CN102994882A - Preparation method of powder metallurgy flange - Google Patents
Preparation method of powder metallurgy flange Download PDFInfo
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- CN102994882A CN102994882A CN2012104945468A CN201210494546A CN102994882A CN 102994882 A CN102994882 A CN 102994882A CN 2012104945468 A CN2012104945468 A CN 2012104945468A CN 201210494546 A CN201210494546 A CN 201210494546A CN 102994882 A CN102994882 A CN 102994882A
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Abstract
The invention relates to a preparation method of a powder metallurgy flange. The powder metallurgy flange comprises the following components in percentage by weight: 0.5-1.5% of copper, 0.3-0.5% of chromium, 0.3-0.5% of silicon, 0.5-0.8% of graphite, 0.3-0.8% of manganese, 0.8-1.0% of zinc stearate, 0.5-1.0% of ferrophosphorus powder, and the balance of iron. The preparation method comprises the technical processes such as mixing, pressing, sintering, tempering, refining and the like. According to different needs, the material components are adjusted, so that the produced flange has high tensile strength and gas tightness, a uniform organization structure, and is extensively applied to various environments.
Description
Technical field
The invention belongs to field of powder metallurgy, refer to especially a kind of powder metallurgy flange preparation method.
Background technology
Existing most flange adopts casting technique production, only have the flange of small part to adopt mechanical workout to form, and the program of mechanical workout is complicated.
There is following defective in the flange of casting in processing with in using, and its tensile strength of iron alloy of casting usefulness is lower than steel, and the alloy internal organizational structure is loose, resistance to air loss is not high, in use occurs easily fracture when the pressure that bears or external force are excessive; On the other hand, the flange of casting has sand holes and pore, can not under high pressure use, and produces otherwise have to leak.
Adopt steel to produce flange, need multiple working procedure just can finish, and have a large amount of waste materials to produce, production efficiency is low, is unfavorable for reducing production costs.
Summary of the invention
The objective of the invention is to adopt powder metallurgy technology to produce flange, and difference as required, the composition of material is adjusted, its tensile strength of the flange of production, the high weave construction of resistance to air loss are even, extensively are adapted to each environment.
The present invention is achieved by the following technical solutions:
A kind of powder metallurgy flange preparation method is:
Batching is selected by weight percentage to include, the manganese of the silicon of the copper of 0.5-1.5%, the chromium of 0.3-0.5%, 0.3-0.5%, the graphite of 0.5-0.8%, 0.3-0.8%, the Zinic stearas of 0.8-1.0%, the ferrophosphorus powder of 0.5-1.0%, and surplus is iron; And select or with above-mentioned each form and to be processed into powder, optimal selection is no more than 100 microns for the particle diameter of each powder; To in mixer, mix 30-60 minute through above-mentioned each powder that calculates;
Compacting is to suppress under the 550-600MPa pressure 10-30 second mixed powder at pressure, makes pressed compact;
Sintering, with pressed compact at 1100-1150 ℃ of lower sintering, after be cooled to 130-150 ℃;
Tempering is warming up to 180-200 ℃ with above-mentioned cooled blank in tempering stove, and insulation was processed after 1-3 hour;
Refining, the size on demand of the blank after the tempering is made with extra care processing, then carry out post-processed and obtain finished product.
Described sintering is sintering stage by stage, at first carries out presintering under 650-900 ℃, and insulation 1-3 hour, and band heat suppresses and shaping under 160-180MPa pressure, to improve the density of structure; And then 1100-1150 ℃ of then cooling in lower sintering 2-4 hour; Described cooling comprises two stages, and first stage is temperature-fall period at the uniform velocity, and cooling rate is no more than 5 ℃/minute to 650-700 ℃; Then carry out the subordinate phase cooling, described subordinate phase cooling selects water cooling to be cooled to 130-150 ℃.
The temperature of described water coolant remains on 75-85 ℃.
The content of phosphorus is 5% by weight percentage in the described ferrophosphorus powder.
The beneficial effect that the present invention compares with prior art is:
By the flange that the technical program makes, its tensile strength, the high weave construction of resistance to air loss are even, extensively are adapted to each environment.
Embodiment
Below describe technical scheme of the present invention in detail by specific embodiment, should be understood that each following embodiment only can be used for explaining the present invention and can not be interpreted as to be limitation of the present invention.
Described preparation method is:
Batching is selected by weight percentage to include, the manganese of the silicon of the copper of 0.5-1.5%, the chromium of 0.3-0.5%, 0.3-0.5%, the graphite of 0.5-0.8%, 0.3-0.8%, the Zinic stearas of 0.8-1.0%, the ferrophosphorus powder of 0.5-1.0%, and surplus is iron; And select or with above-mentioned each form and to be processed into powder, optimal selection is no more than 100 microns for the particle diameter of each powder; To in mixer, mix 30-60 minute through above-mentioned each powder that calculates;
Compacting is to suppress under the 550-600MPa pressure 10-30 second mixed powder at pressure, makes pressed compact;
Sintering, with pressed compact at 1100-1150 ℃ of lower sintering, after be cooled to 130-150 ℃;
Tempering is warming up to 180-200 ℃ with above-mentioned cooled blank in tempering stove, and insulation was processed after 1-3 hour;
Refining, the size on demand of the blank after the tempering is made with extra care processing, then carry out post-processed and obtain finished product.
Described sintering is sintering stage by stage, at first carries out presintering under 650-900 ℃, and insulation 1-3 hour, and band heat suppresses and shaping under 160-180MPa pressure, to improve the density of structure; And then 1100-1150 ℃ of then cooling in lower sintering 2-4 hour; Described cooling comprises two stages, and first stage is temperature-fall period at the uniform velocity, and cooling rate is no more than 5 ℃/minute to 650-700 ℃; Then carry out the subordinate phase cooling, described subordinate phase cooling selects water cooling to be cooled to 130-150 ℃.
The temperature of described water coolant remains on 75-85 ℃.
The content of phosphorus is 5% by weight percentage in the described ferrophosphorus powder.
Embodiment 1
Described preparation method is:
Batching is selected by weight percentage to include, 0.5% copper, 0.3% chromium, 0.3% silicon, 0.5% graphite, 0.3% manganese, 0.8% Zinic stearas, 0.5% ferrophosphorus powder, and surplus is iron; Wherein the content of phosphorus is 5% by weight percentage in the ferrophosphorus powder; And select or with above-mentioned each form and to be processed into powder, be to be Powdered by the outsourcing material in the present embodiment; Optimal selection is no more than 100 microns for the particle diameter of each powder; To in mixer, mix 30 minutes through above-mentioned each powder that calculates;
Compacting is to suppress 30 seconds under the 550MPa pressure mixed powder at pressure, makes pressed compact;
Sintering, with pressed compact at 1100-1150 ℃ of lower sintering, after be cooled to 130-150 ℃; Sintering is sintering stage by stage, at first carry out presintering under 650-900 ℃, and be incubated 2 hours, and band heat suppresses and shaping under 160MPa pressure, to improve the density of structure; And then 1100-1150 ℃ of lower sintering then cooling in 3 hours; Described cooling comprises two stages, and first stage is temperature-fall period at the uniform velocity, and cooling rate is 5 ℃/minute to 650-700 ℃; Then carry out the subordinate phase cooling, described subordinate phase cooling selects water cooling to be cooled to 130-150 ℃, and wherein the temperature of water coolant remains between 75-85 ℃.
Tempering is warming up to 180-200 ℃ with above-mentioned cooled blank in tempering stove, and processes after being incubated 2 hours;
Refining, the size on demand of the blank after the tempering is made with extra care processing, then carry out post-processed and obtain finished product.
Embodiment 2
Described preparation method is:
Batching is selected by weight percentage to include, 1.5% copper, 0.5% chromium, 0.5% silicon, 0.8% graphite, 0.8% manganese, 1.0% Zinic stearas, 1.0% ferrophosphorus powder, and surplus is iron; Wherein the content of phosphorus is 5% by weight percentage in the ferrophosphorus powder; And select or with above-mentioned each form and to be processed into powder, be to be Powdered by the outsourcing material in the present embodiment; Optimal selection is no more than 100 microns for the particle diameter of each powder; To in mixer, mix 60 minutes through above-mentioned each powder that calculates;
Compacting is to suppress 30 seconds under the 600MPa pressure mixed powder at pressure, makes pressed compact;
Sintering, with pressed compact at 1100-1150 ℃ of lower sintering, after be cooled to 130-150 ℃; Sintering is sintering stage by stage, at first carry out presintering under 650-900 ℃, and be incubated 3 hours, and band heat suppresses and shaping under 180MPa pressure, to improve the density of structure; And then 1100-1150 ℃ of lower sintering then cooling in 3 hours; Described cooling comprises two stages, and first stage is temperature-fall period at the uniform velocity, and cooling rate is 5 ℃/minute to 650-700 ℃; Then carry out the subordinate phase cooling, described subordinate phase cooling selects water cooling to be cooled to 130-150 ℃, and wherein the temperature of water coolant remains between 75-85 ℃.
Tempering is warming up to 180-200 ℃ with above-mentioned cooled blank in tempering stove, and processes after being incubated 2 hours;
Refining, the size on demand of the blank after the tempering is made with extra care processing, then carry out post-processed and obtain finished product.
Embodiment 3
Described preparation method is:
Batching is selected by weight percentage to include, 1.0% copper, 0.4% chromium, 0.4% silicon, 0.6% graphite, 0.5% manganese, 0.8% Zinic stearas, 0.8% ferrophosphorus powder, and surplus is iron; Wherein the content of phosphorus is 5% by weight percentage in the ferrophosphorus powder; And select or with above-mentioned each form and to be processed into powder, be to be Powdered by the outsourcing material in the present embodiment; Optimal selection is no more than 100 microns for the particle diameter of each powder; To in mixer, mix 45 minutes through above-mentioned each powder that calculates;
Compacting is to suppress 20 seconds under the 600MPa pressure mixed powder at pressure, makes pressed compact;
Sintering, with pressed compact at 1100-1150 ℃ of lower sintering, after be cooled to 130-150 ℃; Sintering is sintering stage by stage, at first carry out presintering under 650-900 ℃, and be incubated 2.3 hours, and band heat suppresses and shaping under 180MPa pressure, to improve the density of structure; And then 1100-1150 ℃ of lower sintering then cooling in 3.5 hours; Described cooling comprises two stages, and first stage is temperature-fall period at the uniform velocity, and cooling rate is 4 ℃/minute to 650-700 ℃; Then carry out the subordinate phase cooling, described subordinate phase cooling selects water cooling to be cooled to 130-150 ℃, and wherein the temperature of water coolant remains between 75-85 ℃.
Tempering is warming up to 180-200 ℃ with above-mentioned cooled blank in tempering stove, and processes after being incubated 2 hours;
Refining, the size on demand of the blank after the tempering is made with extra care processing, then carry out post-processed and obtain finished product.
Claims (4)
1. powder metallurgy flange preparation method is characterized in that:
Batching is selected by weight percentage to include, the manganese of the silicon of the copper of 0.5-1.5%, the chromium of 0.3-0.5%, 0.3-0.5%, the graphite of 0.5-0.8%, 0.3-0.8%, the Zinic stearas of 0.8-1.0%, the ferrophosphorus powder of 0.5-1.0%, and surplus is iron; And select or with above-mentioned each form and to be processed into powder, optimal selection is no more than 100 microns for the particle diameter of each powder; To in mixer, mix 30-60 minute through above-mentioned each powder that calculates;
Compacting is to suppress under the 550-600MPa pressure 10-30 second mixed powder at pressure, makes pressed compact;
Sintering, with pressed compact at 1100-1150 ℃ of lower sintering, after be cooled to 130-150 ℃;
Tempering is warming up to 180-200 ℃ with above-mentioned cooled blank in tempering stove, and insulation was processed after 1-3 hour;
Refining, the size on demand of the blank after the tempering is made with extra care processing, then carry out post-processed and obtain finished product.
2. powder metallurgy flange preparation method according to claim 1, it is characterized in that: described sintering is sintering stage by stage, at first carries out presintering under 650-900 ℃, and insulation 1-3 hour, and be with heat under 160-180MPa pressure, to suppress and shaping, to improve the density of structure; And then 1100-1150 ℃ of then cooling in lower sintering 2-4 hour; Described cooling comprises two stages, and first stage is temperature-fall period at the uniform velocity, and cooling rate is no more than 5 ℃/minute to 650-700 ℃; Then carry out the subordinate phase cooling, described subordinate phase cooling selects water cooling to be cooled to 130-150 ℃.
3. powder metallurgy flange preparation method according to claim 1, it is characterized in that: the temperature of described water coolant remains on 75-85 ℃.
4. powder metallurgy flange preparation method according to claim 1, it is characterized in that: the content of phosphorus is 5% by weight percentage in the described ferrophosphorus powder.
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| CN2012104945468A CN102994882A (en) | 2012-11-22 | 2012-11-22 | Preparation method of powder metallurgy flange |
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| CN2012104945468A CN102994882A (en) | 2012-11-22 | 2012-11-22 | Preparation method of powder metallurgy flange |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103014507A (en) * | 2012-11-22 | 2013-04-03 | 宁波市群星粉末冶金有限公司 | Powder metallurgy flange and preparation method thereof |
| CN103361565A (en) * | 2013-06-21 | 2013-10-23 | 马鞍山市恒毅机械制造有限公司 | Ceramimetallurgical flange and manufacturing method thereof |
| CN103567435A (en) * | 2013-10-10 | 2014-02-12 | 铜陵国方水暖科技有限责任公司 | Powder metallurgy flange and preparation method thereof |
| CN103567434A (en) * | 2013-10-10 | 2014-02-12 | 铜陵国方水暖科技有限责任公司 | Powder metallurgy flange and preparation method thereof |
| CN103602909A (en) * | 2013-10-10 | 2014-02-26 | 铜陵新创流体科技有限公司 | Powder metallurgy antifriction bearing and preparation method thereof |
| CN103602927A (en) * | 2013-10-10 | 2014-02-26 | 铜陵新创流体科技有限公司 | Lead-free bearing steel and preparation method thereof |
| CN104409185A (en) * | 2014-10-29 | 2015-03-11 | 中国船舶重工集团公司第七二五研究所 | Preparation method for copper-chromium alloy flange of upper insulator of electric locomotive |
| CN105371030A (en) * | 2015-12-21 | 2016-03-02 | 常熟市广汇机械设备有限公司 | Large-caliber bushing ring flange |
| CN108486498A (en) * | 2018-03-07 | 2018-09-04 | 安徽铜陵丰林法兰制造有限公司 | A kind of preparation method of flange |
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| EP1002883A1 (en) * | 1998-11-19 | 2000-05-24 | Eaton Corporation | Powdered metal valve seat insert |
| CN1566392A (en) * | 2003-06-24 | 2005-01-19 | 合肥工业大学 | Reinforced iron-base alloy and method for preparing same |
| CN101638819A (en) * | 2009-09-01 | 2010-02-03 | 重庆市江北区利峰工业制造有限公司 | Powder metallurgy bolster and production technology thereof |
| CN102251168A (en) * | 2011-07-07 | 2011-11-23 | 无锡小天鹅精密铸造有限公司 | Smelting composition for flange |
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2012
- 2012-11-22 CN CN2012104945468A patent/CN102994882A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1002883A1 (en) * | 1998-11-19 | 2000-05-24 | Eaton Corporation | Powdered metal valve seat insert |
| CN1566392A (en) * | 2003-06-24 | 2005-01-19 | 合肥工业大学 | Reinforced iron-base alloy and method for preparing same |
| CN101638819A (en) * | 2009-09-01 | 2010-02-03 | 重庆市江北区利峰工业制造有限公司 | Powder metallurgy bolster and production technology thereof |
| CN102251168A (en) * | 2011-07-07 | 2011-11-23 | 无锡小天鹅精密铸造有限公司 | Smelting composition for flange |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103014507A (en) * | 2012-11-22 | 2013-04-03 | 宁波市群星粉末冶金有限公司 | Powder metallurgy flange and preparation method thereof |
| CN103361565A (en) * | 2013-06-21 | 2013-10-23 | 马鞍山市恒毅机械制造有限公司 | Ceramimetallurgical flange and manufacturing method thereof |
| CN103567435A (en) * | 2013-10-10 | 2014-02-12 | 铜陵国方水暖科技有限责任公司 | Powder metallurgy flange and preparation method thereof |
| CN103567434A (en) * | 2013-10-10 | 2014-02-12 | 铜陵国方水暖科技有限责任公司 | Powder metallurgy flange and preparation method thereof |
| CN103602909A (en) * | 2013-10-10 | 2014-02-26 | 铜陵新创流体科技有限公司 | Powder metallurgy antifriction bearing and preparation method thereof |
| CN103602927A (en) * | 2013-10-10 | 2014-02-26 | 铜陵新创流体科技有限公司 | Lead-free bearing steel and preparation method thereof |
| CN103602927B (en) * | 2013-10-10 | 2016-01-20 | 铜陵新创流体科技有限公司 | A kind of Pb-free bearing steel and preparation method thereof |
| CN103602909B (en) * | 2013-10-10 | 2016-01-20 | 铜陵新创流体科技有限公司 | A kind of powder metallurgy rolling bearing and preparation method thereof |
| CN104409185A (en) * | 2014-10-29 | 2015-03-11 | 中国船舶重工集团公司第七二五研究所 | Preparation method for copper-chromium alloy flange of upper insulator of electric locomotive |
| CN105371030A (en) * | 2015-12-21 | 2016-03-02 | 常熟市广汇机械设备有限公司 | Large-caliber bushing ring flange |
| CN108486498A (en) * | 2018-03-07 | 2018-09-04 | 安徽铜陵丰林法兰制造有限公司 | A kind of preparation method of flange |
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Application publication date: 20130327 |