渗碳

The test results show that the contact fatigued microstructure characters mainly the reduction of pearlitic interlamellar spacing, the formation of different type of substructures as well as the deformation and fracture of cementitic lamellar in pearlite.

结果表明，PD3钢轨钢接触疲劳变形组织的主要特征是：珠光体片层间距的减小；不同类型亚结构的形成；渗碳体的变形与断裂。

Minor Ce is found in pearlite and honeycomb ledeburite which transformed by the dendrite of primary austenite, while major Ce in ledeburite of lathy cementite type.

初生奥氏体枝晶转变形成的珠光体和蜂窝状莱氏体都含有较少的Ce，而板状渗碳体型莱氏体含Ce较多。

Nonsymmetrical carburizing may also contribute to distortion.

渗碳的不对称也可能导致变形。

A pearlitic steel is composed of numerous pearlitic colonies with random orientations, and each colony consists of many parallel lamellas of ferrite and cementite.

珠光体钢由众多随机取向的珠光体团构成，每一珠光体团又包含了许多平行的铁素体和渗碳体片层。

Thin laminar pearlitic colony is the element of a kind of two phase materials,which is composed of the thin lamellas of ferrite and cementite one over the other.

细片层珠光体团是由铁素体片和渗碳体片交替叠合而成的复相材料。

However, semi-steel is made of 10 ~ 20% cementite and pearlitic matrix, there exists no pellet-shaped graphite, so sticking is easy to happen to it, which is not expected dunng rolling.

然而半钢材质是由10-20％渗碳体及珠光体基体所组成，其内不存在球状石墨，所以半钢材质容易产生粘钢现象，这是轧制过程所不希望的。

In ECAP route C, in order to accommodate the severe shear deformation the deformation form of lamellae cementite in pearlitic steel include periodical bending, periodical shearing and shearing fracture etc .

在C方式ECAP变形中，珠光体钢65Mn中的渗碳体以周期性的弯曲变形，周期性的剪切变形，剪切断裂等形式协调ECAP的强烈塑性变形。

If the deformation of pearlitic cementite is assumed to be purely elastic, the pearlitic colony will become rapidly shaked down plastically.

若假设渗碳体的变形为纯弹性，珠光体团将迅速实现塑性安定。

The causes of extreme distortion of large gear shaft after carburizing and quenching were analyzed,and the distortion-controlling measure such as make preallowance and adopt autempering process are proposed.

分析了大齿轮轴渗碳淬火后齿面产生较大畸变的原因，找出了适合预留收缩余量和等温淬火工艺，解决了大齿轮轴的热处理畸变。

Through the microstructure analysis, it is found that there are ferrite, spiculate bainite in base material, weld metal area and heat-affected zone, and there is much dispersed Fe3C on ferrite and bainite, which indicates that weld joints of steel B610CF have better strength and toughness.

金相分析表明，焊接接头的母材区、焊缝区和热影响区组织均为铁素体和下贝氏体，在铁素体和贝氏体上还弥散分布着渗碳体，说明焊接接头的强度和韧性都较好。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。