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Heat treatment of 35CrMnSi steel
35CrMnSi alloy steel

35CrMnSi heat treatment specification:

1) quenching: 950℃ for the first time and 890℃ for the second time, with oil cooling; Tempering at 230℃, air cooling and oil cooling; 2) Isothermal quenching at 280 ~ 310℃ and 880℃.

Introduction to 35CrMnSi:

35CrMnSi steel is a kind of low alloy ultra-high strength steel. After heat treatment, it has good comprehensive mechanical properties, high strength, sufficient toughness, hardenability, weldability and machinability, but its corrosion resistance and oxidation resistance are low. Use after low temperature tempering or isothermal quenching.

35CrMnSi steel is a kind of material with good hardenability. After proper heat treatment, better comprehensive mechanical properties such as strength, hardness, toughness and fatigue strength can be obtained, which can adapt to the complex working conditions of coal mine production.

Chemical constituents of 35CrMnSi:

C: 0.32 ~ 0.39

Silicon silicon: 1. 10 ~ 1.40

Manganese Mn: 0.80 ~ 1. 10

Sulfur S: allowable residual content ≤0.025.

Phosphorus P: allowable residual content ≤0.025.

Chromium Cr:1.10 ~1.40

Nickel Ni: allowable residual content ≤0.030.

Copper and copper: allowable residue ≤0.025.

Mechanical properties of 35CrMnSi:

Tensile strength σ b (MPa): ≥1620 (165)

Yield strength σ s (MPa): ≥1275 (130)

Elongation δ 5 (%): ≥ 9

Area shrinkage ψ (%): ≥ 40

Impact work akv (j): ≥ 3 1

Impact toughness value α kV (j/cm2): ≥ 39 (4)

Sample size: sample

35CrMnSi delivery status:

The goods shall be delivered in heat treatment (normalizing, annealing or high temperature tempering) or in non-heat treatment state, and the delivery state shall be indicated in the contract.

35CrMnSi uses:

Used for welding and riveting structural parts working under vibration load, such as high-pressure fan blades, valve plates, high-speed and high-load shafts, gears, sprockets, clutches, bushings, bolts, nuts, etc.