Mn13 high-manganese steel welding technology
A welding process, high manganese steel technology, applied in the field of steel welding, can solve the problems of strict welding process requirements, expensive welding materials, low welding efficiency, etc., to achieve the effect of ensuring joint performance, lower cost, and improving welding efficiency
Inactive Publication Date: 2020-01-03
BAOSHAN IRON & STEEL CO LTD
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Problems solved by technology
[0007] The purpose of the present invention is to propose a welding process for Mn13 high manganese steel, to obtain good weld joint performance, and to solve the problems of expensive welding materials, strict welding process requirements and low welding efficiency in the past high manganese steel welding
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[0036] Take butt welding of 20mm thick Mn13 steel plate as an example, process 60° V-shaped welding groove, the schematic diagram of the joint is as follows figure 1 shown.
[0037] Use φ4.0mm stainless steel electrodes for manual arc welding of the transition layer, and water-cool and hammer the welding area in time. Use 60kg low-alloy steel welding wire with a specification of φ1.2mm for argon-rich gas shielded welding of filled welds, using 80% Ar+20% CO 2 As a shielding gas, the gas flow rate is 20L / min, and a walking trolley is used to realize automatic welding. The specific welding parameters are shown in Table 1.
[0038] Table 1 welding process parameters
[0039]
[0040] Macrophotographs of welded joint sections (see figure 2 ), indicating that the joints are well fused, and there are no welding defects such as cracks, pores, and slag inclusions.
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Abstract
The invention discloses an Mn13 high-manganese steel welding technology, which comprises the following steps that: 1) processing a reasonable welding groove on a butt joint plate material; 2) carryingout transition layer welding, adopting a direct current reverse polarity, immediately carrying out water cooling and hammering after a welding line of which the length is 50-100mm is welded for eachtime, measuring the temperature of a position, which is 10-20mm far away from the groove, of a welded material, cooling to be below 50DEG C, and continuously welding after a surface is cleaned, wherein a welding way is SMAW (Shielded Metal Arc Welding), welding current is 110-130A, electric arc voltage is 35-45V, a welding speed is 150-250mm / min, a cooling way is air cooling, the temperature of alayer channel is less than or equal to 50DEG C, and the thickness of the transition layer is 4-6mm; and 3) welding a filling welding line, adopting argon-rich gas shielded welding for welding, carrying out air cooling to be below 150DEG C after one pass is finished, and carrying out next-pass welding, wherein low-alloy welding wires are adopted as a welding material, welding current is 220-260A, electric arc voltage is 28-31V, a welding speed is 400-450mm / min, a cooling way is air cooling, and the temperature of a layer channel is less than or equal to 150DEG C.
Description
technical field [0001] The invention relates to steel material welding technology, in particular to a welding technology of Mn13 high manganese steel. Background technique [0002] Mn13 steel is a wear-resistant steel invented by R.A. Hadfield in 1882. The carbon content of the steel is relatively high, generally 0.90% to 1.30%, Mn: 11.0 to 14.0%, Si: 0.10 to 0.50%, S, P≤0.35%. The steel has an austenitic structure. When it is subjected to impact load, the metal surface undergoes plastic deformation. With the increase of dislocation density, the results show that there is obvious work hardening phenomenon in the deformed layer, and the surface hardness is greatly increased. Mn13 steel itself has poor weldability. The main problem of Mn13 steel welding is the precipitation of carbides in the heat-affected zone, which causes hot cracks and leads to the destruction of welded joints. [0003] Chinese Patent Publication No. CN1439481A discloses "High Manganese Steel Welding El...
Claims
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IPC IPC(8): B23K35/30B23K9/235B23K9/00B23K9/16B23K9/095
CPCB23K9/00B23K9/095B23K9/16B23K9/235B23K35/30B23K35/3053B23K35/3086
Inventor 屈朝霞夏立乾王小杰朱双春
Owner BAOSHAN IRON & STEEL CO LTD
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