Zhangqiu Ruinian Casting and Forging co,LTD

Zhangqiu Ruinian Casting and Forging co,LTD

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Name: Liu Gang
Tel: +86-531-83809583
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CALCULATION OF WEAR RATE

Author: Date:2011-10-9 9:12:08
A common used equation to compute the wear rate is (Archard,1953).

          Vi =ki F s

where F is the normal load, s the sliding distance, Vi the wear volume and ki the specific wear rate coefficient. Index i identifies the surface considered.

The k-value is given in m3/Nm or m2/N, sometimes in mm3/Nm. From design view the wear displacement h is more convenient than V. With hi =Vi /A, the contact pressure p=F/A where A is the area subjected to wear then:

          hi =ki p s

The sliding distance s can be replaced by s=v.t where v is the mean value for the slide rate and t the running time.

Because the k-value depends just like the friction coefficient on a lot of parameters this factor is to be find experimentally.
 

[10-15 m3/Nm] class Examples
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class 2/3: with teflon re-enforced bronze - tempered steel, dry.
class 3: hardwearing plastics - tempered steel, moderate load, dry.
class 4: bronze (Pb) - tempered steel, after running in, boundary lubricated fatty oil.
class 7: grinding.