Active Standard: B611 - 13
This test has been in existence for at least thirty years and it has been the gold standard for abrasion testing of cemented carbides. ASTM G-65 is considered by some industrial users to be not aggressive enough to rank cemented carbides. This test is more aggressive because it uses aluminum oxide v sand; it uses larger grit, 30 v 50/70; it uses a 50 lb normal force v 30 lb (Procedure A); it uses a steel wheel v. a rubber wheel.. Thus, this test is a high-stress version of our ASTM G-65 test. This new standard was written from scratch only using the B 611 specification as the reference for key test rig requirements and test conditions. The B 611 document is appended. One key test condition has been modified. The wheel speed was reduced from 100 rpm to 50 rpm and the test duration was changed from 1,000 wheel revolutions to 2,000 revolutions. This was done based upon use of this test to evaluate hard metals and ceramics. There is less specimen bounce and the test seems much smoother. The reduced speed version has been used for several years by one lab and there appears to be no problems comparing new data to old data since the sliding distance is the same. A 100-rpm procedure could be added if requested by users. In summary, this is a useful and repeatable test that needs to be in ASTMs repertoire of abrasion tests. It is the G2 committees high-stress abrasion test and this type of abrasion is of significant commercial interest. For example, the petroleum industry has determined that this test simulates down-hole drilling better than many other tests.
Keywordsabrasion resistance; abrasive wear; abrasive wear resistance; cemented carbides; hardmetals; powder metallurgy; wear number;
Ballot Item Approved as B611-2013 and Pending Publication