CN101658930B - Water atomizing steel powder used for high-compressibility sintering hardening and production method thereof - Google Patents
Water atomizing steel powder used for high-compressibility sintering hardening and production method thereof Download PDFInfo
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- CN101658930B CN101658930B CN2009101023090A CN200910102309A CN101658930B CN 101658930 B CN101658930 B CN 101658930B CN 2009101023090 A CN2009101023090 A CN 2009101023090A CN 200910102309 A CN200910102309 A CN 200910102309A CN 101658930 B CN101658930 B CN 101658930B
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Abstract
The invention relates to water atomizing steel powder used for high-compressibility sintering hardening and a production method thereof. The water atomizing steel power comprises the following raw material components by weight percent: 1.0% of nickel, 1.0% of manganese, 2.0% of copper and the balance of iron, wherein water atomizing pure iron powder with compressibility more than 7g/cm<3> under the condition of 600Mpa is adopted as basal power, and is dispersed in a reduction annealing furnace together with 300 meshes of copper powder and Ni-50Mn alloy powder atomized by adopting inert gases,thus obtaining the water atomizing steel powder used for high-compressibility sintering hardening; and when powder metallurgy parts are produced, 0.7-0.8% of graphite powder of 500 meshes and 0.7-0.8% of lubricant stearic acid zinc powder are added according to weight percent, mixed for 1 hour in a V-shaped blender mixer, and sintered for 1 hours in a sintering furnace under the temperature of 112 DEG C. The invention has the beneficial effects that the sintering hardening powder has high compressibility. Therefore, the strong sintering hardening capability of Mn is utilized effectively, and the reduction of the compressibility of the iron powder is avoided. The material cost is reduced by more than 20%, and simultaneously, the diffusion technology is more energy-saving compared with the vacuum annealing technology.
Description
Technical field
The present invention belongs to high-performance powder metallurgy with alloy powder manufacturing technology field, is specifically related to a kind of water atomizing steel powder used for high-compressibility sintering hardening and production method.
Background technology
The sinter-hardened phenomenon that intensity and hardness raising in the sintering process of iron-based powder metallurgy parts, occur that is meant.The main feature of sinter-hardened technology is the heat treatment step after having saved the iron-base part sintering under the prerequisite of the mechanical property that obtains high strength and high rigidity, has reduced the production cost of part; Because of the much lower distortion of avoiding part of the more traditional quenching technical of cooling velocity, improved the precision of iron-base part simultaneously.
All there are the production sinter-hardening powder in Sweden Hoeganaes Corp., Quebec, CAN metal dust company at present.A kind of sinter-hardened powder ATOMET4701 (Fe-0.45Mn-0.45Cr-1Mo-0.9Ni prealloy comminuted steel shot with Quebec, CAN metal dust company; Add 2%Cu and 0.75%C) be example; The composition of this sinter-hardening powder has comprised and has had quenching degree strong alloying element Ni, Mo, Mn, Cr, carbon and Cu etc.; And along with raw-material price generally goes up; In order to reduce the cost of raw material of powder metallurgy parts, lower-cost Mn, Cr become the desirable alloying element of sinter-hardened powder, but the affinity of these alloying elements and oxygen is very strong; When sintering, forming oxide easily loses strengthening effect and sinter-hardened effect and has to adopt the complete pre-alloyed comminuted steel shot of water atomization; And the hardness of pre-alloyed powder can impact powder compressibility, therefore needs the water atomization powdered alloy steel that contains Cr, Mn is carried out annealing in process to reduce its microhardness under high vacuum, and this operation has increased the cost of powder to a certain extent.
Summary of the invention
The object of the invention is to overcome the deficiency of above-mentioned technology; And a kind of water atomizing steel powder used for high-compressibility sintering hardening and production method are provided; Select economy for use and practical alloy material,, the production technology of guaranteeing the powder high-compressibility is provided simultaneously to obtain sinter-hardened effect.
The present invention realizes the technical scheme that above-mentioned purpose adopts.This water atomizing steel powder used for high-compressibility sintering hardening, it is made up of the material component of following weight ratio: nickel: 1.0%; Manganese: 1.0%; Copper: 2.0%; Iron: surplus, added weight is than being the graphite powder of 0.7%-0.8%, the lubricant stearic acid zinc powder of weight ratio 0.7%-0.8% on the basis of above-mentioned raw materials component.The percentage of graphite powder and lubricant stearic acid zinc powder is benchmark with the component of above-mentioned raw materials.
The production method of this water atomizing steel powder used for high-compressibility sintering hardening according to the invention, this method may further comprise the steps: select for use in 600MPa condition lower compression property greater than 7g/cm
3100 orders below the water atomization straight iron powder as original washing powder; With 300 order copper powders and adopt the Ni-50Mn alloy powder below 100 orders of inert gas atomizer in reductive annealed oven, to spread; Diffusion temperature is set at 800 ℃-850 ℃; Obtain high-compressibility sclerosis water atomizing steel powder, when producing powdered metal parts, adding weight ratio in the high-compressibility sclerosis water atomizing steel powder is the 500 order graphite powders of 0.7%-0.8% and the lubricant stearic acid zinc powder of weight ratio 0.7%-0.8%; Mixed 1 hour at the V-type batch mixer; (600MPa) is pressed into standard specimen through press, and sintering is 1 hour in 1120 ℃ of sintering temperature stoves, obtains water atomizing steel powder used for high-compressibility sintering hardening.
The effect that the present invention is useful:
1, owing to alloying element Mn, Ni have very strong hardening capacity to the iron-based body; And Mn element and oxygen are prone to form oxide; Adopt the Ni-50Mn alloy powder of inert gas atomizer; Manganese element reduces than the activity of manganese powder significantly in this alloy powder of one side, helps the alloying between manganese and the iron, brings into play its reinforcement to the iron-based body to greatest extent; On the other hand, the fusing point of nickel-manganese is 1030 ℃, reaches the rapid cladding iron powder particle of alloy liquid phase that fusing point forms later on, and quick solid-liquid alloying takes place, and realizes the homogenising of manganese element.Through with high-compressibility straight iron powder DIFFUSION TREATMENT, this sinter-hardened powder still has high compression performance.So just effectively bring into play the strong sinter-hardened ability of Mn and avoided reducing the iron powder compressibility.
2, because alloying element price on market of selecting for use is lower than the alloying element of other prescription, and material cost reduces more than 20%, the while diffusion technique is than vacuum annealing process energy efficient, so product price is lower more than 30% than existing market product.
The specific embodiment:
Below in conjunction with specific embodiment the present invention is described further: present embodiment provided detailed embodiment and process, but protection scope of the present invention is not limited to following embodiment being to implement under the prerequisite with technical scheme of the present invention.
Embodiment 1:
Choosing the 960kg compressibility is 7.12g/cm
3The water atomization straight iron powder of (under the 600MPa condition); Add 20kgNi-50Mn aerosolization alloy powder and 20kg-300 order electrolytic copper powder; Be placed in the mixing machine of 1000L and mixed 1 hour, take out in the back input steel band type reductive annealed oven and spread, diffusion temperature is set at 820 ℃; Diffusion is after broken, sieve classification obtains the sinter-hardened alloy powder of-100 orders, and recording powder compressibility is 7.14g/cm
3(under the 600MPa condition); Choose this powder 25kg, add 0.175kg-500 order graphite powder and 0.175kg zinc stearate powder (lubricant), mixed 1 hour at the V-type batch mixer; (600MPa) is pressed into standard specimen through press; Sintering is 1 hour in 1120 ℃ of sintering temperature stoves, and it is some to obtain test specimen, following through testing result:
| Numbering | Hardness (HRC) | Tensile strength (MPa) |
| 11 | 42 | 875 |
| 12 | 41 | 867 |
| 13 | 41 | 870 |
Embodiment 2:
Choosing the 964kg compressibility is 7.12g/cm
3The water atomization straight iron powder of (under the 600MPa condition); Add 18kgNi-50Mn alloy powder and 18kg-300 order electrolytic copper powder; Be placed in the mixing machine of 1000L and mixed 1 hour, take out in the back input steel band type reductive annealed oven and spread, diffusion temperature is set at 820 ℃; Diffusion is after broken, sieve classification obtains the sinter-hardened alloy powder of-100 orders, and recording powder compressibility is 7.14g/cm
3(under the 600MPa condition); Choose this powder 25kg, add 0.175kg-500 order graphite powder and 0.175kg zinc stearate powder (lubricant), mixed 1 hour at the V-type batch mixer; (600MPa) is pressed into standard specimen through press; Sintering is 1 hour in 1120 ℃ of sintering temperature stoves, and it is some to obtain test specimen, following through testing result:
| Numbering | Hardness (HRC) | Tensile strength (MPa) |
| 21 | 39 | 862 |
| 22 | 39 | 859 |
| 23 | 38 | 847 |
Embodiment 3:
Choosing the 956kg compressibility is 7.12g/cm
3The water atomization straight iron powder of (under the 600MPa condition); Add 22kgNi-50Mn alloy powder and 22kg-300 order electrolytic copper powder; Be placed in the mixing machine of 1000L and mixed 1 hour, take out in the back input steel band type reductive annealed oven and spread, diffusion temperature is set at 820 ℃; Diffusion is after broken, sieve classification obtains the sinter-hardened alloy powder of-100 orders, and recording powder compressibility is 7.14g/cm
3(under the 600MPa condition); Choose this powder 25kg, add 0.175kg-500 order graphite powder and 0.175kg zinc stearate powder (lubricant), mixed 1 hour at the V-type batch mixer; (600MPa) is pressed into standard specimen through press; Sintering is 1 hour in 1120 ℃ of sintering temperature stoves, and it is some to obtain test specimen, following through testing result:
| Numbering | Hardness (HRC) | Tensile strength (MPa) |
| 31 | 41 | 865 |
| 32 | 42 | 871 |
| 33 | 43 | 885 |
Embodiment 4:
In smelting furnace, drop into the pure low-carbon waste steel of 956.5kg; Add in the fusion process 20kg sheet nickel and 23.5kg low-carbon ferromanganese (containing manganese 85.1%) through atomizing, oven dry, reduction, fragmentation, classification, close to criticize and make-100 order water atomization alloyed powders, recording this powder compressibility is 6.95g/cm
3(under the 600MPa condition); Choose this powder 490kg, add-300 order electrolytic copper powder 10kg, be placed in the mixing machine and mixed 1 hour; Take out in the back input steel band type reductive annealed oven and spread; Diffusion temperature is set at 820 ℃, and diffusion is after broken, sieve classification obtains the sinter-hardened alloy powder of-100 orders, and recording powder compressibility is 6.97g/cm
3(under the 600MPa condition); Choose this powder 25kg, add 0.175kg-500 order graphite powder and 0.175kg zinc stearate powder (lubricant), mixed 1 hour at the V-type batch mixer; (600MPa) is pressed into standard specimen through press; Sintering is 1 hour in 1120 ℃ of sintering temperature stoves, and it is some to obtain test specimen, following through testing result:
| Numbering | Hardness (HRC) | Tensile strength (MPa) |
| 41 | 37 | 855 |
| 42 | 38 | 856 |
| 43 | 36 | 847 |
Chemical composition, production technology, compressibility, hardness, tensile strength summary sheet
Claims (1)
1. water atomizing steel powder used for high-compressibility sintering hardening, it is characterized in that: it is made up of the material component of following weight ratio: nickel: 1.0%; Manganese: 1.0%; Copper: 2.0%; Iron: surplus; Added weight is than being the graphite powder of 0.7%-0.8%, the lubricant stearic acid zinc powder of weight ratio 0.7%-0.8% on the basis of above-mentioned raw materials component.
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| CN2009101023090A CN101658930B (en) | 2009-09-03 | 2009-09-03 | Water atomizing steel powder used for high-compressibility sintering hardening and production method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102350497B (en) * | 2011-09-16 | 2013-02-06 | 中南大学 | High-compressibility water atomization iron powder and preparation method thereof |
| CN102676928A (en) * | 2012-06-07 | 2012-09-19 | 太仓市锦立得粉末冶金有限公司 | Powder metallurgy method |
| CN104550925A (en) * | 2014-12-25 | 2015-04-29 | 佛山市盈峰粉末冶金科技有限公司 | Manganese-contained powder metallurgy material for preparing iron-based structural component and preparation method of manganese-contained powder metallurgy material |
| ES2916093T3 (en) * | 2016-03-23 | 2022-06-28 | Hoeganaes Ab Publ | iron-based powder |
| CN107297494A (en) * | 2017-06-20 | 2017-10-27 | 江苏军威电子科技有限公司 | A kind of garden tool set mixed powder and preparation method thereof |
| CN109202067A (en) * | 2017-11-10 | 2019-01-15 | 宁波市鄞州业鑫汽车零部件有限公司 | It is a kind of that the sinter-hardened process of powder metallurgy product is realized using normal sintering furnace |
| CN108994309A (en) * | 2018-08-31 | 2018-12-14 | 鞍钢重型机械有限责任公司 | A kind of sinter-hardened water mist alloy powder and its manufacturing method |
| CN111761051B (en) * | 2020-06-10 | 2022-07-19 | 鞍钢(鞍山)冶金粉材有限公司 | Copper-containing iron powder for powder metallurgy and preparation method thereof |
| CN112935268A (en) * | 2021-02-23 | 2021-06-11 | 江苏威拉里新材料科技有限公司 | Preparation process of 3D printing metal powder |
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