Abstract
Crankshaft manufacture has always demanded the combination of a high degree of practical skill with technical knowledge. The first part of this paper deals with the actual practice of forging. It describes the changes in technique which have taken place to meet the amended requirements of designers. The production of crankshaft forgings by the Continuous Grain Flow (C.G.F.) process is described and comparison is made with similar forgings made by other methods.
The second part deals with the metallurgical problems associated with crankshaft production, showing why Continuous Grain Flow crankshafts are superior. It includes a description of the test programme undertaken by the British Internal Combustion Engine Research Institute which attempts to evaluate this superiority and gives some of the results obtained from this test programme.
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