CN107475619A - A kind of enhanced sorbite mining ledge abrasion resistant cast steel of ultra-hard particles and its manufacture method - Google Patents
A kind of enhanced sorbite mining ledge abrasion resistant cast steel of ultra-hard particles and its manufacture method Download PDFInfo
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- CN107475619A CN107475619A CN201710593568.2A CN201710593568A CN107475619A CN 107475619 A CN107475619 A CN 107475619A CN 201710593568 A CN201710593568 A CN 201710593568A CN 107475619 A CN107475619 A CN 107475619A
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- ledge
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- sorbite
- abrasion resistant
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
A kind of enhanced sorbite mining ledge abrasion resistant cast steel of ultra-hard particles and its manufacture method, belong to cast low alloy steel technical field.The wear-resisting ledge cast steel chemical composition percentage composition (wt.%) by weight is C：0.30‑0.50；Mn：0.90‑1.80；Si：0.25‑0.65；Mo：0.20‑0.60；Ti：0.30‑0.70；S≤0.030；P≤0.030；Surplus is Fe and inevitable impurity element.The manufacturing process of the ledge cast steel includes successively：Converter or electric furnace smelting, external refining, ledge molding, unpacking, heat treatment.According to mentioned component and technique, mining ledge abrasion resistant cast steel can obtain the TiC precipitated phases that volume fraction is 0.4 1.2%, and precipitate average grain diameter is about 3 μm；Wearability is up to 1.5 times of ZG30MnSiMo, and machinability and welding performance are excellent, disclosure satisfy that the requirement of mine flight conveyer intermediate channel.
Description
Technical field
The invention belongs to cast low alloy steel technical field, in particular, provides a kind of enhanced sorbite ore deposit of ultra-hard particles
It is a kind of enhanced Soxhlet of ultra-hard particles with superior abrasion resistance and processing characteristics with ledge abrasion resistant cast steel and its manufacture method
Body mining ledge abrasion resistant cast steel.
Background technology
At present, the material that uses of scraper conveyor for coal mines casting ledge is ZG30MnSiMo, the ledge of the cast
It disclosure satisfy that requirement under superior operating mode or in Medium or severe type drag conveyor equipment, but with coal mine fully-mechanized mining skill in recent years
The high speed development of art, the ledge of ZG30MnSiMo casts constantly manifest its deficiency when in use, such as：Ledge shovel board is not
It is wear-resisting, ledge upper surface is not wear-resisting etc..The main method that ZG30MnSiMo founding materialses improve its wearability is to improve quenching firmly
Degree, however, with the raising of hardness, the processability and toughness severe exacerbation of the cast steel, it is difficult to meet the middle pan of scraper conveyor
Manufacture requires.The wearability of casting ledge how is greatly improved on the premise of good workability and toughness is ensured, turns into coal machine
Manufacturing key technology difficulty urgently to be resolved hurrily.
The content of the invention
It is an object of the invention to provide a kind of enhanced sorbite mining ledge cast steel of ultra-hard particles and its manufacture method,
It is not wear-resisting to solve existing mining ledge cast steel ZG30MnSiMo, it is difficult to meet the difficulty that the middle pan of scraper conveyor manufacture requires
Topic, the present invention provide a kind of wearability up to a kind of 1.5 times of ZG30MnSiMo of the mining groove of the enhanced sorbite of ultra-hard particles
Help steel.The TiC precipitated phases of ultra-hard particles selection hardness HV >=3000, precipitated phase average-size is about 3 μm, volume fraction 0.4-
1.2%.These superhard TiC particles improve wearability principle：Prevent abrasive wear ditch dug with a plow by or crushing grain, blunt
Change abrasive particle wedge angle, significantly mitigate the wear weight loss of matrix.
The wear-resisting ledge cast steel chemical composition percentage composition (wt.%) by weight of the present invention is C：0.30-0.50；Mn：
0.90-1.80；Si：0.25-0.65；Mo：0.20-0.60；Ti：0.30-0.70；S≤0.030；P≤0.030；Surplus be Fe and
Inevitable impurity element.
The effect of each element of the present invention and proportioning are according to as follows：
Carbon：Improve steel quenching degree, there is strong solution strengthening effect, significantly improve martensite steel intensity and firmly
Degree；The carbon of proper content combines to form micron order TiC particles with titanium, can significantly improve wearability.Steel of the present invention controls carbon content
For 0.30-0.50%, carbon content is less than 0.20wt.%, it is difficult to forms the TiC particles of enough volume fractions, and the quenching degree of steel
All relatively low with hardness, carbon content is higher than 0.40wt.%, then the toughness plasticity of steel, processability and weldability deteriorate.
Silicon：One of deoxidant element in steel, while there is certain solution strengthening effect, but excessive silicon to the toughness of steel and
Welding performance is unfavorable.Summary considers that steel silicone content scope of the present invention is 0.25-0.65wt.%.
Manganese：The quenching degree of steel is significantly improved, while there is certain solution strengthening effect.But when manganese content is higher, its
Segregation tendency increase in strand, the increase of steel belt roof bolt fragility sensitiveness are unfavorable to welding performance in addition.Steel manganese content of the present invention
Scope is 0.90-1.80wt.%.
Titanium：As carbide, ultra-hard particles TiCs of the hardness HV more than 3000 is combined to form with carbon, significantly
Improve the wearability of steel.Present invention control Ti content 0.30-0.70wt.%, the TiC particle volume fractions formed are about 0.4-
1.2%, particle mean size is about 3 μm.Excessive TiC particles deteriorate the plasticity and toughness of material, and very few particle can not be carried effectively
The wearability of high material.
Using carbide Ti, content can effectively improve the wearability of material in 0.30-0.70% scopes, together
When material processability and excellent weldability, disclosure satisfy that relevant device manufacture requires.
Molybdenum：The quenching degree of steel is significantly improved, reduces temper brittleness, improves the resistance for delayed fracture of steel.Meanwhile molybdenum is solvable
Enter TiC and form (TiMo) C, improve the volume fraction of TiC particles.It is 0.20-0.60wt.% that the present invention, which controls molybdenum content scope,.
Phosphorus, sulphur seriously damage the toughness plasticity of steel as impurity element, and content controls in S≤0.030wt.% respectively, and P≤
0.030wt.%.
The manufacture method of mining ledge cast steel of the present invention, technique include successively：Converter or electric furnace smelting, external refining, groove
Side molding, unpack, heat treatment.
Mining ledge casts Heat-Treatment of Steel, including quenches and be tempered, and the technical parameter controlled in process is as follows.
Quenching temperature is 860~920 DEG C, and the heat time be 60-120 minutes, water quenching after mining ledge cast steel heats
To room temperature.Too high heating-up temperature makes AUSTENITE GRAIN COARSENING, reduces the toughness plasticity of mining ledge cast steel；Too low heating-up temperature
The quenching degree of mining ledge cast steel and the centre hardness of mining ledge are then substantially reduced, influences wearability.
Temperature is 520-620 DEG C, and soaking time 30-180 minutes, water cooling is to room temperature after insulation.
By above-mentioned technique, the matrix of the mining ledge cast steel is sorbite, while volume fraction is included in matrix
About 0.4-1.2% TiC precipitated phases, precipitate particle size are averagely about 3um (as depicted in figs. 1 and 2).The surrender of material
Intensity is more than 780MPa, and tensile strength is more than 860MPa, and elongation percentage is more than 8%, and room temperature impact work(is more than 20J, hardness HB280-
250, machinability and welding performance are excellent, disclosure satisfy that the requirement of mine flight conveyer intermediate channel.Material it is resistance to
More than 1.5 times up to ZG30MnSiMo of abrasive wear behavior.
The present invention breaches ZG30MnSiMo mining ledges cast steel merely by improving hardness come the technology of improve wearability
Thinking, under the conditions of hardness is basically unchanged, wearability is improved by introducing the superhard TiC particles of certain volume fraction micron order, is had
Effect solves the conspicuous contradiction of ZG30MnSiMo mining ledge cast steel wearabilities and processability and weldability, has wide application
Prospect.
Brief description of the drawings
Fig. 1 is the optics microstructure of the enhanced sorbite mining ledge abrasion resistant cast steel of ultra-hard particles of the present invention, white in figure
Colored particle is TiC.
Fig. 2 is the enhanced sorbite mining ledge abrasion resistant cast steel TiC particles size distributions of ultra-hard particles of the present invention.
Embodiment：
Embodiment 1：The chemical composition percentage composition by weight of the present invention is C：0.43；Si：0.45；Mn：1.24；Mo：
0.41；Ti：0.39；S：0.030；P：0.020；Surplus is Fe and inevitable impurity.Manufacturing process：Electric arc furnace smelting, LF
Refining, ledge molding, unpacks, heat treatment.Technology for Heating Processing：880 DEG C of austenitizing temperature, soaking time 1.5 hours, water quenching is extremely
Room temperature, then 560 DEG C are tempered 2 hours water coolings to room temperature.
Embodiment 2：The chemical composition percentage composition by weight of the present invention is C：0.38；Si：0.48；Mn：0.98；Mo：
0.35, Ti, 0.38, S：0.02；P：0.015；Surplus is Fe and inevitable impurity.Manufacturing process：Electric arc furnace smelting, LF essences
Refining, ledge molding, unpacks, heat treatment.Technology for Heating Processing：900 DEG C of austenitizing temperature, soaking time 1.5 hours, water quenching to room
Temperature, then 580 DEG C are tempered 2 hours water coolings to room temperature.
Embodiment 3：The chemical composition percentage composition by weight of the present invention is C：0.40；Si：0.36；Mn：1.15；Mo：
0.38；Ti：0.52；S：0.02；P：0.02；Surplus is Fe and inevitable impurity.Manufacturing process：Electric arc furnace smelting, LF essences
Refining, ledge molding, unpacks, heat treatment.Technology for Heating Processing：920 DEG C of austenitizing temperature, soaking time 1.5 hours, water quenching to room
Temperature, then 600 DEG C are tempered 2 hours water coolings to room temperature.
The embodiment of the present invention and ZG30MnSiMo mining ledges mechanical properties of cast steel and the wearability testing result such as institute of table 1
Show.
The embodiment of the present invention of table 1 and ZG30MnSiMo mining ledges mechanical properties of cast steel and wearability testing result
Claims (3)
- A kind of 1. enhanced sorbite mining ledge abrasion resistant cast steel of ultra-hard particles, it is characterised in that：Using converter or electric furnace smelting, Chemical composition percentage composition by weight (wt.%) is C：0.30-0.50；Mn：0.90-1.80；Si：0.25-0.65；Mo：0.20- 0.60；Ti：0.30-0.70；S≤0.030；P≤0.030；Surplus is Fe and inevitable impurity element.
- 2. a kind of manufacture method of the enhanced sorbite mining ledge abrasion resistant cast steel of ultra-hard particles described in claim 1, technique Include successively：Converter or electric furnace smelting, external refining, ledge molding, unpacking, heat treatment；It is characterized in that：Technology for Heating Processing is：Quenching temperature is 860~920 DEG C, and the heat time is 60-120 minutes, and mining ledge cast steel adds Water quenching is to room temperature after heat；Temperature is 520-620 DEG C, and soaking time 30-180 minutes, water cooling is to room temperature after insulation.
- 3. according to the method for claim 1, it is characterised in that：The matrix of the mining ledge cast steel is sorbite, together The TiC precipitated phases for being about 0.4-1.2% comprising volume fraction in Shi Jiti, precipitate particle size are averagely about 3um, are machined Performance and welding performance are excellent, disclosure satisfy that the requirement of mine flight conveyer intermediate channel.The abrasive wear resistance of material Can be up to more than 1.5 times of ZG30MnSiMo.
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Cited By (5)
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|---|---|---|---|---|
| CN109706399A (en) * | 2019-03-01 | 2019-05-03 | 攀钢集团攀枝花钢铁研究院有限公司 | High titanium abrasion-resistant stee and preparation method thereof |
| CN112981068A (en) * | 2021-02-02 | 2021-06-18 | 北京科技大学 | Method for improving toughness of microalloyed ledge steel casting by utilizing deformation induced precipitation |
| CN113462856A (en) * | 2021-07-02 | 2021-10-01 | 太原理工大学 | Heat treatment method for improving toughness of steel casting of middle trough ledge of scraper conveyor |
| CN114318160A (en) * | 2021-12-14 | 2022-04-12 | 中煤张家口煤矿机械有限责任公司 | Rare earth reinforced sorbite mine ledge wear-resistant cast steel and manufacturing method thereof |
| CN115233091A (en) * | 2022-06-23 | 2022-10-25 | 中煤张家口煤矿机械有限责任公司 | Novel microalloyed ledge cast steel and preparation method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109706399A (en) * | 2019-03-01 | 2019-05-03 | 攀钢集团攀枝花钢铁研究院有限公司 | High titanium abrasion-resistant stee and preparation method thereof |
| CN109706399B (en) * | 2019-03-01 | 2021-06-04 | 攀钢集团攀枝花钢铁研究院有限公司 | High-titanium wear-resistant steel and preparation method thereof |
| CN112981068A (en) * | 2021-02-02 | 2021-06-18 | 北京科技大学 | Method for improving toughness of microalloyed ledge steel casting by utilizing deformation induced precipitation |
| CN112981068B (en) * | 2021-02-02 | 2022-02-11 | 北京科技大学 | Method for improving toughness of microalloyed ledge steel casting by utilizing deformation induced precipitation |
| CN113462856A (en) * | 2021-07-02 | 2021-10-01 | 太原理工大学 | Heat treatment method for improving toughness of steel casting of middle trough ledge of scraper conveyor |
| CN114318160A (en) * | 2021-12-14 | 2022-04-12 | 中煤张家口煤矿机械有限责任公司 | Rare earth reinforced sorbite mine ledge wear-resistant cast steel and manufacturing method thereof |
| CN115233091A (en) * | 2022-06-23 | 2022-10-25 | 中煤张家口煤矿机械有限责任公司 | Novel microalloyed ledge cast steel and preparation method thereof |
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