CN110468342A - A kind of nonmagnetic balance weight processing technology - Google Patents

A kind of nonmagnetic balance weight processing technology Download PDF

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Publication number
CN110468342A
CN110468342A CN201910853660.7A CN201910853660A CN110468342A CN 110468342 A CN110468342 A CN 110468342A CN 201910853660 A CN201910853660 A CN 201910853660A CN 110468342 A CN110468342 A CN 110468342A
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burning
high temperature
balance weight
area
powder
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CN201910853660.7A
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Chinese (zh)
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CN110468342B (en
Inventor
苏凤戈
施鹏
郑玉平
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ZHEJIANG BAIDA PRECISION MANUFACTURING Corp.
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WENLING HENGFENG POWDER METALLURGY Co Ltd
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    • 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
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
    • 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
    • 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
    • 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
    • B22F3/1017—Multiple heating or additional 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
    • 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
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • 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
    • C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
    • 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
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • B22F2009/0824—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid with a specific atomising fluid
    • B22F2009/0828—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid with a specific atomising fluid with water
    • 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
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)

Abstract

The present invention provides a kind of nonmagnetic balance weight processing technologys, belong to field of powder metallurgy.It solves the problems, such as that existing balance weight processing technology metal loss is big.Balance weight processing technology that this is nonmagnetic is the following steps are included: A, preparation powder containing manganese alloy；B, mixing；C, it is pressed and molded；D, it is sintered；E, shaping.This is nonmagnetic, and balance weight processing technology metal loss is small.

Description

A kind of nonmagnetic balance weight processing technology
Technical field
The invention belongs to field of powder metallurgy, are related to a kind of nonmagnetic balance weight, and especially a kind of nonmagnetic balance weight adds Work technique.
Background technique
Nonmagnetic balance weight is the important component of compressor, and effect is to realize the balance of motor, reduces vibration and noise. The nonmagnetic balance weight of motor is all with copper in compressor at present and copper alloy processing is cast and zinc alloy diecasting forms, and copper and copper The price of alloy is high and fluctuation is big, and will cause biggish metal loss in process, and manufacturing cost is high, meanwhile, casting and Zinc alloy diecasting production environment is severe, in face of requiring higher and higher environmental requirement to seem helpless.
Summary of the invention
The purpose of the present invention is there is the above problem in view of the prior art, a kind of nonmagnetic balance weight processing work is proposed The technical issues of skill, solution is how to reduce metal loss.
Object of the invention can be realized by the following technical scheme: a kind of nonmagnetic balance weight processing technology, feature It is, comprising the following steps:
A, powder containing manganese alloy is prepared: using water mist alloy powder production technology and by the raw material system of following mass percent Manganese alloy powder: C:0.4~1.0 must be contained, Si:0.4~1.0, Mn:14~18, surplus is iron and inevitable impurity；
B, mixing: the raw material of following mass percent is poured into mixed powder machine and is mixed to get finished powder: copper powder: 0~15, C: 0.3~1, micro mist wax: 0.6~0.9, surplus is the violent alloyed powder of step A preparation；
C, be pressed and molded: it is 5.8~6.8g/cm that finished powder prepared by step B, which is poured into mold, and is pressed into density3Life Embryo, wherein the temperature for controlling mold is 60 DEG C~150 DEG C, and specific mo(u)lding pressure is 500Mpa~1300Mpa；
D, it is sintered: raw embryo being put into sintering furnace, and the protection of the mixed gas composed by ammonolysis craft gas and nitrogen Under be sintered, wherein continuously distributed pre-burning tie region and high temperature sintering region are provided in sintering furnace, and raw embryo exists It is successively conveyed in pre-burning tie region and high temperature sintering region, the temperature of pre-burning tie region is 750 DEG C~960 DEG C, and raw embryo rests on Time in pre-burning tie region is 20 minutes~100 minutes, and high temperature sintering region is 1050 DEG C~1260 DEG C, and raw embryo rests on height Time in temperature sintering region is 40 minutes~120 minutes；
E, sintered raw embryo shaping: is put into finishing mold correction of pressurizeing.
In above-mentioned nonmagnetic balance weight processing technology, the size distribution of the powder containing manganese alloy is 100 mesh~150 Mesh accounts for 10%, and 150 mesh~200 mesh account for 15%, and surplus is 200 mesh~325 mesh.
In above-mentioned nonmagnetic balance weight processing technology, the pre-burning tie region by continuously distributed one area of pre-burning, 2nd area of pre-burning and three district's groups of pre-burning at, wherein the temperature in one area of pre-burning is 750 DEG C, and the temperature in 2nd area of pre-burning is 850 DEG C, pre-burning The temperature in 3rd area is 960 DEG C.
In above-mentioned nonmagnetic balance weight processing technology, the high temperature sintering region is by continuously distributed high temperature sintering One area and two district's groups of high temperature sintering at, wherein the temperature in one area of high temperature sintering is 1050 DEG C, and the temperature in 2nd area of high temperature sintering is 1100 DEG C~1260 DEG C.
In above-mentioned nonmagnetic balance weight processing technology, gaseous mixture composed by ammonolysis craft gas and nitrogen in D step The ratio of body are as follows: ammonolysis craft gas accounts for 30%, and nitrogen accounts for 70%.
Compared with prior art, this nonmagnetic balance weight processing technology has the advantage that
1, nonmagnetic balance weight is manufactured using PM technique, metal material loss can have both been effectively reduced, to drop Low manufacturing cost；Again relative to existing casting and zinc alloy diecasting mode, pollution is few, can satisfy and is increasingly stringenter Environmental requirement, good environmental adaptability.
2, sintering is divided into 3 continuously distributed pre-burning areas and 2 continuously distributed high temperature sintering areas, to be easier to control Raw embryo sintering process is sintered raw embryo toward the direction of setting and precisely develops, Lai Tigao sintering precision and quality.
Detailed description of the invention
Fig. 1 is the flow chart of nonmagnetic balance weight processing technology.
Specific embodiment
Following is a specific embodiment of the present invention in conjunction with the accompanying drawings, technical scheme of the present invention will be further described, However, the present invention is not limited to these examples.
Embodiment one
As shown in Figure 1, nonmagnetic balance weight processing technology the following steps are included:
A, powder containing manganese alloy is prepared: using water mist alloy powder production technology and by the raw material system of following mass percent Manganese alloy powder: C:0.4~1.0 must be contained, Si:0.4~1.0, Mn:14~18, surplus is iron and inevitable impurity；Its In, the size distribution of the powder containing manganese alloy is that 100 mesh~150 mesh account for 10%, and 150 mesh~200 mesh account for 15%, surplus be 200 mesh~ 325 mesh；
B, mixing: the raw material of following mass percent is poured into mixed powder machine and is mixed to get finished powder: copper powder: 0, C:0.3, Micro mist wax: 0.6, surplus is the violent alloyed powder of step A preparation；
C, be pressed and molded: it is 5.8~6.8g/cm that finished powder prepared by step B, which is poured into mold, and is pressed into density3Life Embryo, wherein the temperature for controlling mold is 60 DEG C~150 DEG C, and specific mo(u)lding pressure is 500Mpa~1300Mpa；
D, it is sintered: raw embryo being put into sintering furnace, and the protection of the mixed gas composed by ammonolysis craft gas and nitrogen Under be sintered, wherein continuously distributed pre-burning tie region and high temperature sintering region are provided in sintering furnace, and raw embryo exists It is successively conveyed in pre-burning tie region and high temperature sintering region, the temperature of pre-burning tie region is 750 DEG C~960 DEG C, and raw embryo rests on Time in pre-burning tie region is 20 minutes~100 minutes, and high temperature sintering region is 1050 DEG C~1260 DEG C, and raw embryo rests on height Time in temperature sintering region is 40 minutes~120 minutes；Wherein, pre-burning tie region is by continuously distributed one area of pre-burning, pre-burning 2nd area and three district's groups of pre-burning at, wherein the temperature in one area of pre-burning is 750 DEG C, and the temperature in 2nd area of pre-burning is 850 DEG C, 3rd area of pre-burning Temperature be 960 DEG C；High temperature sintering region by continuously distributed one area of high temperature sintering and two district's groups of high temperature sintering at, wherein it is high The temperature in one area of temperature sintering is 1050 DEG C, and the temperature in 2nd area of high temperature sintering is 1100 DEG C~1260 DEG C；Ammonolysis craft gas and nitrogen The ratio of composed mixed gas are as follows: ammonolysis craft gas accounts for 30%, and nitrogen accounts for 70%.
E, sintered raw embryo shaping: is put into finishing mold correction of pressurizeing.
Embodiment two
The present embodiment two is essentially identical with the structure and principle of embodiment one, the difference is that: in step B at Product powder is made by the raw material of following mass percent: copper powder: 8, C:0.7, micro mist wax: and 0.8, surplus is the violent conjunction of step A preparation Bronze.
Embodiment three
The present embodiment three is essentially identical with the structure and principle of embodiment one, the difference is that: in step B at Product powder is made by the raw material of following mass percent: copper powder: 15, C:1.0, micro mist wax: and 0.9, surplus is the violent conjunction of step A preparation Bronze.
Specific embodiment described herein is only an example for the spirit of the invention.The neck of technology belonging to the present invention The technical staff in domain can make various modifications or additions to the described embodiments or replace by a similar method In generation, however, it does not deviate from the spirit of the invention or beyond the scope of the appended claims.

Claims (5)

1. a kind of nonmagnetic balance weight processing technology, which comprises the following steps:
A, it prepares powder containing manganese alloy: containing using water mist alloy powder production technology and by the raw material of following mass percent is obtained Manganese alloy powder: C:0.4~1.0, Si:0.4~1.0, Mn:14~18, surplus are iron and inevitable impurity；
B, mixing: the raw material of following mass percent is poured into mixed powder machine and is mixed to get finished powder: copper powder: 0~15, C:0.3 ~1, micro mist wax: 0.6~0.9, surplus is the violent alloyed powder of step A preparation；
C, be pressed and molded: it is 5.8~6.8g/cm that finished powder prepared by step B, which is poured into mold, and is pressed into density3Raw embryo, In, the temperature for controlling mold is 60 DEG C~150 DEG C, and specific mo(u)lding pressure is 500Mpa~1300Mpa；
D, be sintered: raw embryo is put into sintering furnace, and under the protection of the mixed gas composed by ammonolysis craft gas and nitrogen into Row sintering processes, wherein continuously distributed pre-burning tie region and high temperature sintering region are provided in sintering furnace, and raw embryo is in pre-burning It is successively conveyed in tie region and high temperature sintering region, the temperature of pre-burning tie region is 750 DEG C~960 DEG C, and raw embryo rests on pre-burning Time in tie region is 20 minutes~100 minutes, and high temperature sintering region is 1050 DEG C~1260 DEG C, and raw embryo rests on high temperature burning Time in tie region is 40 minutes~120 minutes；
E, sintered raw embryo shaping: is put into finishing mold correction of pressurizeing.
2. nonmagnetic balance weight processing technology according to claim 1, which is characterized in that the grain of the powder containing manganese alloy Degree is distributed as 100 mesh~150 mesh and accounts for 10%, and 150 mesh~200 mesh account for 15%, and surplus is 200 mesh~325 mesh.
3. nonmagnetic balance weight processing technology according to claim 1 or 2, which is characterized in that the pre-burning tie region It at, wherein the temperature in one area of pre-burning is 750 DEG C by continuously distributed one area of pre-burning, 2nd area of pre-burning and three district's groups of pre-burning, pre-burning two The temperature in area is 850 DEG C, and the temperature in 3rd area of pre-burning is 960 DEG C.
4. nonmagnetic balance weight processing technology according to claim 3, which is characterized in that the high temperature sintering region by Continuously distributed one area of high temperature sintering and two district's groups of high temperature sintering is 1050 DEG C at, wherein the temperature in one area of high temperature sintering, high temperature The temperature for being sintered 2nd area is 1100 DEG C~1260 DEG C.
5. nonmagnetic balance weight processing technology according to claim 1 or 2, which is characterized in that ammonolysis craft gas in D step With the ratio of mixed gas composed by nitrogen are as follows: ammonolysis craft gas accounts for 30%, and nitrogen accounts for 70%.
CN201910853660.7A 2019-09-10 2019-09-10 Nonmagnetic balance block processing technology Active CN110468342B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114645220A (en) * 2022-03-29 2022-06-21 浙江百达精工股份有限公司 Method for manufacturing high-manganese nonmagnetic high-density balance block
TWI797882B (en) * 2021-12-08 2023-04-01 國家中山科學研究院 Method for making non-magnetic counterweight

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103611925A (en) * 2013-10-25 2014-03-05 安徽省恒宇粉末冶金有限公司 Powder metallurgy formula of full-hydraulic steering gear stator and rotor pair and manufacturing process
CN104227001A (en) * 2014-09-24 2014-12-24 宁波金裕粉末冶金有限公司 Powder metallurgy manufacturing process for counterbalance of hay mower
CN107034420A (en) * 2017-06-21 2017-08-11 广东粤海华金科技股份有限公司 Nonmagnetic steel product and its manufacture method
CN109128137A (en) * 2018-09-10 2019-01-04 浙江百达精工股份有限公司 Compressor potassium steel balance weight and compressor potassium steel balance weight production method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103611925A (en) * 2013-10-25 2014-03-05 安徽省恒宇粉末冶金有限公司 Powder metallurgy formula of full-hydraulic steering gear stator and rotor pair and manufacturing process
CN104227001A (en) * 2014-09-24 2014-12-24 宁波金裕粉末冶金有限公司 Powder metallurgy manufacturing process for counterbalance of hay mower
CN107034420A (en) * 2017-06-21 2017-08-11 广东粤海华金科技股份有限公司 Nonmagnetic steel product and its manufacture method
CN109128137A (en) * 2018-09-10 2019-01-04 浙江百达精工股份有限公司 Compressor potassium steel balance weight and compressor potassium steel balance weight production method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
陈家坚等: "粉末冶金含铜无磁钢平衡块的组织与性能研究", 《制冷与空调》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI797882B (en) * 2021-12-08 2023-04-01 國家中山科學研究院 Method for making non-magnetic counterweight
CN114645220A (en) * 2022-03-29 2022-06-21 浙江百达精工股份有限公司 Method for manufacturing high-manganese nonmagnetic high-density balance block

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Effective date of registration: 20210926

Address after: 318000 No. 28, Lane 908, Jingzhong Road, Jiaojiang District, Taizhou City, Zhejiang Province

Patentee after: ZHEJIANG BAIDA PRECISION MANUFACTURING Corp.

Address before: 317500 No. 1055, Jiulong Avenue, Chengxi street, Wenling City, Taizhou City, Zhejiang Province

Patentee before: WENLING HENGFENG POWDER METALLURGY Co.,Ltd.