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US 2021/0069864 A1Published application
Shot used for blast processing
AssigneeSintokogio, Ltd.
InventorsYuto KATO, Masayuki ISHIKAWA, Naoya TANUMA, Hayato TANIGUCHI
Life of this patent
Estimating the term…
Abstract
The present disclosure relates to a shot used for blast processing, the shot being made of an iron-based alloy containing C: 0.20 to 0.50% by mass, Si: 0.50 to 1.10% by mass, and Mn: 0.50 to 1.15% by mass as additive elements, in which a mass ratio of C to Si is 0.30 to 0.75, a mass ratio of C to Mn is 0.30 to 0.75, and a mass ratio of Si to Mn is 0.70 to 1.60, and a Vickers hardness of the shot is HV 400 to 800.
Claims20
1:
- A shot used for blast processing,
- the shot being made of an iron-based alloy containing C:
- 0.20 to 0.50% by mass, Si:
- 0.50 to 1.10% by mass, and Mn:
- 0.50 to 1.15% by mass as additive elements, wherein
- a mass ratio of the C to the Si is 0.30 to 0.75, a mass ratio of the C to the Mn is 0.30 to 0.75, and a mass ratio of the Si to the Mn is 0.70 to 1.60, and
- a Vickers hardness of the shot is HV 400 to 800.
4 more elements
2:
- The shot according to claim 1, wherein the total content of the C, the Si, and the Mn is 1.80 to 2.40% by mass.
3:
- The shot according to claim 1, wherein the iron-based alloy further contains 0.30 to 1.0% by mass of at least one element selected from the group consisting of Cr, Ni, Cu, Mo, Al, B, V, Nb, and Ti.
4:
- The shot according to claim 1, wherein the shot is substantially formed from a tempered martensite phase.
5:
- The shot according to claim 1, wherein the number of particles having blowholes is 5% or less of the entire shot.
6:
- The shot according to claim 1, wherein, when a length of the particle in a longitudinal direction is designated as L and a maximum diameter in a direction perpendicular to the longitudinal direction is designated as S, the number of the particles in which L/S is 2.0 or more is 5% or less of the entire shot.
7:
- The shot according to claim 2, wherein the iron-based alloy further contains 0.30 to 1.0% by mass of at least one element selected from the group consisting of Cr, Ni, Cu, Mo, Al, B, V, Nb, and Ti.
8:
- The shot according to claim 2, wherein the shot is substantially formed from a tempered martensite phase.
9:
- The shot according to claim 3, wherein the shot is substantially formed from a tempered martensite phase.
10:
- The shot according to claim 2, wherein the number of particles having blowholes is 5% or less of the entire shot.
11:
- The shot according to claim 3, wherein the number of particles having blowholes is 5% or less of the entire shot.
12:
- The shot according to claim 4, wherein the number of particles having blowholes is 5% or less of the entire shot.
13:
- The shot according to claim 2, wherein, when a length of the particle in a longitudinal direction is designated as L and a maximum diameter in a direction perpendicular to the longitudinal direction is designated as S, the number of the particles in which L/S is 2.0 or more is 5% or less of the entire shot.
14:
- The shot according to claim 3, wherein, when a length of the particle in a longitudinal direction is designated as L and a maximum diameter in a direction perpendicular to the longitudinal direction is designated as S, the number of the particles in which L/S is 2.0 or more is 5% or less of the entire shot.
15:
- The shot according to claim 4, wherein, when a length of the particle in a longitudinal direction is designated as L and a maximum diameter in a direction perpendicular to the longitudinal direction is designated as S, the number of the particles in which L/S is 2.0 or more is 5% or less of the entire shot.
16:
- The shot according to claim 5, wherein, when a length of the particle in a longitudinal direction is designated as L and a maximum diameter in a direction perpendicular to the longitudinal direction is designated as S, the number of the particles in which L/S is 2.0 or more is 5% or less of the entire shot.
17:
- The shot according to claim 1, containing particles with the average particle size of 0.1 to 1.5 mm.
18:
- The shot according to claim 1, wherein the iron-based alloy contains C:
- 0.30 to 0.45% by mass, Si:
- 0.55 to 1.05% by mass, and Mn:
- 0.55 to 1.00% by mass.
1 more element
19:
- The shot according to claim 1, wherein the mass ratio of the C to the Si is 0.35 to 0.60, the mass ratio of the C to the Mn is 0.35 to 0.60, and the mass ratio of the Si to the Mn is 0.80 to 1.40.
20:
- The shot according to claim 1, wherein the total content of the C, the Si, and the Mn is 1.85 to 2.25% by mass.