FIELD: metallurgy, casting production, machine engineering, possibly production of cast pieces of gray hypoeutectic cast iron operating at condition of high wear such as brake shoes of rail road cars, large-size gear wheels, cylinder sleeve, parts of capstan.
SUBSTANCE: method comprises steps of using zirconium dioxide (ZrO2) as zirconium containing additive and using silica (SiO2) as silicon containing additive. Components are selected in next relation, mass %: SiO2, 35 - 45; ZrO2, 35 - 45; Al, 10 - 20. Modifying agent is added in quantity 0.02% of mass of gray cast iron in ladle. Invention allows increase by 1.3 times wear resistance of castings of gray hypoeutectic cast iron operating in condition of intensive wear.
EFFECT: increased wear resistance at keeping high strength and deflection, restricted hardness due to lowered specific volume of melt gray cast iron at casting and sharply reduced volumetric shrinkage.
4 tbl, 7 ex
| Title | Year | Author | Number |
|---|---|---|---|
| MODIFIER | 2008 |
|
RU2366741C1 |
| METHOD FOR MODIFICATION OF CAST IRON | 2015 |
|
RU2588965C1 |
| BRIQUETTED MIXTURE FOR INOCULATION OF GRAY IRON | 1997 |
|
RU2124566C1 |
| ALLOY BASED ON IRON-CARBON SYSTEM FOR CASTING OF WEAR-RESISTANCE ARTICLES AND METHOD OF ALLOY PRODUCTION | 1997 |
|
RU2109837C1 |
| HIGH STRENGTH IRON | 2009 |
|
RU2413026C1 |
| METHOD OF PRODUCING CAST IRON WITH VERMICULAR GRAPHITE | 0 |
|
SU1715856A1 |
| METHOD OF PRODUCING WEAR-RESISTANT WHITE IRON | 2009 |
|
RU2412780C1 |
| IRON PRODUCTION METHOD | 1991 |
|
RU2016071C1 |
| WEAR-RESISTANT CAST IRON FOR CASTS | 0 |
|
SU1357455A1 |
| MODIFYING MIX | 2002 |
|
RU2226554C1 |
