How to choose materials and heat treatment for shaft parts ?

1 Material selection for shaft precision parts
(1) Generally, the shaft parts are made of 45 steel, the higher precision shaft can be used 40Cr, bearing steel GCr15, spring steel 65Mn, spheroidal graphite cast iron; for high speed and heavy load shaft, 20CrMnTi, 20Mn2B, 20Cr Isotonic carbon steel or 38CrMoAl nitrided steel.
(2) Common round bar stocks and forgings for general shaft parts blanks; castings are used for large shafts or complex shafts. After the blank is heated and forged, the internal fiber structure of the metal can be evenly distributed along the surface to obtain high tensile strength, bending strength and torsional strength.

2 Heat treatment of shaft parts

(1) Forging blanks must be arranged for normalizing or annealing before processing to refine the grain inside the steel, eliminate forging stress, reduce material hardness and improve cutting performance.

(2) The quenching and tempering is generally arranged after the roughing and before the semi-finishing to obtain good comprehensive mechanical properties.

(3) Surface quenching is generally arranged before finishing, which can correct local deformation caused by quenching.

(4) For shafts with high precision requirements, after local quenching or rough grinding, low temperature aging treatment is also required.

If your shaft parts require special handling, please mark them in the drawing or mark them in the body of the mail. Looking forward to your email