Year1
- 产品规格：
- 齐全
Strength, hardness, elasticity and hardenability are all higher than that of grade steel. It has overheating sensitivity and tempering brittleness tendency, and water quenching has a tendency to form cracks. The machinability in the annealed state is acceptable, the cold deformation plasticity is low, and the weldability is poor. Leaf springs subject to medium loads, coil springs with diameters up to - and spring washers and spring rings. High wear-resistant parts, such as grinder spindles, spring chucks, precision machine tool screws, cutters, collars on spiral roller bearings, railway rails, etc.
Chemical composition
●Chemical composition:
Carbon:.~
Silicon:.~
Manganese.~
Sulfur:
Phosphorus:
Chromium:
Nickel
Copper:< br/> Mechanical properties
●Mechanical properties:
Tensile strength: ~
Elongation (): ~
Reduction of area (): not greater than
Hardness ：Hot rolling, hot rolling + heat treatment,
Heat treatment
●Heat treatment specifications and metallographic structure:
Heat treatment specifications: quenching 3℃℃, oil cooling and tempering ℃℃ (for special needs, 3 ℃).
Metallographic structure: troostite.
●Critical point temperature (approximate value) ℃, 3℃, r3℃, r℃, ℃.
●Normalizing specifications: temperature ℃, air cooling.
●Delivery status: Hot-rolled steel is delivered in a heat-treated or non-heat-treated state, and cold-drawn steel is delivered in a heat-treated state.
●Supply specifications:
Disc roundness: .~
Forged material: ~
Density
Density r.g/cubic centimeter, the steel can be cold rolled into steel plates , steel strips and wires to make springs. It can also be made into tools such as fitter's chisels and scribing needles. Steel can be used to make small springs with general cross-sectional dimensions of about ~, such as various small-sized flat and round springs, bottom springs, and spring springs.
Insulate at ℃3, then cool at a cooling rate of ℃/℃ to ℃ and then furnace cooling to obtain a complete spheroidized structure with uniform size.
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