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MAR 28 2017

Characteristic of high manganese steel

Casting

High manganese steel is the most important features in the strong impact, extrusion conditions, surface hardening phenomenon occurs rapidly, in the heart of remained austenite with good toughness and plasticity of the hardened layer has a good wear resistance. This is better than other materials. But the high manganese steel wear resistance only have enough to form a work-hardened condition to demonstrate its superiority, other cases is very poor.

High manganese steel due to work hardening phenomenon, should try to avoid casting processing. Casting on the hole, groove cast out as much as possible. But for high manganese steel processing is not entirely impossible. Tool dressing a feed finished can be carried out, the inevitable process in casting process design when amplifying processing volume, so that the processing of the feed from hardening layer.

High manganese steel reheating, in 250 – 800 ° C between the precipitation of carbides brittle temperature range, and cast high manganese steels and meshy carbides and the casting stress, therefore, the welding performance is poor.

High manganese steel castings, should be in of water toughening treatment after cutting riser or defect welding, welding after rapid cooling. In order to eliminate or minimize heat affected zone, the application of small current, discontinuous welding, or side solder side water cooling. Electrode for high manganese steel or austenitic stainless steel electrode. If the existence of hardening layer, should be removed before welding.