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How to improve the inner surface quality of DIN 1630 ST37.4 seamless steel pipe

2020-12-28 15:41:50

In order to avoid the scarring defect in the hot continuous rolling DIN 1630 ST37.4 seamless steel pipe, first learn to use the deoxidizer, the oxide must be in a molten state when the core rod is pre-pierced. Its DIN 1630 ST37.4 seamless steel pipe strength and other strict requirements. The particle size of the deoxidizer powder is generally required to be about 16 mesh.

The content of sodium stearate in the deoxidizer must be more than 12%, so that it can burn fully in the capillary lumen. According to the inner surface area of the capillary to determine the amount of deoxidizer sprayed, generally 1.5-2.0g/dm2, the deoxidizer dose of DIN 1630 ST37.4 seamless steel pipe with different diameters and lengths is different.

Secondly, reasonably set the injection process parameters of DIN 1630 ST37.4 seamless steel pipe. The injection pressure should match the diameter and length of the capillary tube to ensure strong purging and sufficient combustion, and no incompletely combusted deoxidizer can be blown away from the capillary tube by the airflow. The purge time should be adjusted according to the length of the DIN 1630 ST37.4 seamless steel pipe, with no suspended metal oxides in the capillary being blown out as the standard.

In addition, the mandrel must be lubricated. In order to increase the temperature of the mandrel, only one cooling water cooling method can be adopted. The temperature of the mandrel DIN 1630 ST37.4 seamless steel pipe needs to be strictly controlled during the production process.

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