CN105983691A - Powder forging method for forklift synchronizer gear ring - Google Patents
Powder forging method for forklift synchronizer gear ring Download PDFInfo
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- CN105983691A CN105983691A CN201610033204.4A CN201610033204A CN105983691A CN 105983691 A CN105983691 A CN 105983691A CN 201610033204 A CN201610033204 A CN 201610033204A CN 105983691 A CN105983691 A CN 105983691A
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- 238000005242 forging Methods 0.000 title claims abstract description 39
- 239000000843 powder Substances 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 20
- 229910000851 Alloy steel Inorganic materials 0.000 claims abstract description 13
- 238000005245 sintering Methods 0.000 claims abstract description 13
- 238000002156 mixing Methods 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 6
- 238000003825 pressing Methods 0.000 claims abstract description 4
- 239000012298 atmosphere Substances 0.000 claims description 16
- 229910052799 carbon Inorganic materials 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 12
- 238000010792 warming Methods 0.000 claims description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 6
- 229910052804 chromium Inorganic materials 0.000 claims description 6
- 229910052748 manganese Inorganic materials 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 229910052750 molybdenum Inorganic materials 0.000 claims description 6
- 229910052698 phosphorus Inorganic materials 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 229910052717 sulfur Inorganic materials 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000010791 quenching Methods 0.000 claims description 4
- 230000000171 quenching effect Effects 0.000 claims description 4
- 229910000521 B alloy Inorganic materials 0.000 claims description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 3
- 229910052691 Erbium Inorganic materials 0.000 claims description 3
- 229910052688 Gadolinium Inorganic materials 0.000 claims description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 3
- 229910052772 Samarium Inorganic materials 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 229910052769 Ytterbium Inorganic materials 0.000 claims description 3
- 239000012300 argon atmosphere Substances 0.000 claims description 3
- 238000005422 blasting Methods 0.000 claims description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 3
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 229910052758 niobium Inorganic materials 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000005728 strengthening Methods 0.000 claims description 3
- 238000004381 surface treatment Methods 0.000 claims description 3
- 229910052715 tantalum Inorganic materials 0.000 claims description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 3
- 229910052720 vanadium Inorganic materials 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000007669 thermal treatment Methods 0.000 abstract 2
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000001360 synchronised effect Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000004663 powder metallurgy Methods 0.000 description 2
- -1 be incubated 1.5h Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000009497 press forging Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
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
- 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
-
- B22F1/0003—
-
- 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
- B22F3/1003—Use of special medium during sintering, e.g. sintering aid
- B22F3/1007—Atmosphere
- B22F3/101—Changing atmosphere
-
- 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
- B22F3/17—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by forging
-
- 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
- B22F3/24—After-treatment of workpieces or articles
-
- 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
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/08—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of toothed articles, e.g. gear wheels; of cam discs
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- 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
-
- 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
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/248—Thermal after-treatment
-
- 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
- B22F2201/00—Treatment under specific atmosphere
- B22F2201/01—Reducing atmosphere
- B22F2201/013—Hydrogen
-
- 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
- B22F2201/00—Treatment under specific atmosphere
- B22F2201/02—Nitrogen
-
- 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
- B22F2201/00—Treatment under specific atmosphere
- B22F2201/04—CO or CO2
-
- 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
- B22F2201/00—Treatment under specific atmosphere
- B22F2201/10—Inert gases
- B22F2201/11—Argon
-
- 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
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
-
- 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
- B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Heat Treatment Of Articles (AREA)
- Forging (AREA)
Abstract
The invention discloses a powder forging method for a forklift synchronizer gear ring. The powder forging method comprises the steps of batching, mixing, pressing, sintering, forging, thermal treatment, surface stress peening treatment and the like. Alloy steel A and alloy steel B are compounded, and the powder forging technology and the thermal treatment process are adopted, so that a manufactured forklift synchronizer gear ring material has the beneficial effects of being excellent in wear resistance, high in mechanical strength, good in impact toughness and plasticity and the like.
Description
Technical field
The present invention relates to the powder forging process of a kind of fork truck synchro converter ring, belong to power forging technical field.
Background technology
Synchronized is the key component of forklift speed variator, and its operation principle is to utilize a pair conical friction by-product life friction
Power so that the peripheral speed of meshing gear reaches equal and stably enters engagement.Due to gear shift ring gear and the gear being connected
(deceleration) was accelerated to arrive synchronized shifting, so this quick and various friction makes at the screw thread conical surface of synchronized in one or two second
Under severe condition of work, thus the wearability of synchro converter ring material is had higher requirement.
Power forging technology is conventional powder metallurgical technique and precision forging organically combines and grows up one had much
The market competitiveness less, without cutting metal processing method, with metal dust as raw material, through preform compacting, protection gas
Atmosphere carries out heat-agglomerating and as rough forging, then once forging and molding and realize the accurate mould of non-trimming on forcing press
Forging, obtains and common forging part equal densities, complex-shaped net-size forging.Its existing powder metallurgy formation better performances
Advantage, again play forging deformation effectively change metal material tissue and the feature of performance effect, make powder metallurgy and forging
Make technique and achieve new breakthrough on producing, particularly suitable production in enormous quantities high-performance, complex-shaped constitutional detail, because of
This has broad application prospects.
Content of the invention
It is an object of the invention to provide the powder forging process of a kind of fork truck synchro converter ring.
For achieving the above object, the technical solution used in the present invention is as follows:
The powder forging process of a kind of fork truck synchro converter ring, comprises the following steps:
A, dispensing and batch mixing
Weigh A alloy steel powder and B alloy steel powder according to the ratio of mass ratio 3-5:1-2, after accurately weighing grain weight, be placed in mixed
Mixing 15-20min in material machine, to being evenly distributed；
B, compacting
Adding the above-mentioned powder mixing on press and being pressed into synchro converter ring preform, pressing pressure is 5-8t/
cm2；
C, sintering
Above-mentioned prepared synchro converter ring preform is sintered in the sintering furnace be connected with protective atmosphere: first exist
It is warming up to 580-640 DEG C under nitrogen protection atmosphere, be incubated 0.5-1h, then be warming up to 820-880 under carbon-dioxide protecting atmosphere
DEG C, it is incubated 1-2h, then at argon atmosphere borehole cooling to 480-560 DEG C, be incubated 0.5-1h, then under hydrogen shield atmosphere
It is warming up to 900-950 DEG C, is incubated 1-2h, then is warming up to 1080-1160 DEG C at carbon monoxide protective atmosphere, be incubated 2-3h；
D, forging
Synchro converter ring preform after sintering processes is directly sent into die of press in sintering furnace and forges, go out
Stove to forge time is 6-8s, and forging force is 7-9t/cm2, final forging temperature is 870-890 DEG C；
E, heat treatment
Above-mentioned prepared forging is heated to 1020-1060 DEG C, is incubated 1-2h, then is cooled to 870-910 DEG C, be incubated 2-3h, wind
It is heated to 220-260 DEG C after cold quenching, is incubated 6-8h, is again heated to 440-480 DEG C, be incubated 2-4h, with stove air cooling, be again heated to
It 520-570 DEG C, is incubated 1-2h, after water hardening, is heated to 980-1040 DEG C, be incubated 0.5-1h, then be cooled to 680-720 DEG C, protect
Temperature 1-2h, with stove air cooling, is again heated to 380-440 DEG C, is incubated 3-5h, is heated to 245-285 DEG C after oil quenchinng, is incubated 4-
7h, air cooling of coming out of the stove；
F, surface shot blasting strengthening process
Using 0.05mm stainless steel bullet, jet length is 4-5cm, at forging surface treatment 20-under 0.6-0.8MPa pressure
30min。
The chemical composition mass percent of described A steel alloy is: C 0.2-0.5%, Si 0.6-1.2%, Cr 2.1-3.3%,
Mn 1.9-2.6%、Mo 1.2-1.6%、V 0.4-0.8%、Ta 0.3-0.5%、Er 0.04-0.06%、Yb 0.03-0.05%、P
≤ 0.02%, S≤0.01%, balance of Fe and be inevitably mingled with matter.
The chemical composition mass percent of described B steel alloy is: C 1.2-1.8%, Si 0.4-0.8%, W 2.2-3.4%,
Cr 4.4-5.6%、Mo 1.7-2.9%、Al 1.0-1.5%、Mn 0.3-0.6%、Nb 0.2-0.4%、Sm 0.03-0.06%、Gd
0.02-0.04%, P≤the 0.03%th, S≤0.03%, balance of Fe and be inevitably mingled with matter.
Beneficial effects of the present invention:
The present invention passes through the compound of A steel alloy and B steel alloy, and uses power forging technology and Technology for Heating Processing, makes to prepare
Fork truck synchro converter ring material has excellent wearability, has a higher mechanical strength simultaneously, preferable impact flexibility and moulding
The features such as property.And the inventive method is with short production cycle, labour intensity is low, and production efficiency is high, and production cost is low, and forging quality is good.
Detailed description of the invention
The powder forging process of a kind of fork truck synchro converter ring, comprises the following steps:
A, dispensing and batch mixing
Weigh A alloy steel powder and B alloy steel powder according to the ratio of mass ratio 4:1, after accurately weighing grain weight, be placed in batch mixer
Interior mixing 18min, to being evenly distributed；
The chemical composition mass percent of above-mentioned A steel alloy is: C 0.2-0.5%, Si 0.6-1.2%, Cr 2.1-3.3%, Mn
1.9-2.6%、Mo 1.2-1.6%、V 0.4-0.8%、Ta 0.3-0.5%、Er 0.04-0.06%、Yb 0.03-0.05%、P≤
0.02%th, S≤0.01%, balance of Fe and be inevitably mingled with matter；
The chemical composition mass percent of above-mentioned B steel alloy is: C 1.2-1.8%, Si 0.4-0.8%, W 2.2-3.4%, Cr
4.4-5.6%、Mo 1.7-2.9%、Al 1.0-1.5%、Mn 0.3-0.6%、Nb 0.2-0.4%、Sm 0.03-0.06%、Gd
0.02-0.04%, P≤the 0.03%th, S≤0.03%, balance of Fe and be inevitably mingled with matter；
B, compacting
Adding the above-mentioned powder mixing on press and being pressed into synchro converter ring preform, pressing pressure is 6t/cm2；
C, sintering
Above-mentioned prepared synchro converter ring preform is sintered in the sintering furnace be connected with protective atmosphere: first exist
It is warming up to 620 DEG C under nitrogen protection atmosphere, be incubated 0.5h, then under carbon-dioxide protecting atmosphere, be warming up to 860 DEG C, insulation
1.5h, then at argon atmosphere borehole cooling to 530 DEG C, is incubated 0.5h, then is warming up to 920 DEG C under hydrogen shield atmosphere,
Insulation 1h, then it is warming up to 1120 DEG C at carbon monoxide protective atmosphere, it is incubated 2h；
D, forging
Synchro converter ring preform after sintering processes is directly sent into die of press in sintering furnace and forges, go out
Stove to forge time is 7s, and forging force is 8t/cm2, final forging temperature is 880 DEG C；
E, heat treatment
Above-mentioned prepared forging is heated to 1040 DEG C, is incubated 1.5h, then is cooled to 880 DEG C, be incubated 2h, heat after air-blast quenching
It to 250 DEG C, is incubated 7h, is again heated to 460 DEG C, be incubated 3h, with stove air cooling, be again heated to 550 DEG C, be incubated 1.5h, water hardening
After be heated to 1020 DEG C, be incubated 0.5h, then be cooled to 690 DEG C, be incubated 1h, with stove air cooling, be again heated to 420 DEG C, be incubated 4h, oil
It is heated to 265 DEG C after cold quenching, be incubated 6h, air cooling of coming out of the stove；
F, surface shot blasting strengthening process
Using 0.05mm stainless steel bullet, jet length is 5cm, at forging surface treatment 25min under 0.7MPa pressure.
After testing, the Main Mechanical of above-mentioned prepared synchro converter ring material is: hardness 66.2HRC, tensile strength
1058MPa, yield strength 979MPa, impact flexibility 68.2 J/cm2, percentage elongation 12.9%.
Claims (3)
1. the powder forging process of a fork truck synchro converter ring, it is characterised in that comprise the following steps:
A, dispensing and batch mixing
Weigh A alloy steel powder and B alloy steel powder according to the ratio of mass ratio 3-5:1-2, after accurately weighing grain weight, be placed in mixed
Mixing 15-20min in material machine, to being evenly distributed；
B, compacting
Adding the above-mentioned powder mixing on press and being pressed into synchro converter ring preform, pressing pressure is 5-8t/cm2；
C, sintering
Above-mentioned prepared synchro converter ring preform is sintered in the sintering furnace be connected with protective atmosphere: first exist
It is warming up to 580-640 DEG C under nitrogen protection atmosphere, be incubated 0.5-1h, then be warming up to 820-880 under carbon-dioxide protecting atmosphere
DEG C, it is incubated 1-2h, then at argon atmosphere borehole cooling to 480-560 DEG C, be incubated 0.5-1h, then under hydrogen shield atmosphere
It is warming up to 900-950 DEG C, is incubated 1-2h, then is warming up to 1080-1160 DEG C at carbon monoxide protective atmosphere, be incubated 2-3h；
D, forging
Synchro converter ring preform after sintering processes is directly sent into die of press in sintering furnace and forges, go out
Stove to forge time is 6-8s, and forging force is 7-9t/cm2, final forging temperature is 870-890 DEG C；
E, heat treatment
Above-mentioned prepared forging is heated to 1020-1060 DEG C, is incubated 1-2h, then is cooled to 870-910 DEG C, be incubated 2-3h, wind
It is heated to 220-260 DEG C after cold quenching, is incubated 6-8h, is again heated to 440-480 DEG C, be incubated 2-4h, with stove air cooling, be again heated to
It 520-570 DEG C, is incubated 1-2h, after water hardening, is heated to 980-1040 DEG C, be incubated 0.5-1h, then be cooled to 680-720 DEG C, protect
Temperature 1-2h, with stove air cooling, is again heated to 380-440 DEG C, is incubated 3-5h, is heated to 245-285 DEG C after oil quenchinng, is incubated 4-
7h, air cooling of coming out of the stove；
F, surface shot blasting strengthening process
Using 0.05mm stainless steel bullet, jet length is 4-5cm, at forging surface treatment 20-under 0.6-0.8MPa pressure
30min。
2. the powder forging process of fork truck synchro converter ring according to claim 1, it is characterised in that described A steel alloy
Chemical composition mass percent be: C 0.2-0.5%, Si 0.6-1.2%, Cr 2.1-3.3%, Mn 1.9-2.6%, Mo 1.2-
1.6%th, V 0.4-0.8%, Ta 0.3-0.5%, Er 0.04-0.06%, Yb 0.03-0.05%, P≤0.02%, S≤0.01%, remaining
Amount is Fe and is inevitably mingled with matter.
3. the powder forging process of fork truck synchro converter ring according to claim 1, it is characterised in that described B steel alloy
Chemical composition mass percent be: C 1.2-1.8%, Si 0.4-0.8%, W 2.2-3.4%, Cr 4.4-5.6%, Mo 1.7-
2.9%、Al 1.0-1.5%、Mn 0.3-0.6%、Nb 0.2-0.4%、Sm 0.03-0.06%、Gd 0.02-0.04%、P≤
0.03%th, S≤0.03%, balance of Fe and be inevitably mingled with matter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610033204.4A CN105983691A (en) | 2016-01-19 | 2016-01-19 | Powder forging method for forklift synchronizer gear ring |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610033204.4A CN105983691A (en) | 2016-01-19 | 2016-01-19 | Powder forging method for forklift synchronizer gear ring |
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| Publication Number | Publication Date |
|---|---|
| CN105983691A true CN105983691A (en) | 2016-10-05 |
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ID=57040886
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|---|---|---|---|
| CN201610033204.4A Withdrawn CN105983691A (en) | 2016-01-19 | 2016-01-19 | Powder forging method for forklift synchronizer gear ring |
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|---|---|
| CN (1) | CN105983691A (en) |
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| CN107675105A (en) * | 2017-11-24 | 2018-02-09 | 苏州双金实业有限公司 | A kind of stainless steel with superplastic ability |
| CN109702208A (en) * | 2018-12-28 | 2019-05-03 | 江苏智造新材有限公司 | A kind of double clutch automatic speed changing case synchromesh gear hub and its powder metallurgically manufacturing technique |
| CN109848425A (en) * | 2018-12-18 | 2019-06-07 | 江苏智造新材有限公司 | A kind of high-performing car synchronized ring gear novel powder metallurgy production technology |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107675105A (en) * | 2017-11-24 | 2018-02-09 | 苏州双金实业有限公司 | A kind of stainless steel with superplastic ability |
| CN109848425A (en) * | 2018-12-18 | 2019-06-07 | 江苏智造新材有限公司 | A kind of high-performing car synchronized ring gear novel powder metallurgy production technology |
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