The invention relates to a cold rolled and pre-hardened martensitic steel strip for flapper valve reeds in the compressors, wherein the steel strip is made from steel comprising in weight % (wt. %): C 0.9 - 1.1 Si 0.1 - 0.5 Mn 0.2 - 0.8 Cr 0.05 – 0.3 V 0.05 - 0.20 Nb 0.02 - 0.09 optional elements, Fe and impurities balance, wherein the steel strip has a matrix comprising tempered martensite and up to 8% area fraction of remaining secondary carbides and wherein the steel strip has a thickness of 0.07- 3.5 mm and a width of 7- 450 mm.
C21D 1/25 - Hardening, combined with annealing between 300 °C and 600 °C, i.e. heat refining ("Vergüten")
C21D 9/02 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for springs
F16F 1/02 - Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
2 and a hardness of 57-66 HRC in the hardened and tempered condition and wherein the blade is made from a steel, which comprises the following main components (in wt. %): C: 1.2-1.5; Si: 0.1-0.8; Mn: 0.1-0.7; Cr: 4.2-5.2; Mo: 3.0-4.0; V: 3.2-4.2; N: 0.01-0.15; balance Fe and impurities.
C21D 9/18 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for knives, scythes, scissors, or like hand cutting tools
B22F 3/24 - After-treatment of workpieces or articles
B22F 9/08 - Making metallic powder or suspensions thereof; Apparatus or devices specially adapted therefor using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
C21D 1/18 - Hardening; Quenching with or without subsequent tempering
C21D 1/56 - General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
C21D 9/22 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for machine cutting tools
C21D 9/52 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for strips
B22F 5/00 - Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
The invention relates to a cold rolled and hardened martensitic/austenitic stainless steel strip for flapper valves in the compressors, wherein the steel strip is made from steel comprising in weight % (wt. %): C0.3 –0.5 Si0.2 –0.8 Mn 0.2 -1.0 Cr 12.0 –15.0 Mo 0.50 -2.00 N 0.02 -0.15 V 0.01 -0.20 has a matrix consisting of tempered martensite and between 5 and 15 volume % austenite and a tensile strength (Rm) of 1970-2300 MPa.
C22C 38/24 - Ferrous alloys, e.g. steel alloys containing chromium with vanadium
C21D 9/02 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for springs
C22C 38/46 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
F16F 1/02 - Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
The invention relates to a blade for creping a paper web from a Yankee cylinder surface, said blade comprising a steel substrate having a thickness of 0.7 mm -2 mm, the steel substrate is covered by a cermet coating that forms a working edge adapted for contact with said surface and a web impact area upon which the web impacts during crêping, wherein the cermet coating comprises chromium carbides and tungsten carbides in a nickel based metal matrix and wherein the cermet coating has a porosity of < 2 volume % and a hardness of > 1100 HV0.3.
The invention relates to a creping blade for the detachment of a travelling paper web from a dryer cylinder, said blade having a working edge to be placed against the cylinder, wherein the creping blade has a tensile strength of 1800-2500N/mm2 and a hardness of 57-66 HRC in the hardened and tempered condition and wherein the blade is made from a steel,which comprises the following main components (in wt. %):C:.2-1.5; Si: 0.1-0.8; Mn: 0.1-0.7; Cr: 4.2-5.2; Mo: 3.0-4.0; V: 3.2-4.2; N: 0.01-0.15; balance Fe and impurities.
06 - Common metals and ores; objects made of metal
07 - Machines and machine tools
Goods & Services
Common metals and their alloys; cold-rolled strip steel;
hot-rolled strip steel; wires and cables, non-electrical;
stainless steel in the form of bars, blocks, plates, rings,
wires, strips and tubes. Machines and machine tools; saw blades for machine saws and
band saws; doctor blades.
06 - Common metals and ores; objects made of metal
07 - Machines and machine tools
Goods & Services
Common metals and their alloys; cold-rolled strip steel;
hot-rolled strip steel; wires and cables, non-electrical;
stainless steel in the form of bars, blocks, plates, rings,
wires, strips and tubes. Machines and machine tools; saw blades for machine saws and
band saws; doctor blades.
06 - Common metals and ores; objects made of metal
07 - Machines and machine tools
Goods & Services
[Common metals and their alloys; cold-rolled strip steel; hot-rolled strip steel; wires and cables, non-electrical; stainless steel in the form of bars, blocks, plates, rings, wires, strips and tubes] Saw blades for machine saws and band saws [ ; machine parts, namely, doctor blades ]
06 - Common metals and ores; objects made of metal
Goods & Services
Common metals and their alloys; cold-rolled strip steel;
hot-rolled strip steel; wires and cables, non-electrical;
stainless steel in the form of bars, blocks, plates, rings,
wires, strips and tubes.
06 - Common metals and ores; objects made of metal
07 - Machines and machine tools
Goods & Services
Common metals and their alloys; cold-rolled strip steel; hot-rolled strip steel; wires and cables, non-electrical; stainless steel in the form of [ bars, blocks, ] plates, rings, wires, strips [ and tubes ] Saw blades for machine saws and band saws; machine parts, namely, doctor blades
06 - Common metals and ores; objects made of metal
Goods & Services
Common metals and their alloys; cold-rolled strip steel;
hot-rolled strip steel; wires and cables, non-electrical;
stainless steel in the form of bars, blocks, plates, rings,
wires, strips and tubes.
06 - Common metals and ores; objects made of metal
07 - Machines and machine tools
08 - Hand tools and implements
Goods & Services
Common metals and their alloys; cold-rolled strip steel; hot-rolled strip steel; wires and cables, non-electrical; stainless steel in the form of bars, blocks, plates, rings, wires, strips and tubes. Machines and machine tools; saw blades for machine saws and band saws; doctor blades. Hand operated tools; cutlery; forks and spoons; side arms, other than fire arms; saw blades for hand operated saws; razors, non-electric.
06 - Common metals and ores; objects made of metal
07 - Machines and machine tools
08 - Hand tools and implements
Goods & Services
Common metals and their alloys; cold-rolled strip steel; hot-rolled strip steel; wires and cables, non-electrical; stainless steel in the form of bars, blocks, plates, rings, wires, strips and tubes. Machines and machine tools; saw blades for machine saws and band saws; doctor blades. Hand operated tools; cutlery; forks and spoons; side arms, other than fire arms; saw blades for hand operated saws; razors, non-electric.
