Heat Treating Machining China Factory Alloy Structural Steel Application - China

Due to the suitable hardenability of alloy structural steel, after suitable metal heat treatment, the microstructure is uniform sorbite, bainite or extremely fine pearlite, so it has high tensile strength and yield ratio.

(generally around 0.85), high toughness and fatigue strength, and low toughness-brittleness transition temperature, can be used to manufacture machine parts with larger cross-sectional dimensions According to the steel grade and steel quality requirements, the smelting of alloy structural steel can be carried out by oxygen top-blown converter, open hearth, electric arc furnace; or by electroslag remelting and vacuum degassing.

The ingot can be cast by continuous casting or die casting.

The ingot should be slowly cooled or hot forged and rolled.

When the ingot is heated, the temperature should be uniform and there should be sufficient holding time to improve segregation defects and avoid uneven deformation during forging and rolling; the steel after forging and rolling is small in size, especially carburizing with a carbon content of about 0.2%.

Steel should be cooled rapidly at temperatures above 600°C to avoid aggravating the banded structure; for forgings with larger cross-sections, measures should be taken to eliminate internal stress and white spots.

Quenched and tempered steel should be quenched into martensite structure as much as possible, and then tempered into sorbite structure; in the carburizing process of carburized steel, the concentration gradient of the carburizing layer should not be too large, so as to avoid continuous network on the grain boundary of the carburizing layer.

Carbide; nitrided steel must first be heat treated to obtain the required properties, and then final finishing can be used for nitriding.

After nitriding treatment, no processing is required except that the brittle "white layer" is ground and removed.

Structural steel refers to steel that meets specific strength and formability grades.

Formability is expressed as elongation after break in tensile test.

Structural steel is generally used for load bearing and other applications where the strength of the steel is an important design criterion.

Structural steel can be subdivided into: alloy structural steel, carbon structural steel, low alloy structural steel, heat-resistant structural steel and so on.

alloy steel

In addition to iron and carbon, alloy steel is called alloy steel by adding other alloying elements.

An iron-carbon alloy formed by adding an appropriate amount of one or more alloying elements on the basis of ordinary carbon steel.

According to the difference of added elements and appropriate processing technology, special properties such as high strength, high toughness, wear resistance, corrosion resistance, low temperature resistance, high temperature resistance, and non-magnetic properties can be obtained.

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• Posted By: Dongguan Songshun Mould Steel Co., Ltd.

• Phone: 076985475596

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• Business Description: Established in 2009,Songshun Steel supplies a wide range of carbon, alloy and tool steel products, including high speed tool steel, cold work tool steel, hot work tool steel, plastic mould steel, engineering steel and machine structural steel etc.
  
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