CN105935738A - Forging process for ledeburite steel shaft - Google Patents
Forging process for ledeburite steel shaft Download PDFInfo
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- CN105935738A CN105935738A CN201610512270.XA CN201610512270A CN105935738A CN 105935738 A CN105935738 A CN 105935738A CN 201610512270 A CN201610512270 A CN 201610512270A CN 105935738 A CN105935738 A CN 105935738A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/06—Making machine elements axles or shafts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
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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
- C21D1/26—Methods of annealing
- C21D1/28—Normalising
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/28—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for plain shafts
-
- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Forging (AREA)
Abstract
The invention belongs to the technical filed of ledeburite steel shaft machining and relates to a forging process for a ledeburite steel shaft. The process includes the following steps that firstly, a blank is selected and rough-machined, and a shaft blank is obtained; secondly, the shaft blank is put into a heating furnace to be preheated and subjected to heat preservation; thirdly, the preheated shaft is put into the furnace to be subjected to primary heating, then subjected to primary heat preservation and then subjected to upsetting; fourthly, the upset shaft is subjected to secondary heating and then the subjected to secondary heat preservation, then the shaft is drawn out, and the drawing-out ratio ranges from 5 to 7; and fifthly, the drawn-out shaft is subjected to tertiary heating and then subjected to tertiary heat preservation, the shaft is air-cooled to the room temperature after being discharged from the furnace, and normalizing treatment is conducted. The ledeburite steel shaft manufactured through the forging process is small in carbide segregation and uniform in distribution; no crack is generated, and the quality of the product is good; and grains cannot grow up anew, carbide cannot gather, and use performance is good.
Description
Technical field
The invention belongs to ledeburite steel axle processing technique field, particularly relate to the forging of a kind of ledeburite steel axle
Technique.
Background technology
Ledeburite is the one in ferrous materials basic organizational structure, under room temperature be pearlite, cementite and
The mixture of eutectic cementite.The ledeburite steel that common Forging Technology is produced easily occurs that carbide is inclined
Analysis is serious, and distributed pole is uneven；Forging process easily cracks；Crystal grain is grown up and carbide again
Assemble, affect serviceability.
Summary of the invention
The technical problem to be solved is to provide the Forging Technology of a kind of ledeburite steel axle.
For solving the problems referred to above, the Forging Technology of a kind of ledeburite steel axle of the present invention, this technique is
Comprise the steps of:
(1) select blank, blank is carried out roughing, obtains axis blank；
(2) being put in heating furnace by axis blank and preheat, pre-heating temperature is 250～290 DEG C, so
After be incubated, holding temperature is 250～290 DEG C, and temperature retention time is 1.7～2.2 hours；
(3) axle after preheating is put into stove and is once heated, heating-up temperature be 1150～
1230 DEG C, being the most once incubated, holding temperature is 1250～1230 DEG C, and temperature retention time is 5～6 little
Time, liquid alloy generation eutectic transformation forms ledeburite, whole alloy composition be the austenite that first separates out and
Ledeburite, then carries out jumping-up by axle, can not bend during jumping-up, as there is bending, it is necessary to rectify after melting down
The most again jumping-up；
(4) axle after jumping-up carrying out post bake, post bake temperature is 710～750 DEG C, then enters
Row secondary is incubated, and secondary holding temperature is 710～750 DEG C, and secondary temperature retention time is 4～5 hours, then
Axle is placed on lower V-type anvil, then goes up and press under flat anvil, pull out under triaxial pressure, during pulling
Send and want uniformly with drafts as far as possible, diligent upset, it is to avoid same position is subject to hammering repeatedly, pulling than be 5～
7；
(5) axle after pulling being carried out three heating, three times heating-up temperature is 550～650 DEG C, then enters
Three insulations of row, three times holding temperature is 550～650 DEG C, and three times temperature retention time is 2～3 hours, then
Air cooling of coming out of the stove, to room temperature, carries out normalized treatment, eliminates the residualinternal stress after forging.
Compared with prior art, the invention have the advantages that the ledeburite steel axle carbide of the present invention is inclined
Analyse little, and be evenly distributed；The ledeburite steel axle of the present invention will not crack, good product quality；This
Bright ledeburite steel axialite grain will not be grown up again and carbide will not be assembled, and serviceability is good.
Detailed description of the invention
Embodiment 1
A kind of Forging Technology of ledeburite steel axle, this technique is to comprise the steps of:
(1) select blank, blank is carried out roughing, obtains axis blank；
(2) being put in heating furnace by axis blank and preheat, pre-heating temperature is 250 DEG C, then enters
Row insulation, holding temperature is 250 DEG C, and temperature retention time is 1.7 hours；
(3) axle after preheating is put into stove and is once heated, and one time heating-up temperature is 1150 DEG C,
The most once being incubated, holding temperature is 1250 DEG C, and temperature retention time is 5 hours, and liquid alloy occurs
Eutectic transformation forms ledeburite, and whole alloy composition is the austenite and ledeburite first separated out, then by axle
Carry out jumping-up, can not bend during jumping-up, as bending occurs, it is necessary to correct jumping-up again after melting down；
(4) axle after jumping-up carrying out post bake, post bake temperature is 710 DEG C, then carries out two
Secondary insulation, secondary holding temperature is 710 DEG C, and secondary temperature retention time is 4 hours, and then axle is placed on lower V
On swage block, then go up and press under flat anvil, pull out under triaxial pressure, sending as far as possible and depressing during pulling
Amount is wanted uniformly, diligent upset, it is to avoid same position is subject to hammering repeatedly, and pulling ratio is 5；
(5) axle after pulling being carried out three heating, three times heating-up temperature is 550 DEG C, then carries out three
Secondary insulation, three times holding temperature is 550 DEG C, and three times temperature retention time is 2 hours, and air cooling of then coming out of the stove is to room
Temperature, carries out normalized treatment, eliminates the residualinternal stress after forging.
It is demonstrated experimentally that ledeburite steel axle carbide segregation is less under this parameter, and it is evenly distributed；Ledeburite
Steel axle will not crack, good product quality；Ledeburite steel axialite grain will not be grown up with carbide not again
Can assemble, serviceability is preferable.
Embodiment 2
A kind of Forging Technology of ledeburite steel axle, this technique is to comprise the steps of:
(1) select blank, blank is carried out roughing, obtains axis blank；
(2) being put in heating furnace by axis blank and preheat, pre-heating temperature is 260 DEG C, then enters
Row insulation, holding temperature is 260 DEG C, and temperature retention time is 1.9 hours；
(3) axle after preheating is put into stove and is once heated, and one time heating-up temperature is 1170 DEG C,
The most once being incubated, holding temperature is 1170 DEG C, and temperature retention time is 5.3 hours, and liquid alloy is sent out
Raw eutectic transformation forms ledeburite, and whole alloy composition is the austenite and ledeburite first separated out, and then will
Axle carries out jumping-up, can not bend during jumping-up, as there is bending, it is necessary to correct jumping-up again after melting down；
(4) axle after jumping-up carrying out post bake, post bake temperature is 720 DEG C, then carries out two
Secondary insulation, secondary holding temperature is 720 DEG C, and secondary temperature retention time is 4.2 hours, is then placed on down by axle
On V-type anvil, then go up and press under flat anvil, pull out under triaxial pressure, sending as far as possible and pressing during pulling
Lower amount is wanted uniformly, diligent upset, it is to avoid same position is subject to hammering repeatedly, and pulling ratio is 5；
(5) axle after pulling being carried out three heating, three times heating-up temperature is 575 DEG C, then carries out three
Secondary insulation, three times holding temperature is 575 DEG C, and three times temperature retention time is 2.3 hours, then comes out of the stove air cooling extremely
Room temperature, carries out normalized treatment, eliminates the residualinternal stress after forging.
It is demonstrated experimentally that ledeburite steel axle carbide segregation is less under this parameter, and it is evenly distributed；Ledeburite
Steel axle will not crack, and product quality is preferable；Ledeburite steel axialite grain will not be grown up and carbide again
Will not assemble, serviceability is preferable.
Embodiment 3
A kind of Forging Technology of ledeburite steel axle, this technique is to comprise the steps of:
(1) select blank, blank is carried out roughing, obtains axis blank；
(2) being put in heating furnace by axis blank and preheat, pre-heating temperature is 270 DEG C, then enters
Row insulation, holding temperature is 270 DEG C, and temperature retention time is 2 hours；
(3) axle after preheating is put into stove and is once heated, and one time heating-up temperature is 1190 DEG C,
The most once being incubated, holding temperature is 1190 DEG C, and temperature retention time is 5.5 hours, and liquid alloy is sent out
Raw eutectic transformation forms ledeburite, and whole alloy composition is the austenite and ledeburite first separated out, and then will
Axle carries out jumping-up, can not bend during jumping-up, as there is bending, it is necessary to correct jumping-up again after melting down；
(4) axle after jumping-up carrying out post bake, post bake temperature is 730 DEG C, then carries out two
Secondary insulation, secondary holding temperature is 730 DEG C, and secondary temperature retention time is 4.5 hours, is then placed on down by axle
On V-type anvil, then go up and press under flat anvil, pull out under triaxial pressure, sending as far as possible and pressing during pulling
Lower amount is wanted uniformly, diligent upset, it is to avoid same position is subject to hammering repeatedly, and pulling ratio is 6；
(5) axle after pulling being carried out three heating, three times heating-up temperature is 600 DEG C, then carries out three
Secondary insulation, three times holding temperature is 600 DEG C, and three times temperature retention time is 2.5 hours, then comes out of the stove air cooling extremely
Room temperature, carries out normalized treatment, eliminates the residualinternal stress after forging.
It is demonstrated experimentally that ledeburite steel axle carbide segregation is minimum under this parameter, and it is evenly distributed；Ledeburite
Steel axle will not crack, and product quality is best；Ledeburite steel axialite grain will not be grown up and carbide again
Will not assemble, serviceability is best.
Therefore, the present embodiment is preferred embodiment.
Embodiment 4
A kind of Forging Technology of ledeburite steel axle, this technique is to comprise the steps of:
(1) select blank, blank is carried out roughing, obtains axis blank；
(2) being put in heating furnace by axis blank and preheat, pre-heating temperature is 280 DEG C, then enters
Row insulation, holding temperature is 280 DEG C, and temperature retention time is 2.1 hours；
(3) axle after preheating is put into stove and is once heated, and one time heating-up temperature is 1210 DEG C,
The most once being incubated, holding temperature is 1210 DEG C, and temperature retention time is 5.8 hours, and liquid alloy is sent out
Raw eutectic transformation forms ledeburite, and whole alloy composition is the austenite and ledeburite first separated out, and then will
Axle carries out jumping-up, can not bend during jumping-up, as there is bending, it is necessary to correct jumping-up again after melting down；
(4) axle after jumping-up carrying out post bake, post bake temperature is 740 DEG C, then carries out two
Secondary insulation, secondary holding temperature is 740 DEG C, and secondary temperature retention time is 4.8 hours, is then placed on down by axle
On V-type anvil, then go up and press under flat anvil, pull out under triaxial pressure, sending as far as possible and pressing during pulling
Lower amount is wanted uniformly, diligent upset, it is to avoid same position is subject to hammering repeatedly, and pulling ratio is 6；
(5) axle after pulling being carried out three heating, three times heating-up temperature is 625 DEG C, then carries out three
Secondary insulation, three times holding temperature is 625 DEG C, and three times temperature retention time is 2.8 hours, then comes out of the stove air cooling extremely
Room temperature, carries out normalized treatment, eliminates the residualinternal stress after forging.
It is demonstrated experimentally that ledeburite steel axle carbide segregation is minimum under this parameter, and it is evenly distributed；Ledeburite
Steel axle will not crack, and product quality is best；Ledeburite steel axialite grain will not be grown up and carbide again
Will not assemble, serviceability is preferable.
Embodiment 5
A kind of Forging Technology of ledeburite steel axle, this technique is to comprise the steps of:
(1) select blank, blank is carried out roughing, obtains axis blank；
(2) being put in heating furnace by axis blank and preheat, pre-heating temperature is 290 DEG C, then enters
Row insulation, holding temperature is 290 DEG C, and temperature retention time is 2.2 hours；
(3) axle after preheating is put into stove and is once heated, and one time heating-up temperature is 1230 DEG C,
The most once being incubated, holding temperature is 1230 DEG C, and temperature retention time is 6 hours, and liquid alloy occurs
Eutectic transformation forms ledeburite, and whole alloy composition is the austenite and ledeburite first separated out, then by axle
Carry out jumping-up, can not bend during jumping-up, as bending occurs, it is necessary to correct jumping-up again after melting down；
(4) axle after jumping-up carrying out post bake, post bake temperature is 750 DEG C, then carries out two
Secondary insulation, secondary holding temperature is 750 DEG C, and secondary temperature retention time is 5 hours, and then axle is placed on lower V
On swage block, then go up and press under flat anvil, pull out under triaxial pressure, sending as far as possible and depressing during pulling
Amount is wanted uniformly, diligent upset, it is to avoid same position is subject to hammering repeatedly, and pulling ratio is 7；
(5) axle after pulling being carried out three heating, three times heating-up temperature is 650 DEG C, then carries out three
Secondary insulation, three times holding temperature is 650 DEG C, and three times temperature retention time is 3 hours, and air cooling of then coming out of the stove is to room
Temperature, carries out normalized treatment, eliminates the residualinternal stress after forging.
It is demonstrated experimentally that ledeburite steel axle carbide segregation is little under this parameter, and it is evenly distributed；Ledeburite steel
Axle will not crack, good product quality；Ledeburite steel axialite grain will not be grown up again and carbide will not
Assembling, serviceability is preferable.
Claims (6)
1. the Forging Technology of a ledeburite steel axle, it is characterised in that: this technique is to comprise the steps of:
(1) select blank, blank is carried out roughing, obtains axis blank；
(2) being put in heating furnace by axis blank and preheat, pre-heating temperature is 250～290 DEG C, so
After be incubated, holding temperature is 250～290 DEG C, and temperature retention time is 1.7～2.2 hours；
(3) axle after preheating is put into stove and is once heated, heating-up temperature be 1150～
1230 DEG C, being the most once incubated, holding temperature is 1250～1230 DEG C, and temperature retention time is 5～6 little
Time, liquid alloy generation eutectic transformation forms ledeburite, whole alloy composition be the austenite that first separates out and
Ledeburite, then carries out jumping-up by axle, can not bend during jumping-up, as there is bending, it is necessary to rectify after melting down
The most again jumping-up；
(4) axle after jumping-up carrying out post bake, post bake temperature is 710～750 DEG C, then enters
Row secondary is incubated, and secondary holding temperature is 710～750 DEG C, and secondary temperature retention time is 4～5 hours, then
Axle is placed on lower V-type anvil, then goes up and press under flat anvil, pull out under triaxial pressure, during pulling
Send and want uniformly with drafts as far as possible, diligent upset, it is to avoid same position is subject to hammering repeatedly, pulling than be 5～
7；
(5) axle after pulling being carried out three heating, three times heating-up temperature is 550～650 DEG C, then enters
Three insulations of row, three times holding temperature is 550～650 DEG C, and three times temperature retention time is 2～3 hours, then
Air cooling of coming out of the stove, to room temperature, carries out normalized treatment, eliminates the residualinternal stress after forging.
A kind of Forging Technology of ledeburite steel axle, it is characterised in that: this work
Skill is to comprise the steps of:
(1) select blank, blank is carried out roughing, obtains axis blank；
(2) being put in heating furnace by axis blank and preheat, pre-heating temperature is 250 DEG C, then enters
Row insulation, holding temperature is 250 DEG C, and temperature retention time is 1.7 hours；
(3) axle after preheating is put into stove and is once heated, and one time heating-up temperature is 1150 DEG C,
The most once being incubated, holding temperature is 1250 DEG C, and temperature retention time is 5 hours, and liquid alloy occurs
Eutectic transformation forms ledeburite, and whole alloy composition is the austenite and ledeburite first separated out, then by axle
Carry out jumping-up, can not bend during jumping-up, as bending occurs, it is necessary to correct jumping-up again after melting down；
(4) axle after jumping-up carrying out post bake, post bake temperature is 710 DEG C, then carries out two
Secondary insulation, secondary holding temperature is 710 DEG C, and secondary temperature retention time is 4 hours, and then axle is placed on lower V
On swage block, then go up and press under flat anvil, pull out under triaxial pressure, sending as far as possible and depressing during pulling
Amount is wanted uniformly, diligent upset, it is to avoid same position is subject to hammering repeatedly, and pulling ratio is 5；
(5) axle after pulling being carried out three heating, three times heating-up temperature is 550 DEG C, then carries out three
Secondary insulation, three times holding temperature is 550 DEG C, and three times temperature retention time is 2 hours, and air cooling of then coming out of the stove is to room
Temperature, carries out normalized treatment, eliminates the residualinternal stress after forging.
A kind of Forging Technology of ledeburite steel axle, it is characterised in that: this work
Skill is to comprise the steps of:
(1) select blank, blank is carried out roughing, obtains axis blank；
(2) being put in heating furnace by axis blank and preheat, pre-heating temperature is 260 DEG C, then enters
Row insulation, holding temperature is 260 DEG C, and temperature retention time is 1.9 hours；
(3) axle after preheating is put into stove and is once heated, and one time heating-up temperature is 1170 DEG C,
The most once being incubated, holding temperature is 1170 DEG C, and temperature retention time is 5.3 hours, and liquid alloy is sent out
Raw eutectic transformation forms ledeburite, and whole alloy composition is the austenite and ledeburite first separated out, and then will
Axle carries out jumping-up, can not bend during jumping-up, as there is bending, it is necessary to correct jumping-up again after melting down；
(4) axle after jumping-up carrying out post bake, post bake temperature is 720 DEG C, then carries out two
Secondary insulation, secondary holding temperature is 720 DEG C, and secondary temperature retention time is 4.2 hours, is then placed on down by axle
On V-type anvil, then go up and press under flat anvil, pull out under triaxial pressure, sending as far as possible and pressing during pulling
Lower amount is wanted uniformly, diligent upset, it is to avoid same position is subject to hammering repeatedly, and pulling ratio is 5；
(5) axle after pulling being carried out three heating, three times heating-up temperature is 575 DEG C, then carries out three
Secondary insulation, three times holding temperature is 575 DEG C, and three times temperature retention time is 2.3 hours, then comes out of the stove air cooling extremely
Room temperature, carries out normalized treatment, eliminates the residualinternal stress after forging.
A kind of Forging Technology of ledeburite steel axle, it is characterised in that: this work
Skill is to comprise the steps of:
(1) select blank, blank is carried out roughing, obtains axis blank；
(2) being put in heating furnace by axis blank and preheat, pre-heating temperature is 270 DEG C, then enters
Row insulation, holding temperature is 270 DEG C, and temperature retention time is 2 hours；
(3) axle after preheating is put into stove and is once heated, and one time heating-up temperature is 1190 DEG C,
The most once being incubated, holding temperature is 1190 DEG C, and temperature retention time is 5.5 hours, and liquid alloy is sent out
Raw eutectic transformation forms ledeburite, and whole alloy composition is the austenite and ledeburite first separated out, and then will
Axle carries out jumping-up, can not bend during jumping-up, as there is bending, it is necessary to correct jumping-up again after melting down；
(4) axle after jumping-up carrying out post bake, post bake temperature is 730 DEG C, then carries out two
Secondary insulation, secondary holding temperature is 730 DEG C, and secondary temperature retention time is 4.5 hours, is then placed on down by axle
On V-type anvil, then go up and press under flat anvil, pull out under triaxial pressure, sending as far as possible and pressing during pulling
Lower amount is wanted uniformly, diligent upset, it is to avoid same position is subject to hammering repeatedly, and pulling ratio is 6；
(5) axle after pulling being carried out three heating, three times heating-up temperature is 600 DEG C, then carries out three
Secondary insulation, three times holding temperature is 600 DEG C, and three times temperature retention time is 2.5 hours, then comes out of the stove air cooling extremely
Room temperature, carries out normalized treatment, eliminates the residualinternal stress after forging.
A kind of Forging Technology of ledeburite steel axle, it is characterised in that: this work
Skill is to comprise the steps of:
(1) select blank, blank is carried out roughing, obtains axis blank；
(2) being put in heating furnace by axis blank and preheat, pre-heating temperature is 280 DEG C, then enters
Row insulation, holding temperature is 280 DEG C, and temperature retention time is 2.1 hours；
(3) axle after preheating is put into stove and is once heated, and one time heating-up temperature is 1210 DEG C,
The most once being incubated, holding temperature is 1210 DEG C, and temperature retention time is 5.8 hours, and liquid alloy is sent out
Raw eutectic transformation forms ledeburite, and whole alloy composition is the austenite and ledeburite first separated out, and then will
Axle carries out jumping-up, can not bend during jumping-up, as there is bending, it is necessary to correct jumping-up again after melting down；
(4) axle after jumping-up carrying out post bake, post bake temperature is 740 DEG C, then carries out two
Secondary insulation, secondary holding temperature is 740 DEG C, and secondary temperature retention time is 4.8 hours, is then placed on down by axle
On V-type anvil, then go up and press under flat anvil, pull out under triaxial pressure, sending as far as possible and pressing during pulling
Lower amount is wanted uniformly, diligent upset, it is to avoid same position is subject to hammering repeatedly, and pulling ratio is 6；
(5) axle after pulling being carried out three heating, three times heating-up temperature is 625 DEG C, then carries out three
Secondary insulation, three times holding temperature is 625 DEG C, and three times temperature retention time is 2.8 hours, then comes out of the stove air cooling extremely
Room temperature, carries out normalized treatment, eliminates the residualinternal stress after forging.
A kind of Forging Technology of ledeburite steel axle, it is characterised in that: this work
Skill is to comprise the steps of:
(1) select blank, blank is carried out roughing, obtains axis blank；
(2) being put in heating furnace by axis blank and preheat, pre-heating temperature is 290 DEG C, then enters
Row insulation, holding temperature is 290 DEG C, and temperature retention time is 2.2 hours；
(3) axle after preheating is put into stove and is once heated, and one time heating-up temperature is 1230 DEG C,
The most once being incubated, holding temperature is 1230 DEG C, and temperature retention time is 6 hours, and liquid alloy occurs
Eutectic transformation forms ledeburite, and whole alloy composition is the austenite and ledeburite first separated out, then by axle
Carry out jumping-up, can not bend during jumping-up, as bending occurs, it is necessary to correct jumping-up again after melting down；
(4) axle after jumping-up carrying out post bake, post bake temperature is 750 DEG C, then carries out two
Secondary insulation, secondary holding temperature is 750 DEG C, and secondary temperature retention time is 5 hours, and then axle is placed on lower V
On swage block, then go up and press under flat anvil, pull out under triaxial pressure, sending as far as possible and depressing during pulling
Amount is wanted uniformly, diligent upset, it is to avoid same position is subject to hammering repeatedly, and pulling ratio is 7；
(5) axle after pulling being carried out three heating, three times heating-up temperature is 650 DEG C, then carries out three
Secondary insulation, three times holding temperature is 650 DEG C, and three times temperature retention time is 3 hours, and air cooling of then coming out of the stove is to room
Temperature, carries out normalized treatment, eliminates the residualinternal stress after forging.
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| CN201610512270.XA CN105935738B (en) | 2016-06-30 | 2016-06-30 | A kind of forging technology of ledeburite steel shaft |
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| CN201610512270.XA CN105935738B (en) | 2016-06-30 | 2016-06-30 | A kind of forging technology of ledeburite steel shaft |
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| CN105935738A true CN105935738A (en) | 2016-09-14 |
| CN105935738B CN105935738B (en) | 2017-12-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111347220A (en) * | 2018-12-24 | 2020-06-30 | 溧阳市金昆锻压有限公司 | Manufacturing method of ledeburite steel high-wear-resistance press roll shell |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB766115A (en) * | 1954-04-13 | 1957-01-16 | Eaton Axles Ltd | Improvements in or relating to the manufacture of axle shafts |
| DE2503138A1 (en) * | 1974-02-01 | 1975-08-07 | Schoeller Bleckmann Stahlwerke | PROCESS FOR THE MANUFACTURING OF DISKS FROM STEELS PREPARED TO SEAG |
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| GB766115A (en) * | 1954-04-13 | 1957-01-16 | Eaton Axles Ltd | Improvements in or relating to the manufacture of axle shafts |
| DE2503138A1 (en) * | 1974-02-01 | 1975-08-07 | Schoeller Bleckmann Stahlwerke | PROCESS FOR THE MANUFACTURING OF DISKS FROM STEELS PREPARED TO SEAG |
| JPS594936A (en) * | 1982-07-01 | 1984-01-11 | Musashi Seimitsu Kogyo Kk | Manufacture of crank shaft |
| KR20090061404A (en) * | 2007-12-11 | 2009-06-16 | 현대자동차주식회사 | Heat treatment for ultra fine grained steel for transmission shaft |
| CN102091751A (en) * | 2010-12-03 | 2011-06-15 | 太原科技大学 | Control method for 316 LN steel heavy-forging forging crystalline grain |
| CN103492099A (en) * | 2011-04-25 | 2014-01-01 | 日立金属株式会社 | Fabrication method for stepped forged material |
| CN103350180A (en) * | 2013-06-21 | 2013-10-16 | 贵州安大航空锻造有限责任公司 | Forging forming method of fan shaft made of C250 maraging steel |
| CN104907470A (en) * | 2015-04-27 | 2015-09-16 | 上海宏钢电站设备铸锻有限公司 | 13Cr9Mo2Co1NiVNbNB steel forged piece manufacturing method |
| CN105088094A (en) * | 2015-08-11 | 2015-11-25 | 宝钢特钢有限公司 | Manufacturing method of nitrogen-controlled austenitic stainless steel large forging piece |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111347220A (en) * | 2018-12-24 | 2020-06-30 | 溧阳市金昆锻压有限公司 | Manufacturing method of ledeburite steel high-wear-resistance press roll shell |
| CN111347220B (en) * | 2018-12-24 | 2021-09-03 | 溧阳市金昆锻压有限公司 | Manufacturing method of ledeburite steel high-wear-resistance press roll shell |
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