CN105420617A - High-hardness abradable liner plate special for mines and manufacturing method thereof - Google Patents
High-hardness abradable liner plate special for mines and manufacturing method thereof Download PDFInfo
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- CN105420617A CN105420617A CN201510726726.8A CN201510726726A CN105420617A CN 105420617 A CN105420617 A CN 105420617A CN 201510726726 A CN201510726726 A CN 201510726726A CN 105420617 A CN105420617 A CN 105420617A
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/36—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.7% by weight of carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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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
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
-
- 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
-
- 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
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium with copper
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
Abstract
The invention provides a high-hardness abradable liner plate special for mines and a manufacturing method thereof and relates to the technical field of abradable liner plates. Chemical constituents in the liner plate include, by weight, 2.15-2.80% of C, 11.21-14.56% of Cr, 0.50-0.82% of Si, 0.52-0.76% of Mn, 0.89-1.05% of Mo, 0.90-1.25% of Cu, 0.06-0.12% of Ti, 0.003-0.008% of B, 0.15-0.23% of Re, 0-0.03% of S, 0-0.03% of P and the balance Fe. The chromium content and the Cr/C ratio in the materials of the liner plate are controlled, so that the hardness of the liner plate is improved; by means of compounding use of noble metal elements such as Mo, Cu and Ti, the austenite stability is improved, grains are refined, and high-temperature stability and red hardness of carbides are improved. Therefore, the hardness of the liner plate is further improved, and the abrasion resistance is correspondingly improved.
Description
Technical field
The present invention relates to abrasion-proof backing block technical field, be specifically related to the special high hardness wear-resisting liner plate in a kind of mine and manufacture method thereof.
Background technology
The industries such as metallurgical mine, cement building material, electric power, chemical fertilizer, coal, chemical industry widely use crusher in crushing material, and wherein liner plate is the main expendable part in crusher, and its quality had both affected crusher production operational availability, also affect material and are broken into this.Conventional lining board of crusher material mainly contains two large classes, one class is Hadfield Steel, its toughness is high, and original hardness is low, and in use procedure, the work hardening of main dependence austenite improves its hardness, after abundant work hardening, its hardness brings up to HB400-500 by original HB200, and under high impact loads condition, use obtains good result of use, but uses under medium and small shock load condition, austenite can not fully work hardening, and it wears no resistance.Another kind of is cast alloy iron, and its hardness is high, and toughness is low, good without result of use under shock load, but is having use under shock load condition easily to occur cracked phenomenon.
At present, many cast iron materials on the market all can be selected in single chrome alloy cast iron, to add the precious metal elements such as molybdenum, tungsten, niobium, nickel, to improve hardening capacity and the hardenability of material.CN101012526A discloses a kind of rare earth multicomponent micro-alloying high-chromium cast iron, the chemical composition of this cast iron contains by weight, 1.0 ~ 3.5 parts, carbon, chromium 8.0 ~ 26.0 parts, 0.5 ~ 4.5 part, nickel, molybdenum 0.15 ~ 2.0 part, copper 0.5 ~ 2.0 part, 0.05 ~ 2.0 part, aluminium, vanadium 0.03 ~ 0.3 part, rare earth 0.005 ~ 0.20 part, silicon≤0.5 part, manganese≤0.7 part, sulphur≤0.05 part, phosphorus≤0.05 part, surplus is iron, the chemical composition of this cast iron is by weight also containing titanium 0.03 ~ 0.30 part, also containing niobium 0.03 ~ 0.30 part, also containing 0.80 ~ 3.70 part, tungsten.Adopt the cast iron of this chemical composition to carry out follow-up thermal treatment, maximum hardness can reach 59-64HRC, but it cannot meet the requirement of high rigidity and high impact toughness simultaneously.
Summary of the invention
(1) technical problem solved
For the deficiency that above-mentioned prior art exists, the invention provides the special high hardness wear-resisting liner plate in a kind of mine and manufacture method thereof, this liner plate has high rigidity and high impact toughness feature, by controlling chromium constituent content, Cr/C ratio in material, improves the hardness of liner plate; The compound use of Mo, Cu, Ti precious metal element, also enhances austenitic stability, crystal grain thinning, improves high-temperature stability and the red hardness of carbide.
(2) technical scheme
For realizing above object, the present invention is achieved by the following technical programs:
A kind of special high hardness wear-resisting liner plate in mine and manufacture method thereof, in this liner plate, the weight percent of each chemical composition is: C:2.15 ~ 2.80%, Cr:11.21 ~ 14.56%, Si:0.50 ~ 0.82%, Mn:0.52 ~ 0.76%, Mo:0.89 ~ 1.05%, Cu:0.90 ~ 1.25%, Ti:0.06 ~ 0.12%, B:0.003 ~ 0.008%, Re:0.15 ~ 0.23%, S≤0.03%, P≤0.03%, surplus is Fe.
Preferably, in the special high hardness wear-resisting in described mine liner plate, the weight percent of each chemical composition is: C:2.56%, Cr:12.88%, Si:0.68%, Mn:0.66%, Mo:0.92%, Cu:1.10%, Ti:0.09%, B:0.005%, Re:0.19%, S:0.01%, P:0.01%, surplus is Fe.
Preferably, the manufacture method of the special high hardness wear-resisting liner plate in described mine, comprises the following steps:
(1) melting: according to above-mentioned each chemical component weight proportioning, raw material is joined in medium-frequency induction furnace and carry out melting, smelting temperature is 1570 ~ 1590 DEG C, in fusion process, chemical analysis is carried out in sampling, control each chemical composition in specialized range, 3 ~ 5min before molten iron is come out of the stove, adds ferromanganese by 0.2 ~ 0.3 kilogram, molten steel per ton and ferrosilicon carries out pre-deoxidation, finally adds 0.6 ~ 0.8 kilogram of fine aluminium by molten iron per ton and carries out final deoxygenation;
(2) pour into a mould: pour into a mould when bonded hard ferrite magnet is down to 1450 ~ 1460 DEG C, running castings are sand mold or metal mold;
(3) dead head cutting: above-mentioned shaping liner plate preheating after heat is cut, heat plane;
(4) thermal treatment: the shaping liner plate after above-mentioned heat plane is carried out surface finish process, normalizing is carried out when being then warming up to 950 ~ 1000 DEG C, quench when temperature is 900 ~ 950 DEG C, insulation 1 ~ 2h after quenching, then to come out of the stove air cooling, be tempering under the condition of 190 ~ 220 DEG C in temperature, be incubated 1 ~ 3h after tempering, namely obtain finished product abrasion-proof backing block.
Preferably, step (1) described smelting temperature is 1580 ~ 1590 DEG C.
The effect of various chemical element in the present invention:
Carbon (C): carbon content is the important factor determining carbide in cast iron lining plate and hardness.Carbon content is higher, and carbide is more, and hardness is higher, and wear resisting property is better.But the too high meeting of carbon amounts causes the poor toughness of liner plate.Therefore carbon content controls 2.15 ~ 2.80%.
Chromium (Cr): chromium content major decision carbide also can improve corrosion wear resistance.The content of chromium and carbon should ensure to make to have in alloy a certain amount of with M
7c
3(Cr, Fe)
7c
3type is main carbide, to obtain high wear resistance, hardness and impelling strength.And carbide, form and distribution determine primarily of Cr/C in rich chromium cast iron: as Cr/C > 4, eutectic carbides great majority are in M
7c
3type.But along with the raising of chromium content, the mobility of iron liquid reduces, and liner plate cold cracking inclination increases, and toughness declines, liner plate cracky, and chromium belongs to precious metal, and too much chromium can increase production cost, and chromium content controls 11.21 ~ 14.56% by comprehensive various factors simultaneously.
Silicon (Si) and manganese (Mn): manganese is the element of stable austenite, make the decline of Ms point that residual austenite is increased, but adding more manganese easily causes the fatigue wear ratio of liner plate surface layer peeling to increase, therefore control Fe content in 0.52 ~ 0.76% scope.Appropriate silicon is mainly used in deoxidation, because too high silicon will cause battle array under toughness, therefore is controlled in 0.50 ~ 0.82% scope by silicon.
Molybdenum (Mo), copper (Cu) and titanium (Ti): effect significantly improves hardening capacity, and there is the effect of stronger promotion martensitic transformation.Such alloy both can be solid-solution in ferrite or austenite, and strengthening matrix, improves the hardness of matrix, can form complicated carbide again, can also obvious refined carbides.Therefore Mo, Cu and Ti alloying element adding trace can improve the comprehensive mechanical property of liner plate.
Boron (B): can purify crystal boundary, have dispersion-strengthened action again, can thinning microstructure, significantly improves the wear resisting property of liner plate.
Rare earth element (Re): have purification, rotten and promotion alloying action to molten iron, energy deoxidation, degasification, purifying molten iron, generate oxide compound and can be used as heterogeneous forming core core, refinement matrix grain tissue, improve the morphology and distribution of carbide, content controls within 0.15 ~ 0.23%.
Sulphur (S) and phosphorus (P): for harmful unit is disorderly, reduce the mechanical property of liner plate, content all controls to be advisable below 0.03%.
(3) beneficial effect
The present invention adds the elements such as Si, Mn in liner plate, enhances liner plate matrix while deoxidation; The present invention adds Mo, Cu and Ti precious metal element in liner plate, by the compound use of precious metal element, enhances austenitic stability, crystal grain thinning, improve high-temperature stability and the red hardness of carbide, liner plate hardness of the present invention is improved further, and wear resistance is corresponding improve also.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment 1:
The special high hardness wear-resisting liner plate in the present embodiment mine, in this liner plate, the weight percent of each chemical composition is: C:2.15%, Cr:11.21%, Si:0.50%, Mn:0.52%, Mo:0.89%, Cu:0.90%, Ti:0.06%, B:0.003%, Re:0.15%, S:0.005%, P:0.005%, surplus is Fe.
According to the weight percent of chemical composition each in the present embodiment, preparation method comprises the following steps:
(1) melting: according to above-mentioned each chemical component weight proportioning, raw material is joined in medium-frequency induction furnace and carry out melting, smelting temperature is 1570 DEG C, in fusion process, chemical analysis is carried out in sampling, control each chemical composition in specialized range, 3 ~ 5min before molten iron is come out of the stove, adds ferromanganese by 0.2 kilogram, molten steel per ton and ferrosilicon carries out pre-deoxidation, finally adds 0.6 kilogram of fine aluminium by molten iron per ton and carries out final deoxygenation;
(2) pour into a mould: pour into a mould when bonded hard ferrite magnet is down to 1450 DEG C, running castings are sand mold or metal mold;
(3) dead head cutting: above-mentioned shaping liner plate preheating after heat is cut, heat plane;
(4) thermal treatment: the shaping liner plate after above-mentioned heat plane is carried out surface finish process, normalizing is carried out when being then warming up to 950 DEG C, quench when temperature is 900 DEG C, 1h is incubated after quenching, then to come out of the stove air cooling, be tempering under the condition of 190 DEG C in temperature, be incubated 1h after tempering, namely obtain finished product abrasion-proof backing block.
Embodiment 2:
The special high hardness wear-resisting liner plate in the present embodiment mine, in this liner plate, the weight percent of each chemical composition is: C:2.56%, Cr:12.88%, Si:0.68%, Mn:0.66%, Mo:0.92%, Cu:1.10%, Ti:0.09%, B:0.005%, Re:0.19%, S:0.01%, P:0.01%, surplus is Fe.
According to the weight percent of chemical composition each in the present embodiment, preparation method comprises the following steps:
(1) melting: according to above-mentioned each chemical component weight proportioning, raw material is joined in medium-frequency induction furnace and carry out melting, smelting temperature is 1580 DEG C, in fusion process, chemical analysis is carried out in sampling, control each chemical composition in specialized range, 3 ~ 5min before molten iron is come out of the stove, adds ferromanganese by 0.25 kilogram, molten steel per ton and ferrosilicon carries out pre-deoxidation, finally adds 0.7 kilogram of fine aluminium by molten iron per ton and carries out final deoxygenation;
(2) pour into a mould: pour into a mould when bonded hard ferrite magnet is down to 1455 DEG C, running castings are sand mold or metal mold;
(3) dead head cutting: above-mentioned shaping liner plate preheating after heat is cut, heat plane;
(4) thermal treatment: the shaping liner plate after above-mentioned heat plane is carried out surface finish process, carries out normalizing when being then warming up to 970 DEG C, quench when temperature is 930 DEG C, insulation 1 after quenching.5h, air cooling of then coming out of the stove, is tempering under the condition of 210 DEG C in temperature, is incubated 2h, namely obtains finished product abrasion-proof backing block after tempering.
Embodiment 3:
The special high hardness wear-resisting liner plate in the present embodiment mine, in this liner plate, the weight percent of each chemical composition is: C:2.80%, Cr:14.56%, Si:0.82%, Mn:0.76%, Mo:1.05%, Cu:1.25%, Ti:0.12%, B:0.008%, Re:0.23%, S:0.02%, P:0.02%, surplus is Fe.
According to the weight percent of chemical composition each in the present embodiment, preparation method comprises the following steps:
(1) melting: according to above-mentioned each chemical component weight proportioning, raw material is joined in medium-frequency induction furnace and carry out melting, smelting temperature is 1590 DEG C, in fusion process, chemical analysis is carried out in sampling, control each chemical composition in specialized range, 3 ~ 5min before molten iron is come out of the stove, adds ferromanganese by 0.3 kilogram, molten steel per ton and ferrosilicon carries out pre-deoxidation, finally adds 0.8 kilogram of fine aluminium by molten iron per ton and carries out final deoxygenation;
(2) pour into a mould: pour into a mould when bonded hard ferrite magnet is down to 1460 DEG C, running castings are sand mold or metal mold;
(3) dead head cutting: above-mentioned shaping liner plate preheating after heat is cut, heat plane;
(4) thermal treatment: the shaping liner plate after above-mentioned heat plane is carried out surface finish process, normalizing is carried out when being then warming up to 1000 DEG C, quench when temperature is 950 DEG C, 2h is incubated after quenching, then to come out of the stove air cooling, be tempering under the condition of 220 DEG C in temperature, be incubated 3h after tempering, namely obtain finished product abrasion-proof backing block.
It should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operational zone, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
Above embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit, although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (4)
1. the special high hardness wear-resisting liner plate in mine and a manufacture method thereof, is characterized in that, in this liner plate, the weight percent of each chemical composition is: C:2.15 ~ 2.80%,, Cr:11.21 ~ 14.56%, Si:0.50 ~ 0.82%, Mn:0.52 ~ 0.76%, Mo:0.89 ~ 1.05%, Cu:0.90 ~ 1.25%, Ti:0.06 ~ 0.12%, B:0.003 ~ 0.008%, Re:0.15 ~ 0.23%, S≤0.03%, P≤0.03%, surplus is Fe.
2. the special high hardness wear-resisting liner plate in mine according to claim 1, is characterized in that, in this liner plate, the weight percent of each chemical composition is: C:2.56%, Cr:12.88%, Si:0.68%, Mn:0.66%, Mo:0.92%, Cu:1.10%, Ti:0.09%, B:0.005%, Re:0.19%, S:0.01%, P:0.01%, surplus is Fe.
3. the manufacture method of the special high hardness wear-resisting liner plate in mine according to claim 1 and 2, is characterized in that, comprise the following steps:
(1) melting: according to above-mentioned each chemical component weight proportioning, raw material is joined in medium-frequency induction furnace and carry out melting, smelting temperature is 1570 ~ 1590 DEG C, in fusion process, chemical analysis is carried out in sampling, control each chemical composition in specialized range, 3 ~ 5min before molten iron is come out of the stove, adds ferromanganese by molten iron per ton 0.2 ~ 0.3 kilogram and ferrosilicon carries out pre-deoxidation, finally adds 0.6 ~ 0.8 kilogram of fine aluminium by molten iron per ton and carries out final deoxygenation;
(2) pour into a mould: pour into a mould when bonded hard ferrite magnet is down to 1450 ~ 1460 DEG C, running castings are sand mold or metal mold;
(3) dead head cutting: above-mentioned shaping liner plate preheating after heat is cut, heat plane;
(4) thermal treatment: the shaping liner plate after above-mentioned heat plane is carried out surface finish process, normalizing is carried out when being then warming up to 950 ~ 1000 DEG C, quench when temperature is 900 ~ 950 DEG C, insulation 1 ~ 2h after quenching, then to come out of the stove air cooling, be tempering under the condition of 190 ~ 220 DEG C in temperature, be incubated 1 ~ 3h after tempering, namely obtain finished product abrasion-proof backing block.
4. the manufacture method of the special high hardness wear-resisting liner plate in mine according to claim 3, is characterized in that, step (1) described smelting temperature is 1580 ~ 1590 DEG C.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106191642A (en) * | 2016-07-01 | 2016-12-07 | 宁国市开源电力耐磨材料有限公司 | A kind of impact breaker high-chromium alloy abrasion-proof backing block and preparation method thereof |
| CN107620009A (en) * | 2017-08-23 | 2018-01-23 | 宁国慧宏耐磨材料有限公司 | One kind is used for small-sized tube mill low manganess steel ball and preparation method thereof |
| CN111151709A (en) * | 2020-01-13 | 2020-05-15 | 东台市强圣精密铸造有限公司 | Precision casting method of wear-resistant steel part |
| CN111534749A (en) * | 2020-05-12 | 2020-08-14 | 新疆红电金铸耐磨材料有限责任公司 | Ultra-high carbon bainite steel lining plate and preparation method thereof |
| CN113564452A (en) * | 2021-07-13 | 2021-10-29 | 山西滨腾机械有限公司 | Water quenching lining plate and preparation method and application thereof |
| CN113833461A (en) * | 2021-10-25 | 2021-12-24 | 徐州中矿汇弘矿山设备有限公司 | Coal mining machine roller assembly and coal mining machine |
| CN114932196A (en) * | 2022-06-02 | 2022-08-23 | 邯郸慧桥复合材料科技有限公司 | Double-structure hammer head and manufacturing method thereof |
| CN114959431A (en) * | 2022-06-02 | 2022-08-30 | 邯郸慧桥复合材料科技有限公司 | Large-scale semi-autogenous mill lining plate and manufacturing method thereof |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106191642A (en) * | 2016-07-01 | 2016-12-07 | 宁国市开源电力耐磨材料有限公司 | A kind of impact breaker high-chromium alloy abrasion-proof backing block and preparation method thereof |
| CN106191642B (en) * | 2016-07-01 | 2017-12-29 | 宁国市开源电力耐磨材料有限公司 | A kind of impact breaker high-chromium alloy wearable liner and preparation method thereof |
| CN107620009A (en) * | 2017-08-23 | 2018-01-23 | 宁国慧宏耐磨材料有限公司 | One kind is used for small-sized tube mill low manganess steel ball and preparation method thereof |
| CN111151709A (en) * | 2020-01-13 | 2020-05-15 | 东台市强圣精密铸造有限公司 | Precision casting method of wear-resistant steel part |
| CN111534749A (en) * | 2020-05-12 | 2020-08-14 | 新疆红电金铸耐磨材料有限责任公司 | Ultra-high carbon bainite steel lining plate and preparation method thereof |
| CN113564452A (en) * | 2021-07-13 | 2021-10-29 | 山西滨腾机械有限公司 | Water quenching lining plate and preparation method and application thereof |
| CN113564452B (en) * | 2021-07-13 | 2022-05-20 | 山西滨腾机械有限公司 | Water quenching lining plate and preparation method and application thereof |
| CN113833461A (en) * | 2021-10-25 | 2021-12-24 | 徐州中矿汇弘矿山设备有限公司 | Coal mining machine roller assembly and coal mining machine |
| CN114932196A (en) * | 2022-06-02 | 2022-08-23 | 邯郸慧桥复合材料科技有限公司 | Double-structure hammer head and manufacturing method thereof |
| CN114959431A (en) * | 2022-06-02 | 2022-08-30 | 邯郸慧桥复合材料科技有限公司 | Large-scale semi-autogenous mill lining plate and manufacturing method thereof |
| CN114959431B (en) * | 2022-06-02 | 2023-02-28 | 邯郸慧桥复合材料科技有限公司 | Large-scale semi-autogenous mill lining plate and manufacturing method thereof |
| CN114932196B (en) * | 2022-06-02 | 2024-04-16 | 邯郸慧桥复合材料科技有限公司 | Double-tissue hammer and manufacturing method thereof |
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