Sandvik Mining and Construction Tools Ab

Ida Borgh

Malin Martensson

Ioannis Arvanitidis

Mirjam Lilja

Malin Mårtensson

Krystof Turba

Jose Maria Tarrago Cifre

José Maria TarragÓ Cifre

Joannis Arvanitidis

A rock drill insert made of cemented carbide includes hard constituents of tungsten carbide (WC) in a binder phase of Ni—Cr, or Ni—Co—Cr, and a balance of WC and unavoidable impurities. The cemented carbide has a 3.5-18 wt % binder phase. The binder phase has >0 wt % Ni. The mass ratio Cr/(Ni+Co) is 0.02-0.19. A difference between the hardness at 0.3 mm depth at some point of the surface of the rock drill insert and the minimum hardness of the bulk of the rock drill insert is at least 30 HV3.

Rock drill insert

Growing community of inventors

Stockholm, Sweden

Ida Borgh