CN109530675A - A method of direct-reduction iron powder is formed into profile by short route hot extrusion/rolling - Google Patents
A method of direct-reduction iron powder is formed into profile by short route hot extrusion/rolling Download PDFInfo
- Publication number
- CN109530675A CN109530675A CN201811249626.0A CN201811249626A CN109530675A CN 109530675 A CN109530675 A CN 109530675A CN 201811249626 A CN201811249626 A CN 201811249626A CN 109530675 A CN109530675 A CN 109530675A
- Authority
- CN
- China
- Prior art keywords
- hot
- steel
- steel billet
- powder
- rolling
- 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
-
- 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
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
-
- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
- B22F3/04—Compacting only by applying fluid pressure, e.g. by cold isostatic pressing [CIP]
-
- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
-
- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/18—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by using pressure rollers
-
- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/20—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by extruding
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
-
- 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
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
-
- 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
- C22C38/16—Ferrous alloys, e.g. steel alloys containing 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
- C22C38/20—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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
-
- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/20—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by extruding
- B22F2003/208—Warm or hot extruding
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention belongs to technical field of metal material more particularly to a kind of iron powder that will be reduced directly to pass through the method that short route hot extrusion/rolling forms profile.Process flow of the invention is direct-reduction iron powder-isostatic cool pressing-heat-agglomerating-hot extrusion/rolling-steel-product.Raw material sources of the present invention are extensive, production procedure is short, small investment, and occupied area is small, it can be improved and stablize steel quality of item, production run is at low cost, and gained injection moulding product application is extensive, straight carbon steel, steel alloy multi items steel or the component of machine blank of acquisition, with low energy consumption, it is pollution-free, energy conservation and environmental protection carbon drop, Measurements For High Output And Benefit.
Description
Technical field
The invention belongs to technical field of metal material more particularly to a kind of iron powder that will be reduced directly to pass through short route hot extrusion
The method that pressure/rolling forms profile.
Background technique
International steel production, is usually used blast furnace ironmaking-converter (electric arc furnaces) steel-smelting continuous casting (ingot casting)-
The method of hot rolling, existing more than 200 years history of this production method, nowadays apparently, this method is big with investment, occupied area is wide,
Process is tedious, long flow path, it is seriously polluted the problems such as.Therefore, country advocate in recent years greatly develop direct reduced iron, non-burnt ironmaking and
The application of the new smelting process technology such as mini-mill steelmaking.
The problems such as in order to solve energy conservation and environmental protection and excess capacity, country have put into effect the steel production capacity of 200,000,000 tons of compression；Ban 1
The relevant policies such as the Small Foundry of ten thousand tons of Sub-scales, and as China " made in China 2025 " development strategic objective mentions
Out, the equipment manufacture in China will necessarily will also be greatly developed, and when arriving founding of New 100 years, comprehensive strength enters world's system
Make power forefront, steel, component of machine, special steel demand also can be bigger, so, more it is necessary to develop low-cost high-efficiency
Steel material, component of machine, special steel update, forward position, scale, economical and efficient new production process technology, come it is military
It fills and meets China and grow stronger day by day and powerful machinery manufacturing industry.
Powder metallurgy casting die product developing history is very long, and the component of machine of preparation has unique composition and mechanical, object
Rationality energy, and these performances can not be obtained with traditional casting method.It can be directly prepared into PM technique more
Hole, half fine and close or full dense material and product, such as oiliness bearing, gear, cam, guide rod, cutter, be it is a kind of it is few/without cutting
Technique, application are also more and more extensive.PM technique has become the key for solving the problems, such as new material, in the development of new material
Play very important effect.But the goods cost of current powder metallurgical technique is very high, generally at 8000~20000 yuan/ton,
Cost is very high, and sintered metal product generally can only produce 1~2kg of piece weight hereinafter, being not possible to production tens kilograms, even 1
The relatively large component of ton weight, therefore, low side, middle-end mechanical part are not possible to substitute using sintered metal product.Recent decades,
Optimization, the developing of technology develop slowly, and sintered metal product although has great advantage and feature, but its cost and price is also very high
It is expensive, and restrict the main problem of its technology development.
I declares that disclosed " 2017103207981 is a kind of logical using metallurgical solid waste, direct-reduction iron powder and regeneration iron powder
Cross the method that injection moulding forms high strength machine parts " and " a kind of 2017104472768 powdery iron ore direct reduced iron hot pressing are forged
Stocking/component of machine product method " patent of invention, the index of component of machine can be promoted into a very large space,
But still need to be optimized and perfect, realize scale, big quantization, intelligent production and processing steel material and machinery zero
The products such as component.
Summary of the invention
The present invention in view of the deficiency of the prior art, provide it is a kind of will direct-reduction iron powder by short route hot extrusion
The method that pressure/rolling forms profile.
The technical scheme to solve the above technical problems is that a kind of pass through short route hot extrusion for direct-reduction iron powder
The method that pressure/rolling forms profile, steps are as follows:
(1) raw material is prepared
Using TFe97-99%, η Fe >=98.5%, C≤0.5%, 5~74 μm of fineness of direct-reduction iron powder, it is added straight
Connect reduced iron powder weight 0.5-0.75% plasticizer and 0-35% with addition of powder, uniformly mix 30-120min, obtain mixing；
(2) isostatic cool pressing steel billet
At -20~40 DEG C, the mixing of step (1) is added in cold isostatic mould, using hydraulic press upper punch and liquid
Press bottom punch is squeezed respectively from both ends are opposite with isostatic cool pressing, and the pressure that isostatic cool pressing squeezes is 780-900MPa/
cm2；Mixing is pressed into steel billet by cold-extruded, then the steel billet of formation is squeezed out cold isostatic mould by hydraulic press upper punch；
(3) heat-agglomerating
The steel billet of step (2) is added in heating kiln and carries out heat-agglomerating, control heating temperature is 1050-1400 DEG C,
30-120min is kept the temperature, hot steel billet is obtained；
(4) hot extrusion/rolling is become a useful person
The hot steel billet of step (3) is passed through into hot extrusion or roll forming, steel-product is made.
Further, plasticizer described in step (1) is 5-25 μm of fineness, the polyethanol class wax powder of 110 DEG C of dropping point.
Beneficial effect using above-mentioned further scheme is that polyethanol class wax powder can improve the processability of pressing component
Energy, lustrous surface, lubricity and thermal stability；It can significantly reduce coefficient of friction of the powder in dynamic and static compacting；It can
To improve the rate of extrusion forming as lubricant, increase mold flow；It can be used as remover, in the extruding of room temperature powder
It is good bonding agent, noresidue after high-temperature heating.Therefore, the polyethylene wax that the present invention uses-PE class wax powder, is provided simultaneously with
The effect of binder, lubricant and release agent, is referred to as plasticizer.
It further, is metallic silicon power, manganese powder, the metal of fineness 200-2000 mesh with addition of powder described in step (1)
Two or more mixing in copper powder, metal nickel powder, hafnium metal powfer or graphite powder.
Beneficial effect using above-mentioned further scheme is, when whole product is variety steel or steel alloy, needs in mixing
Alloyed powder is added or non-metal powder is used as with addition of powder.
Further, the isostatic cool pressing in step (2) uses the press machine of 1000~20000t；Gained steel billet density is 6.3
~7.0t/m3；The round billet or height × width x length that gained steel billet is 150~￠ of ￠ 220mm are (120~220) × (120~220)
The square billet of × (500~3000) mm.
Further, heating kiln described in step (3) be hydrogen reduction heating kiln or inert gas shielding plus
Heating kiln furnace；Wherein, the inert gas is nitrogen or other inert gases.
Further, hot extrusion process described in step (4) are as follows: hot-extrusion mold is added in the hot steel billet of step (3), is adopted
Moved forwards with the hot upper punch of hydraulic press, squeezed with hot isostatic pressing, hot isostatic pressing squeeze pressure be 720~
980MPa/cm2, hot steel billet is squeezed into steel-product by hot-extrusion mold die orifice.
Further, the operation of rolling described in step (4) are as follows: roughing milling train is added in the hot steel billet of step (3) and is opened
Base, roll-force are 100~400t/cm2, form roughed bloom；Finish rolling milling train is entered back into, with 150~450t/cm of roll-force2Finish rolling at
Steel-product.
The beneficial effects of the present invention are:
1, raw material sources are extensive, production procedure is short
By resourceful Iron Ore Powder, the iron scale iron scale of hot candied factory (the gas cutting slag of steel construction), iron oxide etc.
As raw material, using the multinomial direct reduced iron patented technology of the present inventor, such as coal base reduction, gas-based reduction or biradical reduction
Non- burnt iron smelting method etc., can restore, handle out good, a large amount of high-quality direct-reduction iron powder；
Isostatic cool pressing, heat-agglomerating and hot extrusion/rolling are passed through using direct-reduction iron powder, obtain steel billet, whole flow process
It is very short, it is truly realized short route smelting iron and steel.
2, small investment, occupied area are small
Traditional smelting iron and steel process is agglomeration for iron mine-coking-blast furnace ironmaking-converter (electric arc furnaces) steel-smelting continuous casting
(ingot casting)-hot rolling-steel-product, that there are equipment investments is big for traditional production technology, occupied area is wide, the various pollutions disadvantages such as again
End；And process of the invention is direct-reduction iron powder-isostatic cool pressing-heat-agglomerating-hot extrusion/rolling-steel-product, tool
There are the advantages such as small investment, process are short, at low cost, occupied area is small.
3, improve and stablize steel quality of item
Melting process is not present in production process of the invention, therefore will not be mixed by brings such as smelting process and deoxidiers
Impurity, and heat-agglomerating carries out in a reducing atmosphere, will not be oxidized, and will not carry out any pollution to material strips；Gu Gu-at
Type technique, ensure that the uniform of steel-product composition at the problems such as composition and metallographic structure segregation, composition segregation will not occur
Property, therefore high quality, the steel product of high-purity can be produced.
4, production run is at low cost
The steel product of hot extrusion and hot rolling, low in cost, production cost is the 60%~80% of tradition steel-making, is
The 40%~60% of casting, therefore the present invention has powerful vitality.
5, injection moulding product application is extensive
The steel-product that the present invention obtains can substitute traditional steel rolling product product, also extrudable component of machine base out
Material after being sawn into segment, can be used for substituting casting motor shell product such as motor shell product；The castings such as production valve body can also be squeezed
Part blank can also squeeze, roll hard alloy, high-speed steel, friction material and antifriction material, non-ferric (coloured) metal machinery zero
The high-quality special steel product such as part and component of machine product.
6, low energy consumption, pollution-free, energy conservation and environmental protection carbon drop
Heating energy source of the invention can use electric energy, natural gas or liquefied gas, the temperature of direct-reduction and heating steel billet
Low, propellant flow is few, nothing or seldom generate NOx and dust, quantity of wastewater effluent it is few；The production of partial melting casting can be substituted
Can, it can also solve the problems, such as a large amount of casting shortage, the present invention has accomplished energy-saving and emission-reduction, carbon drop environmental protection to the maximum extent.
Detailed description of the invention
Fig. 1 is isostatic cool pressing operation chart of the invention；
Fig. 2 is hot extrusion operation chart of the invention；
Fig. 3 is mill operation schematic diagram of the invention；
In figure, 1, cold isostatic mould；2, hydraulic press upper punch；3, hydraulic press bottom punch；4, hot-extrusion mold；5, hydraulic
The hot upper punch of machine；6, hot-extrusion mold die orifice；7, pressure roll；8, roughed bloom；9, planishing roll.
Specific embodiment
The principles and features of the present invention are described below, and the given examples are served only to explain the present invention, is not intended to limit
Determine the scope of the present invention.
Embodiment 1
A method of direct-reduction iron powder being formed into round steel fashioned iron by short route hot extrusion, steps are as follows:
(1) raw material is prepared
Using TFe98.28%, η Fe98.5%, C 0.38%, 5~74 μm of fineness of direct-reduction iron powder 250kg, add
Enter to be reduced directly the polyethanol class wax powder of iron powder weight 0.55%, is limited to 20 μm in wax powder fineness, uniformly mixes 60min, obtain mixed
Material；
(2) isostatic cool pressing steel billet
At -10 DEG C, the mixing of step (1) is added in cold isostatic mould 1, using 3000t hydraulic press, on hydraulic press
Stamping 2 and hydraulic press bottom punch 3 are squeezed respectively from both ends are opposite with isostatic cool pressing, and the pressure that isostatic cool pressing squeezes is
780MPa/cm2；Mixing is pressed into steel billet by cold-extruded, then the steel billet of formation is squeezed out cold isostatic mould by hydraulic press upper punch；?
It is 6.6t/m to density3, 200 × 200 × 945mm or so square billet；
(3) heat-agglomerating
The square billet of step (2) is added in hydrogen reduction heating kiln and carries out heat-agglomerating, control heating temperature is
1150-1200 DEG C, 80min is kept the temperature, hot steel billet is obtained；
(4) hot extrusion is become a useful person
The hot steel billet of step (3) is added in hot-extrusion mold 4, using 3000t hydraulic press, using the hot upper punch of hydraulic press
5 move forwards, and are squeezed with hot isostatic pressing, and the pressure that hot isostatic pressing squeezes is 880MPa/cm2, hot steel billet passes through hot extrusion
Compression mould die orifice 6, squeezing out density is 7.8t/m3, 50 × 16000mm of ￠ or so round steel fashioned iron.
Embodiment 2
A method of direct-reduction iron powder being formed into motor shell product by short route hot extrusion, steps are as follows:
(1) raw material is prepared
Using TFe98.28%, η Fe98.5%, C 0.38%, 5~74 μm of fineness of direct-reduction iron powder 250kg, add
Enter to be reduced directly the polyethanol class wax powder of iron powder weight 0.58%, is limited to 20 μm in wax powder fineness, uniformly mixes 70min, obtain mixed
Material；
(2) isostatic cool pressing steel billet
At 5 DEG C, the mixing of step (1) is added in cold isostatic mould 1, using 3000t hydraulic press, hydraulic press upper mold
Punching 2 and hydraulic press bottom punch 3 are squeezed respectively from both ends are opposite with isostatic cool pressing, and the pressure that isostatic cool pressing squeezes is
820MPa/cm2；Mixing is pressed into steel billet by cold-extruded, then the steel billet of formation is squeezed out cold isostatic mould by hydraulic press upper punch；?
It is 6.7t/m to density3, 200 × 1220mm of ￠ or so round billet；
(3) heat-agglomerating
The round billet of step (2) is added in hydrogen reduction heating kiln and carries out heat-agglomerating, control heating temperature is
1100-1180 DEG C, 70min is kept the temperature, hot steel billet is obtained；
(4) hot extrusion is become a useful person
The hot steel billet of step (3) is added in hot-extrusion mold 4, using 3000t hydraulic press, using the hot upper punch of hydraulic press
5 move forwards, and are squeezed with hot isostatic pressing, and the pressure that hot isostatic pressing squeezes is 950MPa/cm2, hot steel billet passes through hot extrusion
Compression mould die orifice 6, squeezing out density is 7.8t/m3, 200 × 2830mm of ￠ or so motor shell mould special section tubular product, then using electricity
Saw, is cut to every segment length 380mm, as motor shell product.
Embodiment 3
A method of direct-reduction iron powder is rolled to form band steel by short route, steps are as follows:
(1) raw material is prepared
Using TFe98.28%, η Fe98.5%, C 0.38%, 5~74 μm of fineness of direct-reduction iron powder 250kg, add
Enter to be reduced directly the polyethanol class wax powder of iron powder weight 0.6%, is limited to 20 μm in wax powder fineness, uniformly mixes 80min, obtain mixed
Material；
(2) isostatic cool pressing steel billet
At 20 DEG C, the mixing of step (1) is added in cold isostatic mould, using 3000t hydraulic press, hydraulic press upper mold
Punching and hydraulic press bottom punch are squeezed respectively from both ends are opposite with isostatic cool pressing, and the pressure that isostatic cool pressing squeezes is 790MPa/
cm2；Mixing is pressed into steel billet by cold-extruded, then the steel billet of formation is squeezed out cold isostatic mould by hydraulic press upper punch；Obtain density
For 6.6t/m3, 200 × 1220mm of ￠ or so round billet；
(3) heat-agglomerating
The round billet of step (2) is added in hydrogen reduction heating kiln and carries out heat-agglomerating, control heating temperature is
1050-1100 DEG C, 80min is kept the temperature, hot steel billet is obtained；
(4) rolling is become a useful person
￠ 650mm, 200~300t/cm of roll-force is added in the hot steel billet of step (3)2Roughing milling train carry out cogging, then
Using ￠ 200mm, 220~360t/cm of roll-force2Finish rolling mill milling go out theoretical density, 8 × 80mm of section, long 50m or so
Band steel fashioned iron.
Embodiment 4
A method of direct-reduction iron powder is rolled to form steel alloy by short route, steps are as follows:
(1) raw material is prepared
Using TFe98.28%, η Fe98.5%, C 0.38%, 5~74 μm of fineness of direct-reduction iron powder 200kg, add
Enter to be reduced directly the polyethanol class wax powder of iron powder weight 0.6%, is limited to 20 μm in wax powder fineness；Again with addition of direct-reduction iron powder weight
Measure 0.8% manganese powder, 0.6% copper powder, 12% metal nickel powder, 9% hafnium metal powfer and 0.8% graphite
Powder is 325~1000 mesh with addition of powder fineness；Uniformly mixing 80min, obtains mixing；
(2) isostatic cool pressing steel billet
At 35 DEG C, the mixing of step (1) is added in cold isostatic mould 1, using 3000t hydraulic press, on hydraulic press
Stamping 2 and hydraulic press bottom punch 3 are squeezed respectively from both ends are opposite with isostatic cool pressing, and the pressure that isostatic cool pressing squeezes is
850MPa/cm2；Mixing is pressed into steel billet by cold-extruded, then the steel billet of formation is squeezed out cold isostatic mould by hydraulic press upper punch；?
It is 6.6t/m to density3, 180 × 180 × 1150mm or so square billet；
(3) heat-agglomerating
The square billet of step (2) is added in hydrogen reduction heating kiln and carries out heat-agglomerating, control heating temperature is
1180-1220 DEG C, 90min is kept the temperature, hot steel billet is obtained；
(4) rolling is become a useful person
The hot steel billet of step (3) is passed through into ￠ 650mm, 350~380t/cm of roll-force2Pressure roll 7 carry out cogging,
Obtain roughed bloom 8；Using ￠ 580mm, 360~400t/cm of roll-force2Planishing roll 9 roll out theoretical density, section 500 × 50
The steel alloy plate of × 1200mm or so.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (7)
1. a kind of iron powder that will be reduced directly passes through the method that short route hot extrusion/rolling forms profile, which is characterized in that step is such as
Under:
(1) raw material is prepared
Using TFe97-99%, η Fe >=98.5%, C≤0.5%, 5~74 μm of fineness of direct-reduction iron powder, it is added directly also
The plasticizer of former iron powder weight 0.5-0.75% and 0-35% with addition of powder, uniformly mix 30-120min, obtain mixing；
(2) isostatic cool pressing steel billet
At -20~40 DEG C, the mixing of step (1) is added in cold isostatic mould, using under hydraulic press upper punch and hydraulic press
Stamping is squeezed respectively from both ends are opposite with isostatic cool pressing, and the pressure that isostatic cool pressing squeezes is 780-900MPa/cm2；Mixing
Steel billet is pressed by cold-extruded, then the steel billet of formation is squeezed out into cold isostatic mould by hydraulic press upper punch；
(3) heat-agglomerating
The steel billet of step (2) is added in heating kiln and carries out heat-agglomerating, control heating temperature is 1050-1400 DEG C, heat preservation
30-120min obtains hot steel billet；
(4) extruding/rolling is become a useful person
The hot steel billet of step (3) is passed through into hot extrusion or roll forming, steel-product is made.
2. the method according to claim 1, wherein plasticizer described in step (1) is 5-25 μm of fineness, drop
110 DEG C of fusing point of polyethanol class wax powder.
3. the method according to claim 1, wherein described in step (1) with addition of powder be fineness 200-2000
Two or more mixing in purpose metallic silicon power, manganese powder, copper powder, metal nickel powder, hafnium metal powfer or graphite powder.
4. the method according to claim 1, wherein the isostatic cool pressing in step (2) uses 1000~20000t
Press machine；Gained steel billet density is 6.3~7.0t/m3；The round billet or height that gained steel billet is 150~￠ of ￠ 220mm × wide ×
A length of (120~220) × (120~220) × (500~3000) mm square billet.
5. the method according to claim 1, wherein heating kiln described in step (3) is hydrogen reduction
Heating kiln or the heating kiln of inert gas shielding.
6. the method according to claim 1, wherein hot extrusion process described in step (4) are as follows: by step
(3) hot-extrusion mold is added in hot steel billet, is moved forwards using the hot upper punch of hydraulic press, is squeezed with hot isostatic pressing, heat
The pressure that equal static pressure squeeze is 720~980MPa/cm2, hot steel billet is squeezed into steel-product by hot-extrusion mold die orifice.
7. the method according to claim 1, wherein the operation of rolling described in step (4) are as follows: by step (3)
Hot steel billet be added roughing milling train carry out cogging, roll-force be 100~400t/cm2, form roughed bloom；Finish rolling milling train is entered back into,
With 150~450t/cm of roll-force2Finish rolling is at steel-product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811249626.0A CN109530675A (en) | 2018-10-25 | 2018-10-25 | A method of direct-reduction iron powder is formed into profile by short route hot extrusion/rolling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811249626.0A CN109530675A (en) | 2018-10-25 | 2018-10-25 | A method of direct-reduction iron powder is formed into profile by short route hot extrusion/rolling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109530675A true CN109530675A (en) | 2019-03-29 |
Family
ID=65845330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811249626.0A Pending CN109530675A (en) | 2018-10-25 | 2018-10-25 | A method of direct-reduction iron powder is formed into profile by short route hot extrusion/rolling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109530675A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110000386A (en) * | 2019-05-23 | 2019-07-12 | 唐竹胜 | A method of balance weight iron or components blank are prepared using steel scrap thin material |
| CN110629113A (en) * | 2019-10-11 | 2019-12-31 | 武汉桂坤科技有限公司 | Method for directly preparing Fe-6.5% Si silicon steel soft magnetic material strip from ferric oxide by one-step method |
| CN113414386A (en) * | 2021-05-28 | 2021-09-21 | 中南大学 | Method for preparing block alloy by gradient reduction of oxide at low temperature |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1132260A (en) * | 1995-12-05 | 1996-10-02 | 宁夏回族自治区机械研究院 | Method for prodn. of 3-class bearing retainer by use of powdered metal |
| WO1999063120A1 (en) * | 1998-05-29 | 1999-12-09 | Sumitomo Special Metals Co., Ltd. | Method for producing high silicon steel, and silicon steel |
| CN107262731A (en) * | 2017-06-14 | 2017-10-20 | 唐竹胜 | A kind of method that stocking/component of machine product is forged in powdery iron ore DRI hot pressing |
| CN107829036A (en) * | 2017-12-18 | 2018-03-23 | 中南大学 | A kind of powder hot-pressing sintering manufacture method of high silicon steel thin belt material |
| CN107900349A (en) * | 2017-12-18 | 2018-04-13 | 中南大学 | A kind of method that powder hotforging prepares Fe 6.5%Si soft magnetic materials thin strips |
| CN107999757A (en) * | 2017-12-18 | 2018-05-08 | 中南大学 | A kind of method that powder hot-pressing sintering prepares single-phase Fe-6.5%Si silicon steel |
| CN108097965A (en) * | 2017-12-18 | 2018-06-01 | 中南大学 | A kind of powder extruding method for making of high silicon steel thin belt material |
-
2018
- 2018-10-25 CN CN201811249626.0A patent/CN109530675A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1132260A (en) * | 1995-12-05 | 1996-10-02 | 宁夏回族自治区机械研究院 | Method for prodn. of 3-class bearing retainer by use of powdered metal |
| WO1999063120A1 (en) * | 1998-05-29 | 1999-12-09 | Sumitomo Special Metals Co., Ltd. | Method for producing high silicon steel, and silicon steel |
| CN107262731A (en) * | 2017-06-14 | 2017-10-20 | 唐竹胜 | A kind of method that stocking/component of machine product is forged in powdery iron ore DRI hot pressing |
| CN107829036A (en) * | 2017-12-18 | 2018-03-23 | 中南大学 | A kind of powder hot-pressing sintering manufacture method of high silicon steel thin belt material |
| CN107900349A (en) * | 2017-12-18 | 2018-04-13 | 中南大学 | A kind of method that powder hotforging prepares Fe 6.5%Si soft magnetic materials thin strips |
| CN107999757A (en) * | 2017-12-18 | 2018-05-08 | 中南大学 | A kind of method that powder hot-pressing sintering prepares single-phase Fe-6.5%Si silicon steel |
| CN108097965A (en) * | 2017-12-18 | 2018-06-01 | 中南大学 | A kind of powder extruding method for making of high silicon steel thin belt material |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110000386A (en) * | 2019-05-23 | 2019-07-12 | 唐竹胜 | A method of balance weight iron or components blank are prepared using steel scrap thin material |
| CN110629113A (en) * | 2019-10-11 | 2019-12-31 | 武汉桂坤科技有限公司 | Method for directly preparing Fe-6.5% Si silicon steel soft magnetic material strip from ferric oxide by one-step method |
| CN113414386A (en) * | 2021-05-28 | 2021-09-21 | 中南大学 | Method for preparing block alloy by gradient reduction of oxide at low temperature |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106947908B (en) | A kind of method of continuous casting electroslag production 4Cr5MoSiV1 die steels | |
| CN102994692B (en) | Smelting process of high-boron high-speed steel roller material | |
| CN109530675A (en) | A method of direct-reduction iron powder is formed into profile by short route hot extrusion/rolling | |
| CN101905411B (en) | Method for manufacturing coupler for distributor of automobile engine | |
| CN103611925B (en) | The powder metallurgy prescription of all-hydraulic steering gear stator-rotator pair and manufacturing process | |
| CN106834959B (en) | The production method of high hardness wear-resisting ball material steel | |
| CN103572178B (en) | A kind of high temperaturesteel and preparation method thereof | |
| CN103343291B (en) | Method for producing phosphorus weathering resistant steel from limonitic laterite ore | |
| RU2325960C2 (en) | Method of manufacture of commercial products at casting and rolling complex of metallurgical mini plant | |
| CN102489637A (en) | Machining process of ultra-large bearing ferrule blank | |
| CN104911428A (en) | Wear resistant molybdenum alloy plug and preparation method thereof | |
| CN110541115A (en) | Method for manufacturing austenitic stainless steel 150 short-specification continuous casting round pipe blank | |
| CN105886931A (en) | Powder metallurgical tool steel for automobile separation shifting fork | |
| CN110565017A (en) | Steel plate for nuclear power flywheel made of continuous casting and electroslag and smelting method thereof | |
| CN111074166A (en) | Molybdenum-containing high-strength powder metallurgy composite material and preparation method thereof | |
| CN102560241A (en) | Powder metallurgy material | |
| CN102052459B (en) | Powder-metallurgy release yoke and manufacturing method thereof | |
| CN100340364C (en) | Manufacturing method of eccentric axle sleeve | |
| RU53944U1 (en) | CASTING AND ROLLING COMPLEX OF METALLURGICAL MICROFACTORY | |
| CN103320714A (en) | High-temperature-wearing-resisting aluminum-containing alloy steel and preparation method thereof | |
| CN202001520U (en) | Powder metallurgy separation fork | |
| CN108942093A (en) | A kind of economizing type coiler mandrel fanning strip process for manufacturing forging | |
| CN101879598B (en) | Manufacture method of powder alloy self-lubricating bearing for continuous casting crystallizer | |
| CN114653938A (en) | Novel powder metallurgy manufacturing process | |
| Senk | Iron and Steel Metallurgy—Ongoing Challenges |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190329 |
|
| RJ01 | Rejection of invention patent application after publication |