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Basics of high manganese steel
2024-05-21
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Manganese steel is mainly used for the need to withstand impact, extrusion, material abrasion and other harsh working conditions, the form of damage to wear and tear consumption-based, partial fracture, deformation. Wear is categorized into three kinds: frictional wear between the surfaces of metal components in contact with each other and movement; abrasive wear caused by other metallic or non-metallic materials striking the metal surface and erosive wear caused by the contact of flowing gases or liquids with the metal. Wear-resistant steel wear resistance depends on the material itself, while wear-resistant steel in different working conditions show different wear resistance, the material itself and working conditions both to determine its wear resistance.
Casting wear-resistant steel and wear-resistant steel to austenitic manganese steel is the main, under certain conditions by the appropriate heat treatment of low alloy steel also has a very good effect, graphite steel is used for lubrication friction conditions.
Wear-resistant high manganese steel is especially suitable for impact abrasive wear and high stress grinding abrasive wear conditions, commonly used in the manufacture of ball mill liners, hammer crusher hammerheads, jaw crusher jaw plate, cone crusher mortar wall, crushing wall, excavator bucket teeth, bucket wall, railroad turnouts, tractors and tanks, track plates and other anti-impact, wear-resistant castings. High manganese steel is also used in bulletproof steel plate, safe steel plate and so on.
High manganese steel is a typical wear-resistant steel, cast state organization for austenite plus carbide. After water quenching treatment at about 1000°C, the organization changes to a single austenite or austenite plus a small amount of carbide, and the toughness is improved, so it is called water toughness treatment.
High manganese steel is characterized by strong impact, extrusion conditions, the surface layer of the rapid occurrence of work hardening phenomenon, so that its heart still maintains austenite good toughness and plasticity at the same time the hardened layer has good wear resistance. This is not as good as other materials. But the wear resistance of high manganese steel is only enough to form work hardening conditions to show its superiority, other cases are very poor.
The standard type of Mn13 high manganese steel, also known as Hadfield steel, was invented by the Englishman Hadfield in 1882. Its related national and international standards are as follows. Chinas national standard for high manganese steel castings (GB/T5680-1998) grades are: ZGMn13-1, ZGMn13-2, ZGMn13-3, ZGMn13-4, ZGMn13-5; the U.S. ASTM standard for austenitic manganese steel castings (ASTMMA128/A128M-1993) steel number: ASTM-A (UNS-), ASTM-A (J9110 9), ASTM-A (UNS-), ASTM-A (UNS), ASTM-A (UNS-), ASTM-A (UNS-). J9110 9), ASTM-B-1 (UNS-J91119), ASTM-B-2 (UNS-J91129), ASTM-B-3 (UNS-J9113 9), ASTM-B-4 (UNS-J91149), ASTM-C (UNS-J91309), ASTM-D (UNS-J91459), ASTM-E-1 (UNS-J91249), ASTM-E-2 (UNS-J91339), ASTM-F (Note: If the user has no other requirements, the general supply of steel A castings); Japans national standard for high manganese steel castings [JISG5131 (1991)] grades are: SCMnH1, SCMnH2, SCMnH3, SCMnH11, SCMnH21; Russian casting high manganese steel standard ΓOCT977-1988 steel grades are: 110Γ13π, 110Γ13X2BPπ, 110Γ13ΦTπ, 130Γ14XMΦAπ, 120Γ10Φπ; ISO International Standard for Austenitic Manganese Steel Castings [ISO13521:1999(E)] grades are: GX120MnMo7-1, GX110MnMo13-1, GX100Mn13, GX120Mn13, GX120MnCr13-2, GX120MnNi13-3, GX120Mn17, GX90MnMo14, GX120MnCr17-2.
The typical Mn17 wear-resistant high manganese steel is based on Mn13 steel to increase the amount of manganese, improve the stability of the austenite, to prevent carbide precipitation, which can improve the strength and plasticity of the steel, improve the steels work-hardening ability and wear resistance. For example, the life of ZGMn18 railroad forks used in the north is 20%~25% higher than that of ZGMn13.
High manganese steel should be avoided as much as possible for casting due to work hardening phenomenon. The holes and grooves on the castings are cast out as far as possible. But the processing of high manganese steel is not completely impossible. Tool dressing a feed processing can be carried out, unavoidable processing should be designed in the casting process to amplify the amount of processing, in order to process the amount of feed to avoid the work hardening layer.
High manganese steel reheating, in 250 ~ 800 ° C between the existence of carbide precipitation of brittle temperature range, and cast high manganese steel and the existence of reticulated carbide and casting stress, therefore, the welding performance is very poor.
High manganese steel castings, should be in the water toughness treatment after cutting risers or defects welding, welding should be quickly cooled. In order to eliminate or minimize the heat-affected zone, the application of small current, not continuous welding, or welding side water cooling. Welding rod using high manganese steel welding rod or austenitic stainless steel welding rod. If there is a work hardening layer, should be removed before welding.
High manganese steel casting crusher, also known as pulverizer, is a kind of crushing machinery, mostly used for metallurgical mineral crushing and grinding. It can be used with washing equipment and mining equipment to form a complete set of mining machinery production line for the integrated processing and production of ores. Crushers have: jaw crusher, jaw crusher, hammer crusher, cone crusher, double roll crusher, roll crusher, impact crusher, plastic crusher. As a typical anti-wear steel, high manganese steel is a very good material for crushing parts in crusher.
High manganese steel castings are mostly used in sand molding process program, sand casting due to mature technology, high production efficiency and widely promoted. There is also the use of special casting. Special casting refers to the casting materials, modeling methods, liquid metal filling form and metal in the type of solidification conditions and other aspects of sand casting casting method with significant differences. Special casting, including: investment casting, metal casting, pressure casting, low-pressure casting, counterpressure casting, extrusion casting, centrifugal casting, disappearance casting, gypsum casting, ceramic precision casting, continuous casting, vacuum casting, fine crystal casting, electromagnetic casting and so on.
Casting wear-resistant steel and wear-resistant steel to austenitic manganese steel is the main, under certain conditions by the appropriate heat treatment of low alloy steel also has a very good effect, graphite steel is used for lubrication friction conditions.
Wear-resistant high manganese steel is especially suitable for impact abrasive wear and high stress grinding abrasive wear conditions, commonly used in the manufacture of ball mill liners, hammer crusher hammerheads, jaw crusher jaw plate, cone crusher mortar wall, crushing wall, excavator bucket teeth, bucket wall, railroad turnouts, tractors and tanks, track plates and other anti-impact, wear-resistant castings. High manganese steel is also used in bulletproof steel plate, safe steel plate and so on.
High manganese steel is a typical wear-resistant steel, cast state organization for austenite plus carbide. After water quenching treatment at about 1000°C, the organization changes to a single austenite or austenite plus a small amount of carbide, and the toughness is improved, so it is called water toughness treatment.
High manganese steel is characterized by strong impact, extrusion conditions, the surface layer of the rapid occurrence of work hardening phenomenon, so that its heart still maintains austenite good toughness and plasticity at the same time the hardened layer has good wear resistance. This is not as good as other materials. But the wear resistance of high manganese steel is only enough to form work hardening conditions to show its superiority, other cases are very poor.
The standard type of Mn13 high manganese steel, also known as Hadfield steel, was invented by the Englishman Hadfield in 1882. Its related national and international standards are as follows. Chinas national standard for high manganese steel castings (GB/T5680-1998) grades are: ZGMn13-1, ZGMn13-2, ZGMn13-3, ZGMn13-4, ZGMn13-5; the U.S. ASTM standard for austenitic manganese steel castings (ASTMMA128/A128M-1993) steel number: ASTM-A (UNS-), ASTM-A (J9110 9), ASTM-A (UNS-), ASTM-A (UNS), ASTM-A (UNS-), ASTM-A (UNS-). J9110 9), ASTM-B-1 (UNS-J91119), ASTM-B-2 (UNS-J91129), ASTM-B-3 (UNS-J9113 9), ASTM-B-4 (UNS-J91149), ASTM-C (UNS-J91309), ASTM-D (UNS-J91459), ASTM-E-1 (UNS-J91249), ASTM-E-2 (UNS-J91339), ASTM-F (Note: If the user has no other requirements, the general supply of steel A castings); Japans national standard for high manganese steel castings [JISG5131 (1991)] grades are: SCMnH1, SCMnH2, SCMnH3, SCMnH11, SCMnH21; Russian casting high manganese steel standard ΓOCT977-1988 steel grades are: 110Γ13π, 110Γ13X2BPπ, 110Γ13ΦTπ, 130Γ14XMΦAπ, 120Γ10Φπ; ISO International Standard for Austenitic Manganese Steel Castings [ISO13521:1999(E)] grades are: GX120MnMo7-1, GX110MnMo13-1, GX100Mn13, GX120Mn13, GX120MnCr13-2, GX120MnNi13-3, GX120Mn17, GX90MnMo14, GX120MnCr17-2.
The typical Mn17 wear-resistant high manganese steel is based on Mn13 steel to increase the amount of manganese, improve the stability of the austenite, to prevent carbide precipitation, which can improve the strength and plasticity of the steel, improve the steels work-hardening ability and wear resistance. For example, the life of ZGMn18 railroad forks used in the north is 20%~25% higher than that of ZGMn13.
High manganese steel should be avoided as much as possible for casting due to work hardening phenomenon. The holes and grooves on the castings are cast out as far as possible. But the processing of high manganese steel is not completely impossible. Tool dressing a feed processing can be carried out, unavoidable processing should be designed in the casting process to amplify the amount of processing, in order to process the amount of feed to avoid the work hardening layer.
High manganese steel reheating, in 250 ~ 800 ° C between the existence of carbide precipitation of brittle temperature range, and cast high manganese steel and the existence of reticulated carbide and casting stress, therefore, the welding performance is very poor.
High manganese steel castings, should be in the water toughness treatment after cutting risers or defects welding, welding should be quickly cooled. In order to eliminate or minimize the heat-affected zone, the application of small current, not continuous welding, or welding side water cooling. Welding rod using high manganese steel welding rod or austenitic stainless steel welding rod. If there is a work hardening layer, should be removed before welding.
High manganese steel casting crusher, also known as pulverizer, is a kind of crushing machinery, mostly used for metallurgical mineral crushing and grinding. It can be used with washing equipment and mining equipment to form a complete set of mining machinery production line for the integrated processing and production of ores. Crushers have: jaw crusher, jaw crusher, hammer crusher, cone crusher, double roll crusher, roll crusher, impact crusher, plastic crusher. As a typical anti-wear steel, high manganese steel is a very good material for crushing parts in crusher.
High manganese steel castings are mostly used in sand molding process program, sand casting due to mature technology, high production efficiency and widely promoted. There is also the use of special casting. Special casting refers to the casting materials, modeling methods, liquid metal filling form and metal in the type of solidification conditions and other aspects of sand casting casting method with significant differences. Special casting, including: investment casting, metal casting, pressure casting, low-pressure casting, counterpressure casting, extrusion casting, centrifugal casting, disappearance casting, gypsum casting, ceramic precision casting, continuous casting, vacuum casting, fine crystal casting, electromagnetic casting and so on.
