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首页> 外文期刊>Journal of the Brazilian Society of Mechanical Sciences and Engineering >The use of cylindrical grinding to produce a martensitic structure on the surface of 4340 Steel
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The use of cylindrical grinding to produce a martensitic structure on the surface of 4340 Steel

机译：使用圆柱磨在4340钢的表面上产生马氏体组织

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摘要

Grinding is one of the most widely used manufacturing processes and, in the last few decades, has developed considerably. An example of these developments is hardening by grinding, an operation that is being studied to provide an option to the conventional hardening processes. This study presents the use of a cylindrical grinding process to produce a martensitic structure on the surface of SAE 4340 steel workpieces, and aims at adjusting the parameters of this process. To do much, a set of experiments were carried out using three cycles of grinding: the first one just to obtain a workpiece with regular diameter; the second cycle is that which will provide heating and cooling of the ground workpiece; and the last cycle is to provide corrections to the dimensions and roughness. Results of the experiments showed that hardening by grinding is possible and that the workpiece achieved hardness levels compatible to those provided by the conventional hardening processes. The use of such a process for surface hardening purposes has been researched and developed with a view to increasing the productivity of the process, ensuring dimensional and surface quality, in addition to mechanical resistance.
机译：磨削是使用最广泛的制造工艺之一，并且在过去的几十年中，磨削已经取得了长足的发展。这些发展的一个例子是通过磨削硬化，正在研究一种为传统淬火工艺提供选择的操作。这项研究提出了使用外圆磨削工艺在SAE 4340钢工件表面上产生马氏体结构的方法，旨在调整该工艺的参数。为了完成很多工作，使用三个磨削周期进行了一组实验：第一个磨削只是为了获得具有规则直径的工件;第二个磨削是为了获得直径相等的工件。第二个循环是加热和冷却被研磨工件的循环。最后一个周期是对尺寸和粗糙度进行校正。实验结果表明，通过磨削进行硬化是可能的，并且工件达到的硬度水平与常规硬化过程所提供的硬度水平相适应。已经研究和开发了将这种方法用于表面硬化的目的，以提高该方法的生产率，除了机械阻力之外，还确保尺寸和表面质量。

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