Experimental study and simulation on the chip sticking–welding of the carbide cutter’s rake face

Chen, Jinguo; Zheng, M.Y.; Li, Pengfei; Feng, Jingyang; Sun, Yushuang

doi:10.1007/s12008-017-0403-2

Cited by 4 publications

(2 citation statements)

References 13 publications

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“…In fact, bond breakage is commonplace in many popular iron-carbon alloys, nickel-based alloys and titanium alloys. After cutting stainless steel and other materials with cemented carbide tools, some scholars pointed out that the element diffusion of congeners will bond the chips with the rake face and the loss of tungsten will reduce the hardness of tool material, leading to bond breakage [1][2][3][4]; In addition, they also conducted a series of diffusion experiments, established the theoretical model of element diffusion in the tool, and determine the damage threshold. Through the cutting of 508III steel with cemented carbide tools, Cheng et al [5] identified the bonding layer formed on the tool-chip interface, under the action of force-thermal coupling field, as the fundamental cause of bond breakage, and concluded that bond breakage of cemented carbide tools is a shared problem in the cutting of various chip materials.…”

Section: Introductionmentioning

confidence: 99%

Impacts of Element Diffusion on Bond Breakage of Cemented Carbide Cutter

Zheng¹,

Gao²,

Chen³

et al. 2019

ACSM

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To disclose the impacts of element diffusion on bond breakage of cemented carbide cutter, this paper establishes a rational microscale model of cemented carbide and 2.25Cr1Mo0.25V, in the light of the working conditions in the cutting process. Drawing on the molecular dynamics (MD) theory, the MD simulation was carried out to set up the deterioration layer model of cemented carbide cutter. Then, the author computed the bonding energy and interaction parameters between WC and other elements (e.g. Co, Fe, Cr, Mo and V). The results show that element diffusion will happen between cemented carbide and 2.25Cr1Mo0.25V in the temperature range of the bond failure; In the temperature range of the bond failure, the WC can form a stable alloy with proper concentrations of Co and other elements in the 2.25Cr1Mo0.25V; Fe is the leading influencing factor on the bonding ability of WC particles in the cemented carbide deterioration layer.

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Section: Introductionmentioning

confidence: 99%

Impacts of Element Diffusion on Bond Breakage of Cemented Carbide Cutter

Zheng¹,

Gao²,

Chen³

et al. 2019

ACSM

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“…By using different durations of heat preservation in the diffusion couple experiment, it was discovered that the tool side close to the diffusion interface was a Co-rich area where no WC was found on the titanium side, whereas the tool elements were also found in the bonded titanium layer on the tool surface after the cutting experiment; this confirmed that the dissolution and compositional changes of the WC in the cemented carbide tool degraded the mechanical properties of the tool surface, eventually leading to crater wear. Chen et al, (2017) studied the tool-chip stick-welding approach and welding layer formation conditions of the carbide cutter's rake face and obtained the trends in the cutting temperature and the state of the stick-welding for different parameters. Tong et al, (2009) put forward the concept of metal gradient structure shafts and investigated the microstructure and diffusion behavior of Cr and the variation in the interfacial micro-hardness of a 25Cr5MoA/Q235 clad shaft.…”

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Experimental study on elements diffusion of carbide tool rake face in turning stainless steel

Zheng

Chen

et al. 2018

JAMDSM

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Affected by high temperature and pressure during the process of cutting stainless steel, the affinity element diffusion of tool-chips leads to the appearance of adhesion on the rake face, which eventually results in adhesion failure of the tool. In this study, we determined the formation of tool-chip adhesion during the cutting process using a cutting test; and put forward an experimental scheme of the element diffusion for clamped and welded specimens of the tool and workpiece. Fick's second law was used to develop a theoretical model of element diffusion to analyze the effect of tool-chip adhesion on the Fe and W element diffusion coefficient of Fe and W. The hardness of the tool surface was measured and analyzed after the diffusion experiment. The results showed that the tool-chip adhesion on the rake face of the tool was similar to pressure diffusion welding and that the tool-chip adhesion on the rake face directly affected the diffusion concentration of W, but had little effect on the diffusion concentration of Fe. In addition, the diffusion coefficient of Fe or W in the tool-chip adhesion is always greater for stick-welding than for non-stick-welding. The research results are of great significance for improving the cutting performance and tool life.

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