Adhesive wear in sliding

The end of a rod made of mild steel is sliding over the unlubricated surface of hardened tool steel with a load of 100 kg. The hardness of mild steel is 150 HB. What is the distance traveled to produce a wear volume of 1 m $m^3$ by adhesive wear of the mild steel rod?

Question

Adhesive wear in sliding

The end of a rod made of mild steel is sliding over the unlubricated surface of hardened tool steel with a load of 100 kg. The hardness of mild steel is 150 HB. What is the distance traveled to produce a wear volume of 1 m[latex]m^3[/latex] by adhesive wear of the mild steel rod?

Accepted Answer

The parameters in Eq. (4.6) for adhesive wear are as follows:

[latex]V=k\frac{LW}{3p}[/latex] (4.6)

[latex]\begin{aligned}V &=1 \mathrm{~mm}^{3} ; \k &=10^{-2}( ext { from Table }(4.2);\W&=100\mathrm{~kg}\p&=150\mathrm{~kg}\mathrm{mm}^{2} .\end{aligned}[/latex]

Therefore, the distance traveled is

[latex]L=\frac{3 V p}{k W}=\frac{(3)(1)(150)}{\left(10^{-2} ight)(100)}=450 \mathrm{~mm}[/latex]

TABLE 4.2
Approximate Order of Magnitude for the Wear Coefficient, k, in Air
Unlubricated	k	Lubricated	k
Mild steel on mild steel	[latex]10^{-2} to 10^{-3}[/latex]	52100 steel on 52100 steel	[latex]10^{-7} to 10^{-10}[/latex]
6040 brass on hardened root steel	[latex] 10^{-3}[/latex]	Aluminum bronze on	[latex] 10^{-8}[/latex]
Hardened tool steel on hardened	[latex] 10^{-4}[/latex]	hardened steel	[latex] 10^{-9}[/latex]
tool steel		Hardened steel on	[latex] 10^{-9}[/latex]
Polytetrafluoroethylene (PTFE) on tool steel	[latex] 10^{-5}[/latex]	hardened steel	[latex] 10^{-9}[/latex]
Tungsten carbide on mild steel	[latex] 10^{-6}[/latex]

Question 4.2: Adhesive wear in sliding The end of a rod made of mild steel...

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