1, The casues of straight seam steel quenching deformation is the uneven of various parts of the steel pipe, in the steel pipe to produce residual stress, resulting in deformation of steel pipe.
2, The size of raw materials is not ideal, such as wall thickness deviation is too large, or bending and oval greater, and so the deviation is too large wall thickness is the main factor affecting the quenching and deformation.
3, Steel pipe heating temperature is uneven, or quenching before the existence of deformation of the steel pipe.
4, The external cooling of the steel pipe is not uniform, such as steel pipe quenching fixed, the outside of the pipe in different directions of the cooling rate will be different.
5, In order to make the quenching within the spray evenly, should make the water in the steel pipe to achieve a certain flow rate, which is required by the water supply to ensure that, that is to have enough water within the water.
6, So in order to reduce the external cooling is not uniform, the current straight seam steel pipe manufacturers widely used steel pipe quenching method.
