Uns G43400 Steel The Influence Of Alloying Elements On Heat Treatment - China

Effect of alloying elements on heat treatment of UNS G43400 steel

1 - Effect on austenitization - Most alloying elements (except nickel and cobalt) slow down the austenitization process.

Therefore, UNS G43400 steel requires higher heating temperature and holding time than carbon steel during heat treatment.

- Carbides are not easy to decompose.

2 - Effect on austenite grain size - Most alloying elements have the effect of hindering the growth of austenite grains.

But manganese and boron are the opposite, which can promote the growth of austenite grains.

Therefore, except for manganese steel, UNS G43400 steel is not easy to overheat during heating.

This is conducive to obtaining fine martensite after quenching; it is also conducive to appropriately increasing the heating temperature so that more alloying elements are dissolved in austenite to increase hardenability and improve the mechanical properties of steel.

3 - Effect of alloying elements on austenite transformation - Except cobalt, all alloying elements shift the C curve to the right, reduce the critical cooling rate of steel, and improve the hardenability of steel.

Some alloying elements also change the shape of the C curve.

In addition, most alloying elements also lower the Ms point.

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We strictly control the quality of raw materials from the source.

We carefully select high-quality ores and alloy materials to ensure that each batch of steel has a stable and excellent chemical composition.

Through careful proportioning, we achieve a perfect balance of performance.

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