Precision seamless steel tube as a product must have a certain performance to meet the needs of using conditions.There are two ways to improve the performance of the steel, it is adjusting the chemical composition of steel, which uses alloying method;The other is the combination of heat treatment and heat treatment and plastic deformation.In the field of modern industrial technology, heat treatment in the aspect of improving the performance of the steel is still dominant.
There are many types of precision seamless steel pipe, and formulate the corresponding standards, the use of steel seeds range, sometimes users according to their own conditions attached to increase demand.In the standard, as one of the terms of delivery performance indicators must meet specified requirements.The performance of precision seamless steel tube mainly refers to the mechanical properties, physical properties, performance and process capability, etc.And the heat treatment by heat, heat preservation and cooling to obtain certain steel microstructure and properties of the corresponding, in order to meet the product standard and the user's requirements.
Precision seamless steel tube heat treatment embodied in the following aspects: the purpose of homogenization for precision seamless steel tube group By heat treatment can eliminate the original precision seamless steel tube production of uneven performance of organization, to achieve the required uniform organization and physical properties;To eliminate the defects in production Such as cold drawn precision seamless steel tube processing production after hardening of 1.3 1.6 times higher strength, elongation rate was reduced by 30% - 35%, corresponding to cold working can pull off, so you need to intermediate annealing to eliminate internal stress;When hot rolled seamless precision seamless steel tube in the residual stress is bigger, affect the corrosion resistance, the fight against performance also need to eliminate the residual stress in heat treatment.
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