Wear-resistant iron-based alloy compositions comprising nickel
AssigneeHöGanäS AB (Publ)
InventorsBarbara Maroli, Robert Frykholm, Sven Bengtsson, Karin Frisk
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Abstract
An iron-based alloy composition including: boron (B): 1.6-2.4 wt. %; carbon (C): 1.7-3.0 wt. %; molybdenum (Mo): 16.0-19.5 wt. %; nickel (Ni): 3.5-6.5 wt. %; manganese (Mn): below 0.8 wt. %; silicon (Si): 0.2-3.0 wt. %; vanadium (V): 10.8-13.2 wt. %; and balanced with iron (Fe). Also, an item including a substrate portion and a hardfacing coating bonded to the substrate portion, wherein the hardfacing coating is made by an overlay welding process using the iron-based alloy composition.
Claims22
An iron-based alloy composition consisting of:
- boron (B):
- 1.6-2.4 wt. %;
- carbon (C):
- 1.7-3.0 wt. %;
- molybdenum (Mo):
- 16.0-19.5 wt. %;
- nickel (Ni):
- more than 4 wt % and up to 6.5 wt %;
- manganese (Mn):
- below 0.8 wt. %;
- silicon (Si):
- more than 1 wt % and up to 3.0 wt. %;
- vanadium (V):
- 10.8-13.2 wt. %;
- chromium (Cr):
- up to 0.3 wt %;
- and
- balanced with iron (Fe) and unavoidable impurities,
- wherein the alloy has a microstructure comprising primary boride and eutectic matrix, wherein a ratio of an amount of primary boride by volume to an amount of eutectic matrix by volume is below 0.3.
An item comprising a substrate portion and a coating bonded to the substrate portion, wherein the coating is made using an iron-based alloy composition as a coating material, wherein the iron-based alloy composition consists of:
- boron (B):
- 1.6-2.4 wt. %;
- carbon (C):
- 1.7-3.0 wt. %;
- molybdenum (Mo):
- 16.0-19.5 wt. %;
- nickel (Ni):
- more than 4 wt % and up to 6.5 wt. %;
- manganese (Mn):
- below 0.8 wt. %;
- silicon (Si):
- more than 1 wt % and up to 3.0 wt. %;
- vanadium (V):
- 10.8-13.2 wt. %;
- chromium (Cr):
- up to 0.3 wt %;
- and
- balanced with iron (Fe) and unavoidable impurities,
- wherein the coating has a microstructure comprising primary boride and eutectic matrix, wherein a ratio of an amount of primary boride by volume to an amount of eutectic matrix by volume is below 0.3.
Method of hardfacing a substrate, the method comprising the steps of:
- providing a substrate;
- applying a coating to the substrate using an iron-based alloy composition as a coating material, wherein the iron-based alloy composition consists of:
- boron (B):
- 1.6-2.4 wt. %;
- carbon (C):
- 1.7-3.0 wt. %;
- molybdenum (Mo):
- 16.0-19.5 wt. %;
- nickel (Ni):
- more than 4 wt % and up to 6.5 wt. %;
- manganese (Mn):
- below 0.8 wt. %;
- silicon (Si):
- more than 1 wt % and up to 3.0 wt. %;
- vanadium (V):
- 10.8-13.2 wt. %;
- chromium (Cr):
- up to 0.3 wt %;
- and
- balanced with iron (Fe) and unavoidable impurities,
- wherein the coating has a microstructure comprising primary boride and eutectic matrix, wherein a ratio of an amount of primary boride by volume to an amount of eutectic matrix by volume is below 0.3.
Dependencies are inferred from the claim text.