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　　Correct charging and charging of seamless pipe during heat treatment should ensure smooth air flow in the furnace, so that the seamless pipe can be heated uniformly and obtain uniform microstructure and properties. In general, there is no limit to the furnace temperature. It can be either a cold stove or a hot stove.

　　The heating temperature should be determined according to the type of steel and heat treatment, and the condition of heat treatment furnace and the way of charging and distributing should also be considered. After preliminary selection, it is better to test it. Various heat treatment methods.

　　In heat treatment, except martensitic steel, other types of seamless pipes can generally be heated as soon as possible. This can shorten the heat treatment cycle, improve the furnace productivity, but also reduce the oxidation of seamless pipe and the Russian Federation, but the heating rate is affected by the structure of the heat treatment furnace and heating capacity, there are certain limits.

　　The holding time varies with steel grades, steel tube specifications, type of heat treatment furnace, charging capacity, charging and distributing mode, and cold deformation.

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