What material is 65Mn
65Mn full name 65Mn spring steel, for those stamping factory, spring factory customers, 65Mn is what material, 65Mn is what steel is no longer a problem. Because the most contact is 65Mn spring steel.
65Mn spring steel is commonly used spring steel, and the final heat treatment is quenched and tempered. 65Mn spring steel has high strength, large hardenability and small decarburization tendency, but it has overheating sensitivity, easy to appear quenching cracks and temper brittleness. In the annealed state, the machinability is good, the weldability is good, the cold deformation plasticity is low, and the strip can be processed by general bending.
The strength, hardness, elasticity and hardenability of the 65Mn spring plate are higher than that of No. 65 steel, with overheating sensitivity and tempering brittleness tendency, and water quenching has a tendency to crack. The machinability of annealed state 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. Spring ring. High wear resistance parts, such as grinding machine spindle, spring clamp. Precision machine tool screw. Cutting knife. Collar on spiral roller bearing. Railway rails, etc. Can be used for ordinary abrasive spring steel; Cold stamping die punch; Can be used for plastic mold, die-casting mold of the overall quenching rod for steel.
Heat treatment
65Mn low alloy round steel must have high elastic limit and high yield ratio to avoid permanent deformation of spring steel under high load. At the same time, it also requires good hardenability and low decarbonization sensitivity, so that the elastic limit is greatly reduced; And good surface quality, easy to process in hot and cold state and good heat treatment processability.
Heat treatment process of spring thermoforming spring steel formed in hot state. Most of the spring steel formed by this method is a combination of thermoforming and heat treatment, and most of the spiral spring steel is heat treated after thermoforming. The heat treatment method of this spring steel is quenching + moderate temperature tempering, and the structure is tempered trostenite after heat treatment. This kind of structure has high elastic limit and yield limit, and has certain toughness.
Adopt new concepts and methods, and innovate the development of stability control technology. Carefully analyze the formation mechanism of problems such as "rolling break and tail spin" that are most likely to occur in this "0.4 seconds" time, and carry out work from many aspects such as reducing roll damage and reducing tail deviation. After more than 3 years of software program development, tracking test, evaluation, analysis to determine the reasonable process parameters.
65Mn steel plate strength, hardness, elasticity and hardenability are higher than 65 steel, with overheating sensitivity and tempering brittleness tendency, water quenching has a tendency to crack. The machinability of annealed state 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. Spring ring. High wear resistance parts, such as grinding machine spindle, spring clamp, precision machine tool screw, cutter, spiral roller bearing sleeve ring, railway rail, etc.
