothermal normalizing of forging steel billet used to make gears of automobiles;
浅谈汽车齿轮锻造毛坯的等温正火工艺
2.
When carburizing automobile pinion parts made of 20CrMoH steel were treated by isothermal normalization,the cooling rates at various sections during the cooling process before isothermal normalizing and after austenitization were in disparity because of complexities of the pinion sections,which lead to diversity of microstructure and non-homogeneity of hardness at different sections.
20CrMoH钢汽车轴齿锻造毛坯等温正火处理时,由于轴齿截面变化复杂,在奥氏体化后等温正火前的冷却过程中各截面冷却速度不一致,使显微组织差异性加大,各截面硬度不均匀,切削后表面状态也不一致,严重影响了产品质量。
3.
After analyzes the influence of automobile cemented gear rough,which is adopted the method of utilizing the residual forging heat for normalizing and isothermal normalizing,on it's structure,hardness,and distortion during cementation and quenching,the feasibility and necessity of the way of utilixing the residual forging heat for isothermal normalizing as pre-heat treatment are determined.
探讨了利用锻造余热对汽车渗碳齿轮毛坯进行等温正火和普通正火后对齿轮的组织、硬度及渗碳淬火变形等的影响,确定了锻造余热等温正火作为预先热处理的可行性和必要性。
5) isothermal-annealing
等陇温退火
6) isochronal and isothermal annealing
等时等温退火
补充资料：退火
| 退火 annealing 将工件加热到预定温度，保温一定的时间后缓慢冷却的金属热处理工艺。退火的目的在于：①改善或消除钢铁在铸造、锻压、轧制和焊接过程中所造成的各种组织缺陷以及残余应力，防止工件变形、开裂。②软化工件以便进行切削加工。③细化晶粒，改善组织以提高工件的机械性能。④为最终热处理（淬火、回火）作好组织准备。常用的退火工艺有：①完全退火。用以细化中、低碳钢经铸造、锻压和焊接后出现的力学性能不佳的粗大过热组织。将工件加热到铁素体全部转变为奥氏体的温度以上30～50℃，保温一段时间，然后随炉缓慢冷却，在冷却过程中奥氏体再次发生转变，即可使钢的组织变细。②球化退火。用以降低工具钢和轴承钢锻压后的偏高硬度。将工件加热到钢开始形成奥氏体的温度以上20～40℃，保温后缓慢冷却，在冷却过程中珠光体中的片层状渗碳体变为球状，从而降低了硬度。③等温退火。用以降低某些镍、铬含量较高的合金结构钢的高硬度，以进行切削加工。一般先以较快速度冷却到奥氏体最不稳定的温度，保温适当时间，奥氏体转变为托氏体或索氏体，硬度即可降低。④再结晶退火。用以消除金属线材、薄板在冷拔、冷轧过程中的硬化现象（硬度升高、塑性下降）。加热温度一般为钢开始形成奥氏体的温度以下50～150℃ ，只有这样才能消除加工硬化效应使金属软化。⑤石墨化退火。用以使含有大量渗碳体的铸铁变成塑性良好的可锻铸铁。工艺操作是将铸件加热到950℃左右，保温一定时间后适当冷却，使渗碳体分解形成团絮状石墨。⑥扩散退火。用以使合金铸件化学成分均匀化，提高其使用性能。方法是在不发生熔化的前提下，将铸件加热到尽可能高的温度，并长时间保温，待合金中各种元素扩散趋于均匀分布后缓冷。⑦去应力退火。用以消除钢铁铸件和焊接件的内应力。对于钢铁制品加热后开始形成奥氏体的温度以下100～200℃，保温后在空气中冷却，即可消除内应力。 |
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参考词条