Wear-resistant iron-based Mn–Cu–Sn matrix for sintered diamond tools

ABSTRACT

The objective of the present work was to determine the suitability of a new iron-based Mn–Cu–Sn matrix alloy for the manufacture of diamond-impregnated tool components. A number of specimens were consolidated by the hot press route from ball-milled powders. Density, microstructural features, phase composition, bending properties and hardness were evaluated. The results revealed excellent mechanical properties, including σ_0.2 > 850 MPa in 3-point bending and HK0.5 > 300. A commercial Co-WC reference matrix alloy was also produced for comparison purposes. Diamond-impregnated specimens with different matrices were tested for wear rate on abrasive sandstone using a test rig specially designed to simulate tool application conditions. The tests that involved 3- and 2-body abrasion ranked the alloys in different orders. Statistical analysis showed that the wear rate of diamond-impregnated composites was mainly affected by diamond concentration, but statistically significant contribution of the matrix resistance to 3-body abrasion was also found.

KEYWORDS:

• Sintered diamond-impregnated tool
• hot pressing
• iron-based matrix
• abrasion resistance

Disclosure statement

No potential conflict of interest was reported by the authors.

ORCID

Elzbieta Baczek http://orcid.org/0000-0003-2139-761X

Additional information

Funding

The work was jointly supported by AGH-University of Science and Technology (No. 11.11.110.299) and by the Preludium Research Project (No. 2015/19/N/ST8/01050) grant funded the Polish National Science Centre.