F16F 1/02 - Springs made of steel or other material having low internal frictionWound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
2, and in the core portion, a numerical proportion of Ca sulfides with respect to a total number of oxide-based inclusions and sulfide-based inclusions is 0.20% or less.
F16F 1/02 - Springs made of steel or other material having low internal frictionWound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
C21D 1/18 - HardeningQuenching with or without subsequent tempering
C22C 38/54 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
B21C 1/00 - Manufacture of metal sheets, wire, rods, tubes or like semi-manufactured products by drawing
B21C 37/04 - Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided forManufacture of tubes of special shape of rods or wire
C21D 1/18 - HardeningQuenching with or without subsequent tempering
C21D 8/06 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
C21D 9/02 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for springs
C21D 9/52 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for wiresHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for strips
C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
C22C 38/34 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
C22C 38/42 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
C22C 38/44 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
C22C 38/46 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
C22C 38/48 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
C22C 38/50 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
F16F 1/02 - Springs made of steel or other material having low internal frictionWound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
A valve spring which has an excellent fatigue limit is provided. A chemical composition of the valve spring according to the present embodiment contains, in mass %, C: 0.50 to 0.80%, Si: 1.20 to less than 2.50%, Mn: 0.25 to 1.00%, P: 0.020% or less. S: 0.020% or less: Cr: 0.40 to 1.90%, V: 0.05 to 0.60%, Ca: 0.0001 to 0.0050%, and N: 0.0100% or less, with the balance being Fe and impurities. In the valve spring, a number density of V-based precipitates having a maximum diameter ranging from 2 to 10 nm is 5000 to 80000 pieces/μm3, and a numerical proportion of Ca sulfides with respect to a total number of oxide-based inclusions and sulfide-based inclusions is 0.20% or less.
A steel wire which has excellent cold coiling workability, and which has an excellent fatigue limit when made into a spring is provided. A chemical composition of the steel wire according to the present, embodiment containing, in mass %, C: 0.50 to 0.80%, Si: 1.20 to less than 2.50%, Mn: 0.25 to 1.00%, P: 0.020% or less, S: 0.020% or less, Cr: 0.40 to 1.90%, V: 0.05 to 0.60%, and N: 0.0100% or less, with the balance being Fe and impurities. In the steel wire, a number density of V-based precipitates having a maximum diameter ranging from 2 to 10 nm is 5000 to 80000 pieces/μm3.
C21D 9/52 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for wiresHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for strips
C22C 38/50 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
C22C 38/46 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
C22C 38/42 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
C22C 38/34 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
C22C 38/10 - Ferrous alloys, e.g. steel alloys containing cobalt
C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
A damper spring which has an excellent fatigue limit is provided. A chemical composition of the damper spring according to the present embodiment contains in mass %, C: 0.50 to 0.80%, Si: 1.20 to less than 2.50%, Mn: 0.25 to 1.00%, P: 0.020% or less, S: 0.020% or less, Cr: 0.40 to 1.90%, V: 0.05 to 0.60%, and N: 0.0100% or less, with the balance being Fe and impurities. In the damper spring, a number density of V-based precipitates having a maximum diameter ranging from 2 to 10 nm is 5000 to 80000 pieces/m3.
Provided is a steel wire that has excellent cold coiling machinability, and, when formed into a spring, has an excellent fatigue limit. The chemical composition of a steel wire according to the present embodiment contains, in mass%, 0.50% to 0.80% of C, 1.20% to less than 2.50% of Si, 0.25% to 1.00% of Mn, 0.020% or less of P, 0.020% or less of S, 0.40% to 1.90% of Cr, 0.05% to 0.60% of V, and 0.0100% or less of N, and the remainder is constituted by Fe and impurities. The number density of V-based precipitates having a maximum diameter of 2 nm to 10 nm is 5,000 to 80,000 per μm3.
C21D 7/06 - Modifying the physical properties of iron or steel by deformation by cold working of the surface by shot-peening or the like
C21D 8/06 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
C21D 9/02 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for springs
C21D 9/52 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for wiresHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for strips
Provided is a valve spring having an excellent fatigue limit. According to one embodiment, the chemical composition of this valve spring contains, by mass%, 0.50 to 0.80% of C, at least 1.20 to less than 2.50% of Si, 0.25 to 1.00% of Mn, 0.020% or less of P, 0.020% or less of S, 0.40 to 1.90% of Cr, 0.05 to 0.60% of V, 0.0001 to 0.0050% of Ca, and 0.0100% or less of N, Fe and impurities being the balance. The number density of V-based precipitates having a maximum diameter of 2 to 10 nm is 5,000 to 80,000 pcs./μm3; and the ratio of the number of Ca sulfides to the total number of oxide-based inclusions and sulfide-based inclusions is 0.20% or less.
C22C 38/34 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
C22C 38/54 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
F16F 1/02 - Springs made of steel or other material having low internal frictionWound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
C21D 7/06 - Modifying the physical properties of iron or steel by deformation by cold working of the surface by shot-peening or the like
C21D 8/06 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
C21D 9/02 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for springs
C21D 9/52 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for wiresHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for strips
Provided is a damper spring having an excellent fatigue limit. The damper spring according to the present embodiment has a chemical composition comprising, in % by mass, 0.50 to 0.80% of C, 1.20 or more and less than 2.50% of Si, 0.25 to 1.00% of Mn, 0.020% or less of P, 0.020% or less of S, 0.40 to 1.90% of Cr, 0.05 to 0.60% of V, 0.0100% or less of N, and a remainder comprising Fe and impurities, and has a number density of V-based precipitates each having a maximum diameter of 2 to 10 nm of 5000 to 80000 particles/μm3.
C22C 38/34 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
C22C 38/54 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
F16F 1/02 - Springs made of steel or other material having low internal frictionWound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
F16F 15/10 - Suppression of vibrations in rotating systems by making use of members moving with the system
C21D 7/06 - Modifying the physical properties of iron or steel by deformation by cold working of the surface by shot-peening or the like
C21D 8/06 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
C21D 9/02 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for springs
C21D 9/52 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for wiresHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for strips
The present invention provides a steel wire which is formed into a spring that has excellent fatigue limit. The chemical composition of a steel wire according to one embodiment of the present invention comprises, in mass%, from 0.53% to 0.59% of C, from 2.51% to 2.90% of Si, from 0.70% to 0.85% of Mn, 0.020% or less of P, 0.020% or less of S, from 1.40% to 1.70% of Cr, from 0.17% to 0.53% of Mo, from 0.23% to 0.33% of V, 0.050% or less of Cu, 0.050% or less of Ni, 0.0050% or less of Al, 0.050% or less of Ti, 0.0070% or less of N, from 0% to 0.0050% of Ca and from 0% to 0.020% of Nb, with the balance being made up of Fe and impurities. The number density of V-based precipitates (10) having a maximum diameter of from 2 nm to 10 nm is from 500 to 8,000 per μm2.
C21C 7/076 - Use of slags or fluxes as treating agents
C21D 7/06 - Modifying the physical properties of iron or steel by deformation by cold working of the surface by shot-peening or the like
C21D 8/06 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
C21D 9/02 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for springs
C21D 9/52 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for wiresHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for strips
C22C 38/50 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
F16F 1/02 - Springs made of steel or other material having low internal frictionWound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
The present invention provides a valve spring which has excellent fatigue limit. A valve spring according to one embodiment of the present invention is provided with: a nitride layer that forms the surface layer; and a core part that is positioned on the inner side of the nitride layer. The chemical composition of the core part comprises, in mass%, from 0.53% to 0.59% of C, from 2.51% to 2.90% of Si, from 0.70% to 0.85% of Mn, 0.020% or less of P, 0.020% or less of S, from 1.40% to 1.70% of Cr, from 0.17% to 0.53% of Mo, from 0.23% to 0.33% of V, from 0.0001% to 0.0050% of Ca, 0.050% or less of Cu, 0.050% or less of Ni, 0.0050% or less of Al, 0.050% or less of Ti and 0.0070% or less of N, with the balance being made up of Fe and impurities. The number density of V-based precipitates having a maximum diameter of from 2 nm to 10 nm in the core part is from 500 to 8,000 per μm2; and the number ratio of Ca sulfides to the total number of oxide-based inclusions and sulfide-based inclusions in the core part is 0.20% or less.
C21C 7/04 - Removing impurities by adding a treating agent
C21D 8/06 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
C21D 9/52 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for wiresHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for strips
F16F 1/02 - Springs made of steel or other material having low internal frictionWound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
F16F 1/06 - Wound springs with turns lying in cylindrical surfaces
The present invention provides a damper spring which has excellent fatigue limit. A damper spring according to one embodiment of the present invention is provided with: a nitride layer that forms the surface layer; and a core part that is positioned on the inner side of the nitride layer. The chemical composition of the core part comprises, in mass%, from 0.53% to 0.59% of C, from 2.51% to 2.90% of Si, from 0.70% to 0.85% of Mn, 0.020% or less of P, 0.020% or less of S, from 1.40% to 1.70% of Cr, from 0.17% to 0.53% of Mo, from 0.23% to 0.33% of V, 0.050% or less of Cu, 0.050% or less of Ni, 0.0050% or less of Al, 0.050% or less of Ti, 0.0070% or less of N and from 0% to 0.020% of Nb, with the balance being made up of Fe and impurities. The number density of V-based precipitates having a maximum diameter of from 2 nm to 10 nm in the core part is from 500 to 8,000 per μm2.
C21D 7/06 - Modifying the physical properties of iron or steel by deformation by cold working of the surface by shot-peening or the like
C21D 8/06 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
C21D 9/02 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for springs
C21D 9/52 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for wiresHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for strips
C22C 38/50 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
F16F 1/02 - Springs made of steel or other material having low internal frictionWound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
06 - Common metals and ores; objects made of metal
Goods & Services
Iron and steel; nonferrous metals and their alloys; metal
materials for building or construction; springs [metal
hardware]; metal hardware (excluding "security locks, keys
for locks, rings of metal for keys and padlocks"); wire
ropes; wire nets and gauzes.
