英语翻译Machinability Of SteelsBecause steels are among the most important engineering materials (as noted in Chapter 5),their machinability has been studied extensively.The machinability of steels has been mainly improved by adding lead and sulf

英语翻译Machinability Of SteelsBecause steels are among the most important engineering materials (as noted in Chapter 5),their machinability has been studied extensively.The machinability of steels has been mainly improved by adding lead and sulf
英语翻译
Machinability Of Steels
Because steels are among the most important engineering materials (as noted in Chapter 5),their machinability has been studied extensively.The machinability of steels has been mainly improved by adding lead and sulfur to obtain so-called free-machining steels.
Resulfurized and Rephosphorized steels.
Sulfur in steels forms manganese sulfide inclusions (second-phase particles),which act as stress raisers in the primary shear zone.As a result,the chips produced break up easily and are small; this improves machinability.The size,shape,distribution,and concentration of these inclusions significantly influence machinability.Elements such as tellurium and selenium,which are both chemically similar to sulfur,act as inclusion modifiers in resulfurized steels.
Phosphorus in steels has two major effects.It strengthens the ferrite,causing increased hardness.Harder steels result in better chip formation and surface finish.Note that soft steels can be difficult to machine,with built-up edge formation and poor surface finish.The second effect is that increased hardness causes the formation of short chips instead of continuous stringy ones,thereby improving machinability.
Leaded Steels.A high percentage of lead in steels solidifies at the tip of manganese sulfide inclusions.In non-resulfurized grades of steel,lead takes the form of dispersed fine particles.Lead is insoluble in iron,copper,and aluminum and their alloys.Because of its low shear strength,therefore,lead acts as a solid lubricant (Section 32.11) and is smeared over the tool-chip interface during cutting.This behavior has been verified by the presence of high concentrations of lead on the tool-side face of chips when machining leaded steels.
When the temperature is sufficiently high-for instance,at high cutting speeds and feeds (Section 20.6)—the lead melts directly in front of the tool,acting as a liquid lubricant.In addition to this effect,lead lowers the shear stress in the primary shear zone,reducing cutting forces and power consumption.Lead can be used in every grade of steel,such as 10xx,11xx,12xx,41xx,etc.Leaded steels are identified by the letter L between the second and third numerals (for example,10L45).(Note that in stainless steels,similar use of the letter L means “low carbon,” a condition that improves their corrosion resistance.

英语翻译Machinability Of SteelsBecause steels are among the most important engineering materials (as noted in Chapter 5),their machinability has been studied extensively.The machinability of steels has been mainly improved by adding lead and sulf
钢的切削加工性能
由于钢是其中最重要的工程材料(如第5章),其切削加工性能进行了研究广泛.其切削加工性能的主要钢中铅、硫得到所谓的高速切削钢.
加硫钢和含磷钢钢.
在钢中硫物(二硫化锰的形式,而这些粒子)在主要的剪切应力消除.作为一个结果,芯片的分手,是很容易产生小的;这改进加工过程.在大小、形状、分配、夹杂物浓度的显著影响切削性能.元素碲、硒等,都是相似的,包含硫,
在钢中有两个主要磷效果.加强了铁氧体,导致增加硬度.结果更好更钢片形成和表面光洁度.注意,软碳钢很难机,采用装配式边形成和可怜的表面光洁度.第二个原因是增加硬度效果的形成、短而不是连续的芯片,从而提高了加工过程.
铅钢.一高比例的铅钢强化作用于锰硫化物夹杂物.在非加硫钢等级的钢、铅的分散微粒.铅是不溶于铁、铜、铝及其合金.因其较低的剪切强度,因此,领导充当一个固体润滑剂(部分),是涂抹在刀—屑接触区接口在切割.这种行为被证实存在高浓度的铅的侧面加工的刀位控制铅钢片所加工.
当温度高,比如说,在充分高压绝缘试验切削速度、饲料(区)-铅融化拿下20.6直接在前面的工具,作为液体润滑剂.此外,这种效果,降低应力在小学剪切带、降低切削力和功耗.铅可以应用于各个年级的钢铁,如10xx,11xx 12xx,41xx,等等.铅钢是由字母L之间的第二个和第三个数字(例如,10L45).(值得注意的是,在不锈钢、相似字母L手段的“低碳”,这是一种状态,提高他们的耐蚀性.

我有充分的理由相信，没有人会接你这篇文章，就算是接了，也是机译的。
楼主请自重，勿要轻视脑力劳动价值。

偶用的是有道道具桌面词典，推荐你去下载，还不错的。
钢的切削加工性能

由于钢是其中最重要的工程材料(如第5章),其切削加工性能进行了研究广泛。其切削加工性能的主要钢中铅、硫得到所谓的free-machining钢。

Resulfurized和Rephosphorized钢。
在钢中硫物(二硫化锰的形式,而这些粒子)在主要的剪切...

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偶用的是有道道具桌面词典，推荐你去下载，还不错的。
钢的切削加工性能

由于钢是其中最重要的工程材料(如第5章),其切削加工性能进行了研究广泛。其切削加工性能的主要钢中铅、硫得到所谓的free-machining钢。

Resulfurized和Rephosphorized钢。
在钢中硫物(二硫化锰的形式,而这些粒子)在主要的剪切应力消除。作为一个结果,芯片的分手,是很容易产生小的;这改进加工过程。在大小、形状、分配、夹杂物浓度的显著影响切削性能。元素碲、硒等,都是相似的,包含硫,充当修饰语在resulfurized钢。

在钢中有两个主要磷效果。加强了铁氧体,导致增加硬度。结果更好更钢片形成和表面光洁度。注意,软碳钢很难机,采用装配式边形成和可怜的表面光洁度。第二个原因是增加硬度效果的形成、短而不是连续的芯片,从而提高了加工过程。

铅钢。一高比例的铅钢强化作用于锰硫化物夹杂物。在non-resulfurized等级的钢、铅的分散微粒。铅是不溶于铁、铜、铝及其合金。因其较低的剪切强度,因此,领导充当一个固体润滑剂(部分),是32.11涂抹在tool-chip接口在切割。这种行为被证实存在高浓度的铅的tool-side时的铅钢片加工。


当温度高,比如说,在充分high-for切削速度、饲料(区)-铅融化拿下20.6直接在前面的工具,作为液体润滑剂。此外,这种效果,降低应力在小学剪切带、降低切削力和功耗。铅可以应用于各个年级的钢铁,如10xx,11xx 12xx,41xx,等等。铅钢是由字母L之间的第二个和第三个数字(例如,10L45)。(值得注意的是,在不锈钢、相似字母L手段的“低碳”,这是一种状态,提高他们的耐蚀性

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