CN105970103A - Zirconium element doped alloy steel material - Google Patents
Zirconium element doped alloy steel material Download PDFInfo
- Publication number
- CN105970103A CN105970103A CN201610334564.8A CN201610334564A CN105970103A CN 105970103 A CN105970103 A CN 105970103A CN 201610334564 A CN201610334564 A CN 201610334564A CN 105970103 A CN105970103 A CN 105970103A
- Authority
- CN
- China
- Prior art keywords
- steel material
- alloy steel
- carbide
- sintering
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/16—Metallic particles coated with a non-metal
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
-
- 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
-
- 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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
Abstract
The invention discloses a zirconium element doped alloy steel material. The zirconium element doped alloy steel material is prepared from, by weight percent, 0.2%-0.6% of carbon, 1.6%-2.5% of silicon, 1.0%-1.5% of manganese, 2.6%-2.8% of molybdenum, 0.3%-0.5% of boron, 0.04%-0.06% of zirconium, 0.003%-0.05% of aluminum, 0.01%-0.02% of iridium, not larger than 0.015% of sulfur, not larger than 0.015% of phosphorus and the balance iron and inevitable impurities. The prepared alloy steel material is attractive in appearance, large in rigidity, high in wear and corrosion resistance and low in cost; the preparation process is simple, and high operability is achieved; and the alloy steel material has few product defects and is worthy of popularization.
Description
Technical field
The present invention relates to technical field of automobile parts, particularly relate to one and mix zr element alloy steel material.
Background technology
Along with gradually stepping up of people's living standard, automobile becomes the main traffic instrument of people's trip, and automotive material is typically made up of ferrous materials, the intensity of Yin Qigao and good toughness in mechanical engineering manufacturing industry in occupation of critical role.In recent years, mechanical engineering structure develops to hugeization, high parameter direction day by day, the performance of ferrous materials is proposed the highest requirement, and outer addition particle strengthening ferrous materials has all many advantages, but often to reduce plasticity and toughness as cost on the premise of increasing intensity, hardness.Qin Sen selects NbC as hardening constituent granule in " nanometer NbC/Fe (Fe3C) the composite powder technology of preparing of additional particle strengthening iron and application " literary composition, melting with casting process are added in mild steel and rich chromium cast iron solution respectively, to reach iron and steel structure refinement and the purpose of mechanical property strengthening.Niobium carbide has the performances such as high-melting-point, high rigidity, high elastic modulus, high abrasion, Thermodynamically stable, so these features become hardening constituent ideal in ferrous materials and are widely used.But how to realize particles of niobium carbide to be uniformly distributed in metallic matrix and be the primary key issue solved with the good combination of basal body interface.Author proposes composite powder and strengthens particles of niobium carbide method of dispersibility in molten steel, he proposes to add aluminium powder in niobium-graphite nodule mill body system, realize the displaced type solid solution in Nb lattice of the Al atom, (Nb-Al) C solid solution heating that ball milling is formed, obtain the niobium carbide carbide of Al doping, the real density of particles of niobium carbide is reduced to the density value close to iron and steel liquid.Additionally propose enhancing particles of niobium carbide problem of dispersibility in iron and steel liquid, realize particles of niobium carbide in-situ preparation in iron powder matrix by non-homogeneous for niobium carbide solid-solution powder adds Fe powder through heating in vacuum, this enhance niobium carbide dispersibility in iron and steel liquid.Although author each provides a kind of close to the liquid-tight angle value of iron and steel with a kind of two kinds of niobium carbide composite powders of good dispersion in iron and steel liquid, but dispersibility and density value problem can not have been resolved in steelmaking process simultaneously, limit steel industry to develop on a large scale, and aluminium powder is susceptible to oxidation, when aluminum niobium carbide is mixed in preparation, quality stability is the highest, has a strong impact on reinforced effects.
In addition metallic matrix constituent element determines the hardness of material, intensity, mechanical property and the physical property such as heat-resisting, and lubricant component can reduce or eliminate bonding and clamping stagnation, reduce surface abrasion, steadily friction process, friction component is for compensating the impact of solid lubrication constituent element and increasing resistance to sliding on the premise of not damaging friction surface, for adjusting friction factor, play a part friction, wear-resistant and anti stick.Rationally select friction component most important to raising friction material and anti-wear performance.The present invention selects have the good vanadium carbide of high-melting-point, high rigidity and the ferrum compatibility and makes anti-friction composition together with other materials and add the anti-wear performance improving steel alloy in iron and steel matrix liquid to; make it in the case of heavy duty, low speed and high-temperature vibrating; material and equipment are played the effect of protection, increases the service life.
Summary of the invention
The object of the invention is contemplated to make up the defect of prior art, it is provided that one mixes zr element alloy steel material.
The present invention is achieved by the following technical solutions:
One mixes zr element alloy steel material, prepares in accordance with the following steps:
A, melting: raise in-furnace temperature after the pig iron is fused into molten steel to 1500-1560 DEG C, add carbon, ferrosilicon, molybdenum and manganese, boron, phosphorus, sulfur, iridium and zirconium is added after insulation 20-45min, add modified niobium carbide until completely melted, liter high-temperature is to 1630-1660 DEG C, and constant temperature is kept stirring for 5-10min and obtains matrix alloy liquid；
B, refine: be transferred in refining furnace carry out deslagging process by matrix alloy liquid, process terminates to add anti-friction composition and continues melting, and anti-friction composition is 3-4 kg/tonne with the amount ratio of molten steel, carries out secondary deslagging process after it is completely melt；
C, detection: the constituent content of detection aluminium alloy, each element is by weight percentage: carbon: 0.2-0.6%, silicon: 1.6-2.5%, manganese: 1.0-1.5%, molybdenum: 2.6-2.8%, boron 0.3-0.5%, zirconium: 0.04-0.06%, aluminum: 0.003-0.05%, iridium: 0.01-0.02%, sulfur≤0.015%, phosphorus≤0.015%, surplus is ferrum and inevitable impurity；
D, cast: be cast in fire-resistant casting mold when aluminium alloy temperature is reduced to 1450-1550 DEG C, be cooled to room temperature.
nullDescribed one mixes zr element alloy steel material，In a，The preparation method of described modified niobium carbide is: by graphite powder、Niobium powder loads in ball grinder according to atomic mass 1:1，High-purity argon gas protection it is filled with after evacuation，In ratio of grinding media to material 40:1、Ball milling 6-6.5h under the rotating speed of rotating speed 280r/min，Then heating in vacuum 12-15min at 550-600 DEG C，After insulation 14-16min, natural cooling is standby，Aluminium powder is transferred in the there-necked flask with agitator after ultrasonic disperse 10min in isopropanol，It is placed in 70-75 DEG C of water bath with thermostatic control and is sufficiently stirred for，Add the polyvinylpyrrolidone of aluminium powder quality 2%，Regulation pH value is 3.9-4.0，Then a certain amount of 0.2mol/L liquor ferri trichloridi is slowly dropped in flask，Controlling to drip speed is every 3s，Reaction is aged 2-3h after terminating，Sucking filtration、Distilled water wash 2 times，Put into after drying in Muffle furnace in 450 DEG C of calcining 2h coolings，Obtain the composite granule of ferric oxide coated aluminum，It is added to this composite granule in above-mentioned niobium carbide powder again continue ball milling 6-7h，Cool down after heating in vacuum 1-2min at 550-600 DEG C after end.
Described one mixes zr element alloy steel material, and in b, described anti-friction composition is made up of following raw materials according: polyvinyl alcohol 0.3-0.4, vanadium carbide 3-4, graphite 0.2-0.4, titanium carbide 1.3-2, Acetylenogen. 0.3-0.4；By polyvinyl alcohol by appropriate deionized water stirring and dissolving, by Acetylenogen., graphite, vanadium carbide, titanium carbide mixing and ball milling 4-5h in batch mixer, it is added to after mix homogeneously in poly-vinyl alcohol solution mix thoroughly and dry, then cold-press moulding under the pressure of 500-600MPa, pressed compact is placed in pressurized sintering furnace and carries out pressure sintering, sintering temperature is 920-940 DEG C, and sintering pressure is 2MPa, pulverizes after sintering 3h.
Described one mixes zr element alloy steel material, and described aluminum and iron sesquioxide mass ratio are 1:0.7-0.75, and the iron sesquioxide aluminum composite granule of addition and the weight ratio of niobium carbide are 1:41-43.
The invention have the advantage that the present invention utilizes ferric chloride hydrolysis to prepare ferric oxide coated aluminum powder, it is effectively prevented aluminium powder to aoxidize, and improve the dispersion problem of aluminium powder, modified aluminium powder is mixed in particles of niobium carbide by recycling mechanical alloying, prepare close to molten steel density value, and in molten steel dispersibility, the particles of niobium carbide that wettability is good, improve the intensity of steel, hardness, wear-resistant, shock resistance, the performance such as corrosion-resistant, vanadium carbide and other materials is also used to add in iron and steel liquid after pressure sintering is broken, improve the contact area with iron and steel, wettability, dispersibility and reactivity, steel are made to have excellent wearability, heat-resisting quantity and electric erosion resistance etc.；Alloy steel material good looking appearance of the present invention, rigidity is big, and wear-and corrosion-resistant performance is high, low cost, and preparation technology is simple, workable, and product defects is few, is worthy to be popularized.
Detailed description of the invention
One mixes zr element alloy steel material, prepares in accordance with the following steps:
A, melting: raise in-furnace temperature after the pig iron is fused into molten steel to 1500 DEG C, add carbon, ferrosilicon, molybdenum and manganese, add boron, phosphorus, sulfur, iridium and zirconium after insulation 20min, add modified niobium carbide until completely melted, liter high-temperature is to 1630 DEG C, and constant temperature is kept stirring for 5min and obtains matrix alloy liquid；
B, refine: be transferred in refining furnace carry out deslagging process by matrix alloy liquid, process terminates to add anti-friction composition and continues melting, and anti-friction composition is 3 kgs/tonne with the amount ratio of molten steel, carries out secondary deslagging process after it is completely melt；
C, detection: the constituent content of detection aluminium alloy, each element is by weight percentage: carbon: 0.2%, silicon: 1.6%, manganese: 1.0%, molybdenum: 2.6%, boron 0.3%, zirconium: 0.04%, aluminum: 0.003%, iridium: 0.01%, sulfur≤0.015%, phosphorus≤0.015%, surplus is ferrum and inevitable impurity；
D, cast: be cast in fire-resistant casting mold when aluminium alloy temperature is reduced to 1450 DEG C, be cooled to room temperature.
nullDescribed one mixes zr element alloy steel material，In a，The preparation method of described modified niobium carbide is: by graphite powder、Niobium powder loads in ball grinder according to atomic mass 1:1，High-purity argon gas protection it is filled with after evacuation，In ratio of grinding media to material 40:1、Ball milling 6h under the rotating speed of rotating speed 280r/min，Then heating in vacuum 12min at 550 DEG C，After insulation 14min, natural cooling is standby，Aluminium powder is transferred in the there-necked flask with agitator after ultrasonic disperse 10min in isopropanol，It is placed in 70 DEG C of waters bath with thermostatic control and is sufficiently stirred for，Add the polyvinylpyrrolidone of aluminium powder quality 2%，Regulation pH value is 3.9，Then a certain amount of 0.2mol/L liquor ferri trichloridi is slowly dropped in flask，Controlling to drip speed is every 3s，Reaction is aged 2h after terminating，Sucking filtration、Distilled water wash 2 times，Put into after drying in Muffle furnace in 450 DEG C of calcining 2h coolings，Obtain the composite granule of ferric oxide coated aluminum，It is added to this composite granule in above-mentioned niobium carbide powder again continue ball milling 6h，Cool down after heating in vacuum 1min at 550 DEG C after end.
Described one mixes zr element alloy steel material, and in b, described anti-friction composition is made up of following raw materials according: polyvinyl alcohol 0.3, vanadium carbide 3, graphite 0.2, titanium carbide 1.3, Acetylenogen. 0.3；By polyvinyl alcohol by appropriate deionized water stirring and dissolving, by Acetylenogen., graphite, vanadium carbide, titanium carbide mixing and ball milling 4h in batch mixer, it is added to after mix homogeneously in poly-vinyl alcohol solution mix thoroughly and dry, then cold-press moulding under the pressure of 500MPa, pressed compact is placed in pressurized sintering furnace and carries out pressure sintering, sintering temperature is 920 DEG C, and sintering pressure is 2MPa, pulverizes after sintering 3h.
Described one mixes zr element alloy steel material, and described aluminum and iron sesquioxide mass ratio are 1:0.7, and the iron sesquioxide aluminum composite granule of addition and the weight ratio of niobium carbide are 1:41.
The steel preparing embodiment carry out performance test:
Yield strength >=543MPa；Elongation percentage >=13.7%；Tensile strength >=587MPa；Impact strength >=49J；Fracture toughness >=34.1MPa m1/2；Wear extent (under 40N load)≤0.06g.
Claims (4)
1. mix zr element alloy steel material for one kind, it is characterised in that prepare in accordance with the following steps:
A, melting: raise in-furnace temperature after the pig iron is fused into molten steel to 1500-1560 DEG C, add carbon, ferrosilicon, molybdenum and manganese, boron, phosphorus, sulfur, iridium and zirconium is added after insulation 20-45min, add modified niobium carbide until completely melted, liter high-temperature is to 1630-1660 DEG C, and constant temperature is kept stirring for 5-10min and obtains matrix alloy liquid；
B, refine: be transferred in refining furnace carry out deslagging process by matrix alloy liquid, process terminates to add anti-friction composition and continues melting, and anti-friction composition is 3-4 kg/tonne with the amount ratio of molten steel, carries out secondary deslagging process after it is completely melt；
C, detection: the constituent content of detection aluminium alloy, each element is by weight percentage: carbon: 0.2-0.6%, silicon: 1.6-2.5%, manganese: 1.0-1.5%, molybdenum: 2.6-2.8%, boron 0.3-0.5%, zirconium: 0.04-0.06%, aluminum: 0.003-0.05%, iridium: 0.01-0.02%, sulfur≤0.015%, phosphorus≤0.015%, surplus is ferrum and inevitable impurity；
D, cast: be cast in fire-resistant casting mold when aluminium alloy temperature is reduced to 1450-1550 DEG C, be cooled to room temperature.
nullThe most according to claim 1, one mixes zr element alloy steel material，It is characterized in that，In a，The preparation method of described modified niobium carbide is: by graphite powder、Niobium powder loads in ball grinder according to atomic mass 1:1，High-purity argon gas protection it is filled with after evacuation，In ratio of grinding media to material 40:1、Ball milling 6-6.5h under the rotating speed of rotating speed 280r/min，Then heating in vacuum 12-15min at 550-600 DEG C，After insulation 14-16min, natural cooling is standby，Aluminium powder is transferred in the there-necked flask with agitator after ultrasonic disperse 10min in isopropanol，It is placed in 70-75 DEG C of water bath with thermostatic control and is sufficiently stirred for，Add the polyvinylpyrrolidone of aluminium powder quality 2%，Regulation pH value is 3.9-4.0，Then a certain amount of 0.2mol/L liquor ferri trichloridi is slowly dropped in flask，Controlling to drip speed is every 3s，Reaction is aged 2-3h after terminating，Sucking filtration、Distilled water wash 2 times，Put into after drying in Muffle furnace in 450 DEG C of calcining 2h coolings，Obtain the composite granule of ferric oxide coated aluminum，It is added to this composite granule in above-mentioned niobium carbide powder again continue ball milling 6-7h，Cool down after heating in vacuum 1-2min at 550-600 DEG C after end.
The most according to claim 1, one mixes zr element alloy steel material, it is characterised in that in b, and described anti-friction composition is made up of following raw materials according: polyvinyl alcohol 0.3-0.4, vanadium carbide 3-4, graphite 0.2-0.4, titanium carbide 1.3-2, Acetylenogen. 0.3-0.4；By polyvinyl alcohol by appropriate deionized water stirring and dissolving, by Acetylenogen., graphite, vanadium carbide, titanium carbide mixing and ball milling 4-5h in batch mixer, it is added to after mix homogeneously in poly-vinyl alcohol solution mix thoroughly and dry, then cold-press moulding under the pressure of 500-600MPa, pressed compact is placed in pressurized sintering furnace and carries out pressure sintering, sintering temperature is 920-940 DEG C, and sintering pressure is 2MPa, pulverizes after sintering 3h.
The most according to claim 2, one mixes zr element alloy steel material, it is characterised in that described aluminum and iron sesquioxide mass ratio are 1:0.7-0.75, and the iron sesquioxide aluminum composite granule of addition and the weight ratio of niobium carbide are 1:41-43.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610334564.8A CN105970103A (en) | 2016-05-18 | 2016-05-18 | Zirconium element doped alloy steel material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610334564.8A CN105970103A (en) | 2016-05-18 | 2016-05-18 | Zirconium element doped alloy steel material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105970103A true CN105970103A (en) | 2016-09-28 |
Family
ID=56955341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610334564.8A Pending CN105970103A (en) | 2016-05-18 | 2016-05-18 | Zirconium element doped alloy steel material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105970103A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1243169A (en) * | 1998-07-27 | 2000-02-02 | 通用电气公司 | Alloy steel |
| CN103014819A (en) * | 2011-09-27 | 2013-04-03 | 肖云捷 | Wearable compound layer material for machine parts and manufacturing method and equipment thereof |
| CN104053806A (en) * | 2012-01-26 | 2014-09-17 | 杰富意钢铁株式会社 | High-strength hot-rolled steel sheet and method for producing same |
-
2016
- 2016-05-18 CN CN201610334564.8A patent/CN105970103A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1243169A (en) * | 1998-07-27 | 2000-02-02 | 通用电气公司 | Alloy steel |
| CN103014819A (en) * | 2011-09-27 | 2013-04-03 | 肖云捷 | Wearable compound layer material for machine parts and manufacturing method and equipment thereof |
| CN104053806A (en) * | 2012-01-26 | 2014-09-17 | 杰富意钢铁株式会社 | High-strength hot-rolled steel sheet and method for producing same |
Non-Patent Citations (1)
| Title |
|---|
| 秦森: "外加颗粒强化铁基材料的纳米NbC/Fe(Fe_3C)复合粉末制备技术及应用", 《中国博士学位论文全文数据库 工程科技I辑》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103757516B (en) | wear-resistant white cast iron and preparation method thereof | |
| CN101880746B (en) | Preparation process of nano powder modified and reinforced die steels | |
| CN105803335A (en) | High-heat-resistance alloy steel material used for brake pad | |
| CN105970102A (en) | High-impact-toughness alloy steel material for automobile connecting rod spring | |
| CN102357653A (en) | Preparation process for nanoparticle reinforced die steel | |
| Kvon et al. | Effect of inoculant introducing on improving ingot structure | |
| CN105886897A (en) | High-fatigue-resistance alloy steel material for automobile crankshafts | |
| CN113930663B (en) | Gray cast iron with high thermal conductivity and high strength | |
| CN103924166B (en) | A kind of preparation method of high mangaenese steel | |
| CN105838965A (en) | Alloy steel material for engine piston | |
| CN115261713B (en) | Preparation method of high-hardness high-toughness wear-resistant high-chromium cast iron | |
| CN107747031A (en) | A kind of wear-resistant ball of corrosion-resistant low abrasion and preparation method thereof | |
| CN106811677A (en) | A kind of piston ring carrier cast iron materials and its manufacture method | |
| CN105803316A (en) | High-chromium wear-resistance alloy steel material and preparing method thereof | |
| CN105950980A (en) | Wear-resisting alloy steel material for automobile hub | |
| CN105908070A (en) | Automobile spring material with good brittleness resistance and good rupture resistance | |
| CN105970103A (en) | Zirconium element doped alloy steel material | |
| CN104651705A (en) | Wear-resisting hypereutectic high-chromium cast iron and preparation method thereof | |
| CN105886898A (en) | High-elongation alloy steel material for automobile springs | |
| CN104073712A (en) | High-carbon vanadium titanium grey cast iron and manufacturing method thereof, as well as vehicle brake disk and manufacturing method thereof | |
| CN105970089A (en) | Easily-machined antifriction alloy steel material for automobile part | |
| CN105803328A (en) | Environment-friendly and low-production-cost alloy steel material used for automobile | |
| CN105803315A (en) | Good-creep-resistance alloy steel material used for automobile part | |
| CN105886925A (en) | Acid-corrosion-resistant alloy steel material for automobiles | |
| CN105886899A (en) | Low-temperature-resistant anti-crack alloy steel material for automobiles |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160928 |