Standard: GB / T 1220-1992
2cr13 Overview
Scope:
Quenched state, high hardness, good corrosion resistance. For turbine blades. 2Cr13 density 7.75g/cm3 2Cr13 quenching hardness: general 2Cr13 the quenching temperature in the 980 ~ 1050 ℃, 980 ℃ heating oil quenching obtained when the hardness was significantly lower than 1050 ℃ heating oil quenched, 980 ℃ oil-quenched hardness of 45 ~ 50HRC , 1050 ℃ higher hardness after oil quenching 2HRC. 1050 ℃, but the organization has been quenched coarse grains, brittleness. Recommend the use of 1000 ℃ Hardening can get better and hardness.
Features:
2Cr13 martensitic stainless steel, welded to preheat. And Q235 welding austenitic stainless steel electrode without preheating, such as A302.A307 do.
Control of welding seam dilution rate, does not swing welding, using a smaller current.
2Cr13 welding consumables can be used:
1 atmospheric corrosion resistance election G202, G207, to be warm 150-300 degrees, 700-730 degrees tempering after welding;
(2) and heat-resistant organic acid selected: G211, to be warm 150-300 degrees;
3 good plasticity: A102, A107, A202, A207, A302, A307, welding preheat, preheat large thick.
Chemical composition:
Carbon C: 0.16 ~ 0.25
Si Si: ≤ 1.00
Manganese Mn: ≤ 1.00
Sulfur S: ≤ 0.030
Phosphorus P: ≤ 0.035
Chromium Cr: 12.00 ~ 14.00
Ni: to allow containing ≤ 0.60
Mechanical properties:
Tensile strength σb (MPa): quenching and tempering, ≥ 635
Conditions yield strength σ0.2 (MPa): quenching and tempering, ≥ 440
Elongation δ5 (%): quenching and tempering, ≥ 20
Reduction of area ψ (%): quenching and tempering, ≥ 50
Impact energy Akv (J): quenching and tempering, ≥ 63
Hardness: Annealed, ≤ 223HB; quenching and tempering, ≥ 192HB
● Heat treatment and microstructure specifications:
Heat treatment specifications: 1) annealing, 800 ~ 900 ℃ slow cooling or rapid cooling of about 750 ℃; 2) quenching, 920 ~ 980 ℃ oil cooling; 3) temper, 600 ~ 750 ℃ fast-cooling.
Microstructure: Organizing for the martensitic type.
● Delivery status: normal to heat treatment delivery, the treatment types specified in the contract; not indicated, according to the heat treatment state of delivery.
