65Mn Spring Steel

65MN

Quenching temperature :830℃+20℃

Tempering temperature :540℃±50℃(for special needs,±30℃)

65Mn spring steel, manganese to improve the hardenability, φ12mm steel oil can be quenched through, the surface decarburization tendency is smaller than silicon steel, after heat treatment of the comprehensive mechanical properties of excellent

In carbon steel, but with overheating sensitivity and tempering brittleness. Used as a small size of various flat, round springs, cushion springs, spring clockwork, can also make spring rings, valve springs, off

Reeds, brake springs and coil springs of cold drawn steel wire, etc

● Characteristics and scope of application

65mn strength. Hardness, elasticity and hardenability are higher than No. 65 steel, with overheating sensitivity and tempering brittleness tendency, water quenching has a tendency to crack. Cut in annealed form

The cutting property is reasonable, the cold deformation plasticity is low, and the weldability is poor. Moderately loaded plate springs, coil springs with a diameter of 7-20mm and spring washers and spring rings. High wear resistance

Parts, such as grinder spindles. Spring clamp. Precision machine tool screw. Cutting knives. Sleeve rings on spiral roller bearings. Railway rails, etc

● Mechanical properties:

Tensile strength ob(MPa):825~925

Elongation 10 (%):14~22.5

Section shrinkage (%): not more than 10

Hardness: hot rolling,≤302HB; Hot rolling + heat treatment,≤321HB

Production Process

1. Raw material selection: The key to the production of 65Mn steel is to select high-quality raw materials. Manufacturers need to carefully select high-quality iron ore, scrap steel and other raw materials for production. Through the evaluation and selection of raw materials, to ensure the quality of steel.

2. Smelting: the selected raw materials will be melted at high temperature, and the decarbonization, desulfurization and other impurity removal work will be carried out rapidly under the action of slag. In the production process, strictly control the furnace temperature and ensure the smelting time to ensure the stability of the chemical composition and physical properties of steel.

3. Forging: The melt qualified molten steel performance correction and shape trimming. In different links, it is necessary to strictly control the processing parameters to ensure and even further improve the strength and toughness of the steel.

4. Heat treatment: Through high temperature annealing or normalizing heat treatment process, effectively improve the strength, toughness, hardness and other performance indicators of 65Mn steel, and adjust the organizational structure of steel to ensure the application needs of material industry production.

5. Trimming cutting, inspection and packaging: cutting, trimming and surface treatment of favorite things to meet the specifications and surface quality standards required by the factory. Through the strict quality inspection of each batch of products, to ensure its good quality. Finally, before leaving the factory, the product is packaged to ensure the safe transportation of the container road and water transportation of the product.

Applications