CN105234341A - Powder forging method of forklift knuckle - Google Patents
Powder forging method of forklift knuckle Download PDFInfo
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- CN105234341A CN105234341A CN201510684637.1A CN201510684637A CN105234341A CN 105234341 A CN105234341 A CN 105234341A CN 201510684637 A CN201510684637 A CN 201510684637A CN 105234341 A CN105234341 A CN 105234341A
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Abstract
The invention discloses a powder forging method of a forklift knuckle. The powder forging method comprises the steps of burdening, mixing, pressing, sintering, forging, thermal treatment, surface shot peening treatment and the like. The knuckle manufactured through the powder forging technology has higher tensile strength and yield strength, and good tenacity and plasticity are achieved. Heat resistance and abrasion resistance are achieved. The tensile strength of the knuckle is larger than or equal to 1,050 MPa, the yield strength is larger than or equal to 920 MPa, the impact toughness is larger than or equal to 88 J/cm<2>, the elongation is larger than or equal to 11%, and the requirement for the performance of the forklift knuckle can be completely met. Meanwhile, the method has the beneficial effects that the forming performance is high, the precision of forge pieces is high, the material utilization rate and the production efficiency are high, and the production cost is low; and the method is suitable for industrial large-scale production.
Description
Technical field
The present invention relates to a kind of powder forging process of forklift steering knuckle, belong to power forging technical field.
Background technology
Forklift steering knuckle is the crucial connector between fork truck front axle and front-wheel, the bending force that fork truck swings up and down in the process of moving should be born, the reaction force on ground, twisting resistance when turning to, also to bear impulsive force during fork truck brake, so require that it had both had certain tensile strength and yield strength, also higher toughness and plasticity to be had.
It is large that traditional common Forging Technology and machining process also exist forging fire consumption, combustion gas power consumption is large, forging time is long, forging efficiency is low, staff labor intensity is large, the shortcomings such as forging low precision, have been difficult to the requirement of satisfied current forklift steering knuckle high-quality, high-performance, high efficiency, high accuracy, low consumption, low cost.
Power forging technology be conventional powder metallurgical technique and precision forging one of organically combining and growing up have much the market competitiveness less, without cutting metal processing method; take metal dust as raw material; suppress through preform; heat-agglomerating is carried out and as rough forging in protective atmosphere; then once forging and molding and realize non-trimming precision die forging on forcing press, obtains and common forging part equal densities, complex-shaped net-size forging.The advantage of its existing powder metallurgy formation better performances, play again the feature that forging deformation changes metal material tissue and performance effect effectively, powder metallurgy and Forging Technology is made to achieve new breakthrough in production, be suitable for especially producing high-performance, complex-shaped constitutional detail in enormous quantities, therefore have broad application prospects.
Summary of the invention
The object of the present invention is to provide a kind of powder forging process of forklift steering knuckle.
For achieving the above object, the technical solution used in the present invention is as follows:
A powder forging process for forklift steering knuckle, comprises the following steps:
A, batching and batch mixing
Taking 20CrNi2Mo alloy steel powder, 20MnTiB alloy steel powder and tungsten-carbide powder according to the ratio of mass ratio 6-9:2-4:1, after accurately taking grain weight, being placed in mixing 15-25min in batch mixer, to being evenly distributed;
B, compacting
Added on press by the above-mentioned powder mixed and be pressed into knuckle preform, pressing pressure is 3-5t/cm
2;
C, sintering
Above-mentioned obtained knuckle preform is carried out sintering processes in the sintering furnace being connected with protective atmosphere: first under hydrogen shield atmosphere, be warming up to 1020-1080 DEG C, insulation 1.5-2.5h, be cooled to 840-940 DEG C under vacuum conditions again, insulation 1-2h, then under carbon monoxide protective atmosphere, 1140-1220 DEG C is warming up to, insulation 2-3h, finally at argon atmosphere borehole cooling to 960-1020 DEG C, insulation 1-2h;
D, forging
Sent into die of press in sintering furnace immediately by knuckle preform after sintering processes and forge, coming out of the stove to forge time is 2-3s, and forging force is 4-6t/cm
2, final forging temperature is 850-890 DEG C;
E, heat treatment
Above-mentioned obtained forging is heated to 940-980 DEG C, and insulation 1-2h, is heated to 280-340 DEG C after brine hardening, insulation 3-5h, with stove air cooling, and then be heated to 780-860 DEG C, insulation 1-2h, 220-260 DEG C is heated to, insulation 4-7h, air cooling of coming out of the stove after air-blast quenching;
F, surface shot blasting strengthening process
Adopt 0.05mm stainless steel bullet, jet length is 4-5cm, at forging surface treatment 30-40min under 0.2-0.4MPa pressure.
The chemical composition mass percent of described 20CrNi2Mo steel alloy is: C0.19-0.22%, Si0.25-0.35%, Mn0.5-0.7%, Cr0.4-0.6%, Mo0.2-0.3%, Cu0.01-0.02%, P≤0.03%, S≤0.02%, surplus are Fe and are inevitably mingled with matter.
The chemical composition mass percent of described 20MnTiB steel alloy is: C0.21-0.23%, Mn1.4-1.6%, Si0.25-0.35%, Ti0.06-0.09%, Cr0.1-0.2%, Ni0.05-0.1%, Mo0.03-0.06%, P≤0.01%, S≤0.005%, surplus are Fe and are inevitably mingled with matter.
Beneficial effect of the present invention:
The knuckle that the present invention adopts power forging technology to obtain has higher tensile strength and yield strength, good toughness and plasticity, and shock-resistant, wear-resistant, its hardness>=55HRC, tensile strength>=1050MPa, yield strength>=920MPa, impact flexibility>=88J/cm
2, percentage elongation>=11%, meets the performance requirement of forklift steering knuckle completely, and the inventive method has the advantages such as forming property is high, forging precision is high, stock utilization is high, production efficiency is high, production cost is low simultaneously, is applicable to industrial scale and produces.
Detailed description of the invention
A powder forging process for forklift steering knuckle, comprises the following steps:
A, batching and batch mixing
Taking 20CrNi2Mo alloy steel powder, 20MnTiB alloy steel powder and tungsten-carbide powder according to the ratio of mass ratio 7:3:1, after accurately taking grain weight, being placed in mixing 20min in batch mixer, to being evenly distributed;
The chemical composition mass percent of above-mentioned 20CrNi2Mo steel alloy is: C0.19-0.22%, Si0.25-0.35%, Mn0.5-0.7%, Cr0.4-0.6%, Mo0.2-0.3%, Cu0.01-0.02%, P≤0.03%, S≤0.02%, surplus are Fe and are inevitably mingled with matter;
The chemical composition mass percent of above-mentioned 20MnTiB steel alloy is: C0.21-0.23%, Mn1.4-1.6%, Si0.25-0.35%, Ti0.06-0.09%, Cr0.1-0.2%, Ni0.05-0.1%, Mo0.03-0.06%, P≤0.01%, S≤0.005%, surplus are Fe and are inevitably mingled with matter;
B, compacting
Added on press by the above-mentioned powder mixed and be pressed into knuckle preform, pressing pressure is 4t/cm
2;
C, sintering
Above-mentioned obtained knuckle preform is carried out sintering processes in the sintering furnace being connected with protective atmosphere: first under hydrogen shield atmosphere, be warming up to 1060 DEG C, insulation 2h, be cooled to 880 DEG C under vacuum conditions again, insulation 1h, then under carbon monoxide protective atmosphere, 1170 DEG C are warming up to, insulation 2.5h, finally at argon atmosphere borehole cooling to 990 DEG C, insulation 1.5h;
D, forging
Sent into die of press in sintering furnace immediately by knuckle preform after sintering processes and forge, coming out of the stove to forge time is 2s, and forging force is 5t/cm
2, final forging temperature is 870 DEG C;
E, heat treatment
Above-mentioned obtained forging is heated to 960 DEG C, and insulation 1.5h, is heated to 300 DEG C after brine hardening, and insulation 4h, with stove air cooling, and then is heated to 820 DEG C, and insulation 1h, is heated to 240 DEG C after air-blast quenching, insulation 5h, air cooling of coming out of the stove;
F, surface shot blasting strengthening process
Adopt 0.05mm stainless steel bullet, jet length is 4cm, at forging surface treatment 35min under 0.3MPa pressure.
After testing, the Main Mechanical of above-mentioned obtained knuckle material is: hardness 56.4HRC, tensile strength 1160MPa, yield strength 945MPa, impact flexibility 94.2J/cm
2, percentage elongation 12.8%.
Claims (3)
1. a powder forging process for forklift steering knuckle, is characterized in that, comprises the following steps:
A, batching and batch mixing
Taking 20CrNi2Mo alloy steel powder, 20MnTiB alloy steel powder and tungsten-carbide powder according to the ratio of mass ratio 6-9:2-4:1, after accurately taking grain weight, being placed in mixing 15-25min in batch mixer, to being evenly distributed;
B, compacting
Added on press by the above-mentioned powder mixed and be pressed into knuckle preform, pressing pressure is 3-5t/cm
2;
C, sintering
Above-mentioned obtained knuckle preform is carried out sintering processes in the sintering furnace being connected with protective atmosphere: first under hydrogen shield atmosphere, be warming up to 1020-1080 DEG C, insulation 1.5-2.5h, be cooled to 840-940 DEG C under vacuum conditions again, insulation 1-2h, then under carbon monoxide protective atmosphere, 1140-1220 DEG C is warming up to, insulation 2-3h, finally at argon atmosphere borehole cooling to 960-1020 DEG C, insulation 1-2h;
D, forging
Sent into die of press in sintering furnace immediately by knuckle preform after sintering processes and forge, coming out of the stove to forge time is 2-3s, and forging force is 4-6t/cm
2, final forging temperature is 850-890 DEG C;
E, heat treatment
Above-mentioned obtained forging is heated to 940-980 DEG C, and insulation 1-2h, is heated to 280-340 DEG C after brine hardening, insulation 3-5h, with stove air cooling, and then be heated to 780-860 DEG C, insulation 1-2h, 220-260 DEG C is heated to, insulation 4-7h, air cooling of coming out of the stove after air-blast quenching;
F, surface shot blasting strengthening process
Adopt 0.05mm stainless steel bullet, jet length is 4-5cm, at forging surface treatment 30-40min under 0.2-0.4MPa pressure.
2. the powder forging process of forklift steering knuckle according to claim 1, it is characterized in that, the chemical composition mass percent of described 20CrNi2Mo steel alloy is: C0.19-0.22%, Si0.25-0.35%, Mn0.5-0.7%, Cr0.4-0.6%, Mo0.2-0.3%, Cu0.01-0.02%, P≤0.03%, S≤0.02%, surplus are Fe and are inevitably mingled with matter.
3. the powder forging process of forklift steering knuckle according to claim 1, it is characterized in that, the chemical composition mass percent of described 20MnTiB steel alloy is: C0.21-0.23%, Mn1.4-1.6%, Si0.25-0.35%, Ti0.06-0.09%, Cr0.1-0.2%, Ni0.05-0.1%, Mo0.03-0.06%, P≤0.01%, S≤0.005%, surplus are Fe and are inevitably mingled with matter.
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| CN201510684637.1A CN105234341A (en) | 2015-10-22 | 2015-10-22 | Powder forging method of forklift knuckle |
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| CN201510684637.1A CN105234341A (en) | 2015-10-22 | 2015-10-22 | Powder forging method of forklift knuckle |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105983698A (en) * | 2016-01-19 | 2016-10-05 | 安徽蓝博旺机械集团液压流体机械有限责任公司 | Powder forging method for forklift hub bearing |
| CN105983701A (en) * | 2016-01-19 | 2016-10-05 | 安徽蓝博旺机械集团精密液压件有限责任公司 | Powder forging method for forklift engine camshaft |
| CN105983699A (en) * | 2016-01-19 | 2016-10-05 | 安徽蓝博旺机械集团液压流体机械有限责任公司 | Powder forging method for forklift shock absorber piston rod |
| CN105983691A (en) * | 2016-01-19 | 2016-10-05 | 安徽蓝博旺机械集团振邺机械有限公司 | Powder forging method for forklift synchronizer gear ring |
| CN105983692A (en) * | 2016-01-19 | 2016-10-05 | 安徽蓝博旺机械集团振邺机械有限公司 | Powder forging method for forklift water pump shell |
| CN105983702A (en) * | 2016-01-19 | 2016-10-05 | 安徽蓝博旺机械集团精密液压件有限责任公司 | Powder forging method for forklift engine connecting rod |
| CN105983693A (en) * | 2016-01-19 | 2016-10-05 | 安徽蓝博旺机械集团精密液压件有限责任公司 | Powder forging method for extending and retracting sleeve of forklift transmission shaft |
| CN110977357A (en) * | 2019-12-25 | 2020-04-10 | 台州浩尔工业有限公司 | Bell-shaped shell for universal joint and processing technology |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60155601A (en) * | 1984-01-24 | 1985-08-15 | Toyota Motor Corp | Sintering and forging method |
| CN1325775A (en) * | 2000-05-29 | 2001-12-12 | 上海大学 | Sinter-cloudburst-hot forge technology for powder material |
| CN1442257A (en) * | 2002-02-28 | 2003-09-17 | 日立优喜雅汽车配件有限公司 | Manufacturing method of high density iron base forging part |
| US20080034830A1 (en) * | 2006-08-14 | 2008-02-14 | Tidwell Charles S | Systems and Methods for Reducing Metal Fatigue in Forged Parts |
| KR20120131569A (en) * | 2011-05-26 | 2012-12-05 | (주)씬터온 | Manufacturing method of high strength connecting rod for High pressure combustion engine |
| CN102909378A (en) * | 2012-10-30 | 2013-02-06 | 南通金巨霸机械有限公司 | Powder hot-forging process |
| CN103894613A (en) * | 2012-12-28 | 2014-07-02 | 大连瓦特重机床有限公司 | Powder forging process of connecting rods |
| CN104128607A (en) * | 2014-07-21 | 2014-11-05 | 玉溪大红山矿业有限公司 | Manufacturing technology of vehicle connecting rod |
| CN104889407A (en) * | 2014-03-03 | 2015-09-09 | 现代自动车株式会社 | Method of manufacturing connecting rod by using semi-closed sinter forging |
-
2015
- 2015-10-22 CN CN201510684637.1A patent/CN105234341A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60155601A (en) * | 1984-01-24 | 1985-08-15 | Toyota Motor Corp | Sintering and forging method |
| CN1325775A (en) * | 2000-05-29 | 2001-12-12 | 上海大学 | Sinter-cloudburst-hot forge technology for powder material |
| CN1442257A (en) * | 2002-02-28 | 2003-09-17 | 日立优喜雅汽车配件有限公司 | Manufacturing method of high density iron base forging part |
| US20080034830A1 (en) * | 2006-08-14 | 2008-02-14 | Tidwell Charles S | Systems and Methods for Reducing Metal Fatigue in Forged Parts |
| KR20120131569A (en) * | 2011-05-26 | 2012-12-05 | (주)씬터온 | Manufacturing method of high strength connecting rod for High pressure combustion engine |
| CN102909378A (en) * | 2012-10-30 | 2013-02-06 | 南通金巨霸机械有限公司 | Powder hot-forging process |
| CN103894613A (en) * | 2012-12-28 | 2014-07-02 | 大连瓦特重机床有限公司 | Powder forging process of connecting rods |
| CN104889407A (en) * | 2014-03-03 | 2015-09-09 | 现代自动车株式会社 | Method of manufacturing connecting rod by using semi-closed sinter forging |
| KR20150103573A (en) * | 2014-03-03 | 2015-09-11 | 현대자동차주식회사 | Method of manufacturing connecting rod using the semi-closed sinter forging |
| CN104128607A (en) * | 2014-07-21 | 2014-11-05 | 玉溪大红山矿业有限公司 | Manufacturing technology of vehicle connecting rod |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105983698A (en) * | 2016-01-19 | 2016-10-05 | 安徽蓝博旺机械集团液压流体机械有限责任公司 | Powder forging method for forklift hub bearing |
| CN105983701A (en) * | 2016-01-19 | 2016-10-05 | 安徽蓝博旺机械集团精密液压件有限责任公司 | Powder forging method for forklift engine camshaft |
| CN105983699A (en) * | 2016-01-19 | 2016-10-05 | 安徽蓝博旺机械集团液压流体机械有限责任公司 | Powder forging method for forklift shock absorber piston rod |
| CN105983691A (en) * | 2016-01-19 | 2016-10-05 | 安徽蓝博旺机械集团振邺机械有限公司 | Powder forging method for forklift synchronizer gear ring |
| CN105983692A (en) * | 2016-01-19 | 2016-10-05 | 安徽蓝博旺机械集团振邺机械有限公司 | Powder forging method for forklift water pump shell |
| CN105983702A (en) * | 2016-01-19 | 2016-10-05 | 安徽蓝博旺机械集团精密液压件有限责任公司 | Powder forging method for forklift engine connecting rod |
| CN105983693A (en) * | 2016-01-19 | 2016-10-05 | 安徽蓝博旺机械集团精密液压件有限责任公司 | Powder forging method for extending and retracting sleeve of forklift transmission shaft |
| CN110977357A (en) * | 2019-12-25 | 2020-04-10 | 台州浩尔工业有限公司 | Bell-shaped shell for universal joint and processing technology |
| CN110977357B (en) * | 2019-12-25 | 2020-09-04 | 台州浩尔工业有限公司 | Bell-shaped shell for universal joint and processing technology |
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Application publication date: 20160113 |