The Influence of Chemical Composition upon the Hardness of Brake Shoes Meant for Rolling Stock

摘要

The paper introduces the multiple 2nd degree correlations between the hardness of the brake shoes used by the rolling stock and the content of carbon, phosphorus and sulphur of the phosphorous cast iron they are made of. The graphic correlations allow the determination of the variation limits for the independent parameters so as to range the values of the dependent parameters within a given domain.