Cast steel for construction equipment bucket parts and parts for construction equipment bucket comprising the same
View Patent ↗The present disclosure relates to a cast steel for construction equipment bucket parts and parts for a construction equipment bucket manufactured by using the same, and the cast steel includes 0.27 to 0.34 wt % of carbon (C), 1.2 to 1.8 wt % of chromium (Cr), 0.8 to 1.7 wt % of silicon (Si), 1.0 to 1.4 wt % of manganese (Mn), 0.2 to 0.4 wt % of molybdenum (Mo), 0.2 to 0.4 wt % of nickel (Ni), and a balance of iron and impurities.
1. A cast steel for use with a construction equipment bucket part, comprising greater than 0.30 and less than or equal to 0.34 wt % of carbon (C), 1.2 to 1.8 wt % of chromium (Cr), 0.8 to 1.7 wt % of silicon (Si), 1.0 to 1.4 wt % of manganese (Mn), 0.2 to 0.4 wt % of molybdenum (Mo), 0.2 to 0.4 wt % of nickel (Ni), and a balance of iron and impurities, and
comprising MC carbide and at least one carbide selected from M 7 C 3 carbide, M 3 C 2 carbide and M 23 C 6 carbide in a structure thereof,
wherein the MC carbide is comprised in an amount of 15 to 45 vol % based on a total 100 vol % of the entire carbides.
2. The cast steel of claim 1 , wherein the MC carbide is comprised in crystal particles of the cast steel, and at least one carbide selected from the M 7 C 3 carbide, the M 3 C 2 carbide and the M 23 C 6 carbide is comprised at a boundary of the crystal particles of the cast steel.
3. The cast steel of claim 1 , wherein a total content of the chromium (Cr), silicon (Si) and manganese (Mn) is 4.1 to 4.9 wt %.
4. The cast steel of claim 1 , further comprising 0.01 to 0.03 wt % of vanadium (V).
5. A part for use with a construction equipment bucket obtained by subjecting the cast steel of claim 1 to post-treatment.
6. The part of claim 5 , wherein the part is a tooth, a tooth adapter, a shroud or a cutter.
7. The part of claim 5 , wherein the MC carbide is comprised in crystal particles of the cast steel, and at least one carbide selected from the M 7 C 3 carbide, the M 3 C 2 carbide and the M 23 C 6 carbide is comprised at a boundary of the crystal particles of the cast steel.
8. The part of claim 5 , wherein a total content of the chromium (Cr), silicon (Si) and manganese (Mn) is 4.1 to 4.9 wt %.
9. The part of claim 5 , further comprising 0.01 to 0.03 wt % of vanadium (V).
10. A cast steel for use with a construction equipment bucket part, comprising greater than 0.30 and less than or equal to 0.34 wt % of carbon (C), 1.2 to 1.8 wt % of chromium (Cr), 0.8 to 1.7 wt % of silicon (Si), 1.0 to 1.4 wt % of manganese (Mn), 0.2 to 0.4 wt % of molybdenum (Mo), 0.2 to 0.4 wt % of nickel (Ni), and a balance of iron and impurities, and
comprising MC carbide and at least one carbide selected from M 7 C 3 carbide, M 3 C 2 carbide and M 23 C 6 carbide in a structure thereof,
wherein when a cut surface after cutting of the cast steel is analyzed by an image analyzer, a ratio (b/a) of an area (b) of the MC carbide to an area (a) of the entire carbide is 0.1 to 0.65 at the cut surface, and
wherein the MC carbide is comprised in crystal particles of the cast steel, and at least one carbide selected from the M 7 C 3 carbide, the M 3 C 2 carbide and the M 23 C 6 carbide is comprised at a boundary of the crystal particles of the cast steel.
11. A part for use with a construction equipment bucket obtained by subjecting the cast steel of claim 10 to post-treatment.
12. The part of claim 11 , wherein the part is a tooth, a tooth adapter, a shroud or a cutter.