过共析钢是含碳量大于共析量的钢。
Hypereutectoid steels are steels that contain greater than the eutectoid amount of carbon.
此处理方法对必须机加工的过共析钢特别有用。
This treatment is particularly useful for hypereutectoid steels that must be machined.
含碳量少于共析体(低于0.77%)的钢称为亚共析钢。
Steels having less than the eutectoid amount of carbon (less than 0.77%) are known as hypo-eutectoid steels.
含碳量少于共析体(低于0.77%)的钢称为亚共析钢。
Steels shaving less than the eutectoid amount of carbon (less than 0.77%) are known as hypo-eutectoid steels.
硼有加速珠光体成长率的作用，无论在亚共析或共析钢中皆有同样的现象产生。
It was found by experiments thatboron increased the growth rate of pearlite, both in hypoeutectoid and eutectoid steels.
研究了两种基体的亚共析钢经激光处理后，其硬化层的硬度梯度及其磨损特性。
The hardening gradient and the character of abrasion in hardening layer of hypoeutectoid steel with two kinds of matrixes that was treated by laser beam have been studied.
钢含磷量提高到0．9％以上，控制钢丝的热处理制度，使过共析钢丝强韧性显著提高。
The strength and tenacity of super-eutectoid steel wire have been improved notably by increasing the carbon content of the steel to more than 0.9% and controlling the heat-treatment system.
由于恰好高于低临界温度通常使过共析钢奥氏体化而硬化，所以对外层采用较低的热处理温度。
The lower heat-treating temperature of the case results from the fact that hypereutectoid steels are normally austenitized for hardening just above the lower critical point.
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.
结果表明，对于亚共析钢，在中温区变形、保温后可使先共析铁素体和珠光体组织大大细化，显著改善钢中铁素体和珠光体的分布状况；
The results show that, in hypoeutectoid steels, deformation at medium temperature may fine the structure and improve the distribution of ferrite and pearlite greatly;
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.
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.
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