The Roughness of the Hardened Steel Surface Created by the Rolling-Burnishing Process

Ścibiorski, B.; Dzionk, Stefan

doi:10.4028/www.scientific.net/ssp.220-221.881

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…The low plasticity burnishing process consists of plastic deformation of the processed surface [12,22,23]. A scheme of this process is in Figure 3.…”

Section: Introduction To Burnishing Processmentioning

confidence: 99%

The Possibilities of Improving the Fatigue Durability of the Ship Propeller Shaft by Burnishing Process

2020

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Heavily loaded structural elements operating in a corrosive environment are usually quickly destroyed. An example of such an element is a ship propeller operating in a seawater environment. This research presents a fatigue resistance test performed on elements operating in seawater. Different processing parameters applied on the samples in particular were compared with the specimens whose surface had been burnished differently and they were compared to specimens with a grinded surface. The research shows that the structural elements whose surface has been burnished can have up to 30% higher fatigue strength in a seawater environment than the elements whose surface has been grinded. During burnishing, an important feature of the process is the degree of cold rolling of the material. The resistance of the component to fatigue loads increases only to a certain level with increasing the degree of the cold rolling. Further increasing the degree of cold rolling reduces the fatigue strength. Introducing additional stresses in the components (e.g., assembly stresses) reduces the fatigue strength of this component in operation and these additional stresses should be accounted for while planning the degree of the cold rolling value. A device that allows for simultaneous turning and shaft burnishing with high slenderness is presented in the appendix of this article. This device can be connected to the computerized numerical control system and executed automatic process according to the machining program; this solution reduces the number of operations and cost in the process.

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“…The low plasticity burnishing process consists of plastic deformation of the processed surface [12,22,23]. A scheme of this process is in Figure 3.…”

Section: Introduction To Burnishing Processmentioning

confidence: 99%

The Possibilities of Improving the Fatigue Durability of the Ship Propeller Shaft by Burnishing Process

2020

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“…Tools for machining hard materials, for example, cutting inserts (CBN—cubic boron nitride, for machining hardened parts of up to 65 HRC) [19,20], are available in the market; however, obtaining the desired surface roughness parameters is not always possible. In this case, the surface can be improved by burnishing; however, this process has a different course than in case of burnishing soft materials [18,21,22,23,24]. The deformability of material is limited, and the smoothing of surface roughness occurs through material sliding, only within the roughness zone (there are generally no changes in the subsurface layer).…”

Section: Introductionmentioning

confidence: 99%

Surface Texture Analysis of Hardened Shafts after Ceramic Ball Burnishing

2019

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This article represents the results of testing the surface condition of shafts manufactured by the burnishing process. The shafts with a hardness of approximately 62 HRC (Rockwell C). were burnished with a ceramic ball (Si3N4), where the force range was controlled by the means of a hydraulic system. The machining process consisted of hard turning shafts with cubic boron nitride (CBN) inserts, followed by burnishing with the use of various machining parameters, such as feed and force. The research focused on the examination of burnished surfaces, which was conducted for various structures after hard turning, and with variable burnishing parameters. The results obtained for the decrease of roughness are presented as the relation between the parameters Rat/Rab, which is approximately 2, while for Rpkt/Rpkb, it is around 3.7, respectively. Sat/Sab is around 2, while Spkt/Spkb is around 3.5 (where an index denotes the t-surface after turning, and the index b-surface after burnishing). The structure of the surface after burnishing and turning is described with roughness parameters, as well as with the photographs of the specimen surface, and the bearing area curve.

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