Common seamless steel pipe heat treatment process, use and function

Heat treatment is a seamless steel pipe thermal processing technology that heats, heats, and cools seamless steel pipe in a certain medium, and controls its performance by changing the surface or internal crystalline structure of the material. In addition to annealing and tempering, there are three types of normal heat treatment processes:

1. Normalization

Normalization processing, also called normalization processing. The normalizing treatment in the heat treatment process of seamless steel pipes is actually normalizing treatment. Usually in the hot working process, the structure of the seamless steel pipe material changes, and the performance also changes accordingly. In order to restore the structure to normal, normalizing treatment is often used, so normalizing treatment is also called normalization treatment.

Normalization treatment can be used as a final heat treatment, or as a pre-heat treatment, and can also improve processing performance. In general, carbon steel normalizing treatment is a heat treatment process that heats a carbon steel workpiece that has been heated to a high temperature and completes austenitization, and is directly cooled in the air to obtain a fine pearlite structure. The structure of normalizing heat treatment has better comprehensive mechanical properties.

2. Quenching

Quenching is to heat the seamless steel pipe to a temperature above the austenitizing temperature, namely the critical temperature AC3 (hypoeutectoid steel) or AC1 (hypereutectoid steel), and hold it for a period of time to make it fully or partially austenitized Then, the heat treatment process of martensite (or bainite) transformation is performed by cooling faster than the critical cooling rate to below Ms (or near isothermal temperature).

In addition, the solid solution treatment of aluminum alloy, copper alloy, titanium alloy, tempered glass and other materials or the heat treatment process with rapid cooling process is usually called quenching.

3. Tempering

Quenching and tempering is a double heat treatment of quenching and high temperature tempering. Quenching and tempering can adjust the performance and material of seamless steel pipe to a large extent, and its strength, plasticity and toughness are good, and it has good comprehensive mechanical properties.

During quenching and tempering, the quenched part of the seamless steel pipe obtains a microstructure dominated by fine needle-shaped quenched martensite. However, high-temperature tempering refers to tempering between 500-650?, and tempered sorbite is obtained after high-temperature tempering. This is a mixture of ferrite and granular carbide.

Nansteel Manufacturing Co.,Ltd, today an ISO - 9001:2008, certified Company. are a prominent Manufacturer, Stockist and Exporter of carbon steel pipe, stainless steel pipe, structural section, fittings and OCTG in various materials including Stainless Steel, Carbon Steel, Alloy Steel. in standard size and as per our customers’ requirements and drawings. Products from Nansteel are used widely in Nuclear Power Plants, Thermal Power Stations, Atomic Power Plants, Oil & Gas, Petrochemical, Fertilizers, and Chemicals & Pharmaceuticals.Together with the know-how which technical power and the many years and spontaneity service, we supply the product of good quality with economies of scale to the customer. Moreover, it had become the company compared is equipping the best role of competitive power improvement with the customer. We grew as the novelty one enterprise grows the partner relationship which goes out it pursues to be strong, continuity. Nansteel is a growth-oriented company, providing exceptional quality and service with competitive pricing on all of our products. We take pride in our employees, products and service, all of which have contributed to years of growth. This philosophy has earned us a solid reputation for excellence within our industry.

Tips: ASTM A106 Seamless Pipe is commonly used in the construction of oil and gas refineries, power plants, petrochemical plants, boilers, and ships where the piping must transport fluids and gases that exhibit higher temperatures and pressure levels.

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Marketing Director of Nansteel Manufacturing Co.,Ltd,which manufacture and supply differenet steel products, like seamless steel pipe, carbon steel pipe, stainless steel pipe, casing etc.