在解决该问题的过程中，提出了一个临界冷却速度的概念，对钢的渗碳及其后热处理有重要的指导意。
A concept of critical cooling rate given in this paper for carburizing and post heat treatment of steel.
高于此点，由于超过共析点钢完全由珠光体和退火状态的渗碳体组成，硬度增加并不多。
Above this point the hardness can be increased only slightly, because steels above the eutectoid point are made up entirely of pearlite and cementite in the annealed state.
不透钢的返修，应尽量采用间歇和分段气刨，以减少热量输入，并彻底清除渗碳层，露出金属光泽后方可焊接。
For the repair of stainless steel, to reduce heat energy and clean completely, gouging should in discontinuous way.
轧机轴承一般载荷条件是中重载荷和冲击载荷，因此，最适用的材料为渗碳轴承钢。
General loading condition of rolling mill bearings is medium - heavy load and shock load, thus the most suitable material is carburising bearing steel.
通过对20钢渗碳层硬度分布的模拟结果表明，此方法是可行的，且具有较强的实用性和可操作性。
The simulating results fits the measured hardness about the 20 steel carburized and quenching. It indicates that this method is feasible, and has more practical and operating manual.
非平衡气氛的碳势定义为：当渗碳反应在钢表面净产生的碳为零时碳钢表面的含碳量。
The non equilibrium carbon potential is defined as the carbon content of steel when the net carbon production rate at surface of steel vanishes.
由于渗碳体阻碍晶粒长大，所以随碳含量的增加，钢的再结晶温度升高。
The cementite phase in steels increases the recrystallization temperature and abstracts the grain growth.
过渗碳处理可以有效提升高合金工具钢的表面特性。
The Super carburization process can provide outstanding performance in the surface hardening of high-alloyed steel.
利用旋转弯曲疲劳试验方法研究了三种重载齿轮钢渗碳后的疲劳性能。
Fatigue properties of three case hardening steels for heavy duty gears after carburization were investigated by means of rotating bending fatigue tests.
与此类似，渗碳层厚度越大，特别是对于渗碳层厚度不一的渗碳用钢，淬火时更易产生翘曲。
Sim? ilarly, an increase in case depth, particularly uneven case depth in case hardening steels, increases warpage on quenching.
低温离子渗碳处理是一种能改善奥氏体不锈钢表面力学性能的有效方法。
After low temperature plasma carburizing, the surface hardness, wear resistance and fatigue capability of austenitic stainless steels are largely increased.
研究了20钢和T12钢在离子轰击条件下的渗碳和脱碳过程。
This paper deals with the surface apparent process of plasma carburizing. The steel 20 and T12 were used.
研究了渗碳后深冷处理对20钢机械性能的影响，分析讨论了深冷处理的作用机理。
The effect of deep cooling treatment after carburizing on properties of 20 steel is studied and the effect mechanism of the deep cooling treatment is analyzed.
概述了国外渗碳型高温轴承钢的研究情况。
Overseas studies on carburized high temperature bearing steels has been summarized in the paper.
为了准确地检验高碳过共析钢盘条中的网状渗碳体，分别对选用硝酸酒精溶液侵蚀和碱性苦味酸钠水溶液热侵蚀两种显示方法进行了比较。
In order to detect the carbide network in high carbon hypereutectoid steel wire rods accurately, two kinds of detection method of the carbide network are compared.
经热处理淬火的碳素工具钢和渗碳淬火钢零件，在磨削时常常出现大量较规则排列的裂纹，它直接影响零件的质量。
The parts of tool steel and carburization hardened steel through he at treatment has often appeared grinding cracks. It influences the quality of the parts.
由于超过共析点钢完全由珠光体和退火状态的渗碳体组成，因此高于此点硬度增加并不多。
Above this point the hardness can be increased only slightly, because steels above the eutectoid point are made up entirely of pearlite and cementite in the annealed state.
通过对在疲劳载荷作用下渗碳齿轮钢次表层亚结构的观察发现有持续滑移带形成。
The persistent slip bands were determined by the observations of the substructure near the surface of gear steels on fatigue load.
对2 0钢渗碳后的淬火应力与畸变进行了有限元计算。
The quenching stress and distortion of carburized 20 steel are calculated by finite element.
经淬火及回火后的合金层具有高速钢组织及性能。对渗金属层渗碳后的组织进行了电子显微分析。
The carburized alloyed layer possesses high density of finery and dispersed alloy carbides for the high concentrations of W, Mo and their affinities with carbon.
本文探讨了2 0钢在铸铁浴中经不同温度及时间渗碳的渗层组织。
The microstructure of carburized layer in 20 steel cast-iron molten bath carburized at different temperature and time was studied in the paper.
研究了热处理工艺对渗碳轴承钢组织、力学性能的影响规律，并探讨了强韧化机制。
The effect of heat treatment process on microstructure and mechanical properties of bearing steel was studied, and the mechanism of strengthening-toughening of the steel was also discussed.
当这种钢冷却时，就像图2.1的z - z线所示，除了初步的或预共析状态用渗碳体取代铁素体外，其余类似亚共析钢的情况。
When such steel cools, as shown in zz 'of Fig. 2.1 the process is similar to the hypo-eutectoid case, except that the primary or pro-eutectoid phase is now cementite instead of ferrite.
当这种钢冷却时，就像图2.1的z - z线所示，除了初步的或预共析状态用渗碳体取代铁素体外，其余类似亚共析钢的情况。
When such steel cools, as shown in zz 'of Fig. 2.1 the process is similar to the hypo-eutectoid case, except that the primary or pro-eutectoid phase is now cementite instead of ferrite.
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