CN105088080A - High-wear-resistance high manganese steel jaw plate for jaw crusher and preparation method thereof - Google Patents

Abstract

The invention discloses a high-wear-resistance high manganese steel jaw plate for a jaw crusher and a preparation method thereof. The high manganese steel jaw plate comprises the following chemical components in percentage by mass: 12.6-13.9 of Mn, 1.5-2.3 of Cr, 0.5-1.0 of Mo, 0.5-0.8 of Si, 1.0-1.5 of C, 0.3-0.5 of V, 0.4-0.7 of W, 0.2-0.4 of Ta, 0.15-0.25 of Al, 0.06-0.12 of Sc, 0.04-0.08 of Eu, S not more than 0.04, P not more than 0.06, and the balance of Fe. The high manganese steel jaw plate has the advantages of high hardness, good wear resistance, high strength, good toughness and strong impact resistance; the wear resistance is more than 2 times of that of traditional Mn13; and the high manganese steel jaw plate is durable, safe and reliable.

Description

A kind of high abrasion high mangaenese steel jaw for jaw crusher and preparation method thereof

Technical field

The present invention relates to cast iron materials technical field, be specifically related to a kind of high abrasion high mangaenese steel jaw for jaw crusher and preparation method thereof.

Background technology

Jaw crusher is metallurgy, mine, building materials, the industry widespread use such as to build the road crushing mechanism, being suitable for transporting for being broken into by the raw ore of exploitation, using and the material of grinding, its work is heavy, rigorous service condition, and stressing conditions is complicated.Jaw is its main vulnerable part, therefore has higher requirement to the wear resistance of jaw material and toughness.High mangaenese steel is traditional material of jaw plate of jaw crusher, and it has good toughness, also has good strain hardening ability.But its surface hardness is lower, and wear resistance is poor, during work, jaw wearing and tearing are very fast.Therefore, the wear resistance improving high mangaenese steel jaw is needed.

Summary of the invention

The object of the invention is to for the deficiencies in the prior art, a kind of high abrasion high mangaenese steel jaw for jaw crusher and preparation method thereof is provided.

For achieving the above object, the technical solution used in the present invention is as follows:

For a high abrasion high mangaenese steel jaw for jaw crusher, its each chemical composition and mass percent are: Mn12.6-13.9, Cr1.5-2.3, Mo0.5-1.0, Si0.5-0.8, C1.0-1.5, V0.3-0.5, W0.4-0.7, Ta0.2-0.4, Al0.15-0.25, Sc0.06-0.12, Eu0.04-0.08, S≤0.04, P≤0.06, surplus are Fe.

For a preparation method for the high abrasion high mangaenese steel jaw of jaw crusher, comprise the following steps:

(1) in medium-frequency induction furnace, melting is carried out, first add steel scrap and the pig iron is melting down, add ferromanganese, ferrochrome, molybdenum-iron, vanadium iron successively again, hot metal composition is adjusted after its all fusing, before coming out of the stove, successively add ferrotungsten and ferro tantalum in 4-8min, before coming out of the stove, in 3-6min, add fine aluminium carry out deoxidation, before coming out of the stove, carry out chemical composition analysis, can come out of the stove after qualified, molten iron tapping temperature controls at 1550-1580 DEG C;

(2) in bag, pour rare earth ferrosilicon alloy alterant and carry out rotten inoculation, alterant carries out the preheating of 250-350 DEG C before using, rotten inoculation temperature is 1510-1540 DEG C, then in bag, be sprinkled into appropriate perlite insulation gather the covering of slag insulating covering agent, and calm 6-9min, pour into a mould after skimming, teeming temperature controls at 1480-1500 DEG C;

(3) heat-treated by high mangaenese steel obtained above: be first heated to 580-630 DEG C, insulation 5-7h, reheats to 1080-1140 DEG C, insulation 3-5h, tempering 2-4h at 220-280 DEG C again after cold quenching, is then heated to 880-940 DEG C, insulation 2-3h, tempering 3-5h at 260-320 DEG C again after mist cold quenching, is finally heated to 720-780 DEG C, insulation 4-6h, reheat to 1040-1080 DEG C, insulation 3-5h, tempering 5-7h at 360-420 DEG C again after oil quenchinng, air cooling is to room temperature.

Beneficial effect of the present invention:

(1) present component is reasonable in design, by adding the alloying elements such as Cr, Mo, W, V, Ta and adjustment C, Mn content on traditional M13 basis, can to the further solution strengthening of austenitic matrix, strengthen the strain-hardening ability of matrix, simultaneously can in the base disperse embed hard the second strengthening phase, thus improve the wear resistance of high mangaenese steel;

(2) reasonable heat treatment process of the present invention, after three quenchings and corresponding temper, crystal grain is tiny, and homogeneous microstructure is fine and close, and has Hard Inclusion Dispersed precipitate, makes high mangaenese steel have high rigidity and wear resistance, has good impact resistance simultaneously;

(3) the high mangaenese steel jaw that the present invention obtains has that hardness is high, wear resistance good, and intensity is high, good toughness, and the advantage that shock resistance is strong, its wear resistance is more than 2 times of traditional Mn13, durable in use, safe and reliable.

Embodiment

For a high abrasion high mangaenese steel jaw for jaw crusher, its each chemical composition and mass percent are: Mn12.6-13.9, Cr1.5-2.3, Mo0.5-1.0, Si0.5-0.8, C1.0-1.5, V0.3-0.5, W0.4-0.7, Ta0.2-0.4, Al0.15-0.25, Sc0.06-0.12, Eu0.04-0.08, S≤0.04, P≤0.06, surplus are Fe.

For a preparation method for the high abrasion high mangaenese steel jaw of jaw crusher, comprise the following steps:

(1) in medium-frequency induction furnace, melting is carried out, first add steel scrap and the pig iron is melting down, add ferromanganese, ferrochrome, molybdenum-iron, vanadium iron successively again, hot metal composition is adjusted after its all fusing, before coming out of the stove, successively add ferrotungsten and ferro tantalum in 4-8min, before coming out of the stove, in 3-6min, add fine aluminium carry out deoxidation, before coming out of the stove, carry out chemical composition analysis, can come out of the stove after qualified, molten iron tapping temperature controls at 1550-1580 DEG C;

(2) in bag, pour rare earth ferrosilicon alloy alterant and carry out rotten inoculation, alterant carries out the preheating of 250-350 DEG C before using, rotten inoculation temperature is 1510-1540 DEG C, then in bag, be sprinkled into appropriate perlite insulation gather the covering of slag insulating covering agent, and calm 6-9min, pour into a mould after skimming, teeming temperature controls at 1480-1500 DEG C;

(3) heat-treated by high mangaenese steel obtained above: be first heated to 580-630 DEG C, insulation 5-7h, reheats to 1080-1140 DEG C, insulation 3-5h, tempering 2-4h at 220-280 DEG C again after cold quenching, is then heated to 880-940 DEG C, insulation 2-3h, tempering 3-5h at 260-320 DEG C again after mist cold quenching, is finally heated to 720-780 DEG C, insulation 4-6h, reheat to 1040-1080 DEG C, insulation 3-5h, tempering 5-7h at 360-420 DEG C again after oil quenchinng, air cooling is to room temperature.

Through inspection, commercialization studies and is divided into: Mn13.2%, Cr1.94%, Mo0.88%, Si0.67%, C1.17%, V0.44%, W0.58%, Ta0.36%, Al0.21%, Sc0.099%, Eu0.072%, S0.033%, P0.049%, surplus are Fe.Mechanical property is: bending strength: 898MPa, hardness: 67.8HRC, impelling strength: 18.1J/cm ².

Claims (2)

1. the high abrasion high mangaenese steel jaw for jaw crusher, it is characterized in that, its each chemical composition and mass percent are: Mn12.6-13.9, Cr1.5-2.3, Mo0.5-1.0, Si0.5-0.8, C1.0-1.5, V0.3-0.5, W0.4-0.7, Ta0.2-0.4, Al0.15-0.25, Sc0.06-0.12, Eu0.04-0.08, S≤0.04, P≤0.06, surplus are Fe.

2., as claimed in claim 1 for a preparation method for the high abrasion high mangaenese steel jaw of jaw crusher, it is characterized in that comprising the following steps:

(1) in medium-frequency induction furnace, melting is carried out, first add steel scrap and the pig iron is melting down, add ferromanganese, ferrochrome, molybdenum-iron, vanadium iron successively again, hot metal composition is adjusted after its all fusing, before coming out of the stove, successively add ferrotungsten and ferro tantalum in 4-8min, before coming out of the stove, in 3-6min, add fine aluminium carry out deoxidation, before coming out of the stove, carry out chemical composition analysis, can come out of the stove after qualified, molten iron tapping temperature controls at 1550-1580 DEG C;

(2) in bag, pour rare earth ferrosilicon alloy alterant and carry out rotten inoculation, alterant carries out the preheating of 250-350 DEG C before using, rotten inoculation temperature is 1510-1540 DEG C, then in bag, be sprinkled into appropriate perlite insulation gather the covering of slag insulating covering agent, and calm 6-9min, pour into a mould after skimming, teeming temperature controls at 1480-1500 DEG C;

(3) heat-treated by high mangaenese steel obtained above: be first heated to 580-630 DEG C, insulation 5-7h, reheats to 1080-1140 DEG C, insulation 3-5h, tempering 2-4h at 220-280 DEG C again after cold quenching, is then heated to 880-940 DEG C, insulation 2-3h, tempering 3-5h at 260-320 DEG C again after mist cold quenching, is finally heated to 720-780 DEG C, insulation 4-6h, reheat to 1040-1080 DEG C, insulation 3-5h, tempering 5-7h at 360-420 DEG C again after oil quenchinng, air cooling is to room temperature.