CN101875184B - Casting zinc pill and production process thereof - Google Patents
Casting zinc pill and production process thereof Download PDFInfo
- Publication number
- CN101875184B CN101875184B CN2009102346770A CN200910234677A CN101875184B CN 101875184 B CN101875184 B CN 101875184B CN 2009102346770 A CN2009102346770 A CN 2009102346770A CN 200910234677 A CN200910234677 A CN 200910234677A CN 101875184 B CN101875184 B CN 101875184B
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- Prior art keywords
- zinc
- pill
- casting zinc
- titration
- roundness
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- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims abstract description 71
- 229910052725 zinc Inorganic materials 0.000 title claims abstract description 60
- 239000011701 zinc Substances 0.000 title claims abstract description 60
- 239000006187 pill Substances 0.000 title claims abstract description 46
- 238000005266 casting Methods 0.000 title claims abstract description 34
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 238000000465 moulding Methods 0.000 claims abstract description 25
- 229910052751 metal Inorganic materials 0.000 claims abstract description 21
- 239000002184 metal Substances 0.000 claims abstract description 21
- 239000002245 particle Substances 0.000 claims abstract description 17
- 238000004448 titration Methods 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 15
- 238000001816 cooling Methods 0.000 claims abstract description 12
- 238000012216 screening Methods 0.000 claims abstract description 10
- 238000001514 detection method Methods 0.000 claims abstract description 9
- 239000012535 impurity Substances 0.000 claims abstract description 8
- 238000002844 melting Methods 0.000 claims abstract description 8
- 230000008018 melting Effects 0.000 claims abstract description 8
- 238000012856 packing Methods 0.000 claims abstract description 6
- 230000002159 abnormal effect Effects 0.000 claims abstract description 5
- 239000000047 product Substances 0.000 claims description 25
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 238000005516 engineering process Methods 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 10
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 238000004458 analytical method Methods 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 239000011265 semifinished product Substances 0.000 claims description 3
- 235000019628 coolness Nutrition 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims description 2
- 239000011261 inert gas Substances 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 238000000889 atomisation Methods 0.000 abstract 1
- 238000007705 chemical test Methods 0.000 abstract 1
- 238000005246 galvanizing Methods 0.000 abstract 1
- 150000002739 metals Chemical class 0.000 abstract 1
- 238000000643 oven drying Methods 0.000 abstract 1
- 238000004506 ultrasonic cleaning Methods 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 9
- 125000004122 cyclic group Chemical group 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 244000137852 Petrea volubilis Species 0.000 description 1
- 208000034189 Sclerosis Diseases 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 238000002329 infrared spectrum Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000005480 shot peening Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000001238 wet grinding Methods 0.000 description 1
Landscapes
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Continuous Casting (AREA)
Abstract
The invention provides a casting zinc pill and a production process thereof, which relate to a metal product and the production process thereof. The casting zinc pill comprises the following components in percentage by weight: more than or equal to 99.99 percent of zinc and the balance of other metals and inevitable impurities; and when loaded, the casting zinc pill has the average hardness of 55+/-5HV and roundness deviation which is +/-2.5 percent of a nominal diameter. The production process of the casting zinc pill comprises zinc ingot selection, physical and chemical test, high-temperature melting, titration molding and cooling, ultrasonic cleaning, oven-drying, abnormal shape and size screening, detection, and packing and warehousing. The casting zinc pill of the invention has the advantages of high surface roundness, high durability, small hardness difference, small particle size, small particle difference and application to an atomization galvanizing process and the treatment of eliminating the surface stress of a high-end work piece; and the production process provided by the invention has the advantage of producing the casting zinc pill with the advantages.
Description
Technical field
The present invention relates to a kind of metallic article and production technology thereof, especially a kind of casting zinc pill and production technology thereof that is used for novel atomizing zincincation and removes the contour terminal tool of aircraft surface stress.
Background technology
China produces at present and the zinc ball product of use all adopts cutting, abrasive method to make, and its production technology mainly is: wire drawing-cutting-grinding.Produce the zinc ball of gained in this way, because the zinc metal material is softer, adopt the method for grinding bump, shape is not easy control, and corner angle are more, so there is following major defect: 1, the surface configuration deviation is very big; 2, the hardness deviation is big; 3, the particle diameter scope is bigger; 4, open ended ball blast density is less in the unit volume.This class zinc ball product resistance to impact in ball blast or shot-peening process is not enough with the function that eliminates stress, and consumes easily, and service life is short; Simultaneously can not be applied to the zincincation that atomizes.When eliminating the Shot Blasting of high-end sheet metal and key components and parts surface stress, shortcoming is particularly outstanding, to changing the surface of the work stress state, make the surface of the work sclerosis, improving the wearability and the fatigue resistance of part, DeGrain.
The innovation and creation content
The objective of the invention is to overcome above-mentioned defective, provide a kind of surperficial out of roundness height, good endurance, hardness deviation little, particle size is little, and the particle deviation is little, is applicable to casting zinc pill and production technology thereof that atomizing zincincation and high-end workpiece elimination surface stress is handled.
Technical solution of the present invention is:
Casting zinc pill, its weight percent consists of zinc more than or equal to 99.99%, surplus is other metal and unavoidable impurities, and the average hardness that load is measured down is 55HV ± 5HV, it is characterized in that: described casting zinc pill out of roundness deviation range nominal diameter ± 2.5%.
Described casting zinc pill granulometric range be nominal diameter between 0.1 millimeter to 2.5 millimeters, the particle deviation range be nominal diameter ± 2.5%.
Described casting zinc pill hardness deviation range is ± 5HV.
The endurance quality of described casting zinc pill be 8000 go to 16000 change between.
Casting zinc pill prepares by following production technology:
Zinc ingot metal is selected materials → physics and chemical analysis → high temperature melting → titration moulding and cooling → ultrasonic wave cleaning → oven dry → abnormal shape and size selection → detection → packing warehouse-in.
Described selecting materials refers to select for use the elemental composition ratio consistent with the finished product casting zinc pill, and the zinc ingot metal of hardness deviation in finished product casting zinc pill standard hardness ± 8HV scope is for producing raw material.
Described physics and chemical analysis refer to that by the product quality requirement rare metal and impurity ratio, hardness require to test, and must meet the heading requirement.
Described high temperature melting refers to zinc ingot metal is become zinc liquid by high temperature melting.
Described titration moulding and cooling are to instigate zinc liquid to ooze with certain speed, and because of metal surface tension progressively develops into the zinc ball, and cooled and solidified is shaped to the semi-finished product spheroid in the cooling procedure of whereabouts.
Described ultrasonic wave cleans and refers to use ultrasonic wave to wash cooling solution and other impurity in cleaning solution the molding semi product spheroid.
Described oven dry is meant dries the molding semi product spheroid that cleaned.
Described screening is meant sieves by size and special-shaped spheroid the molding semi product spheroid.
Described detection is meant particle deviation, particle out of roundness deviation ratio, durability, hardness number is detected.
Described packing is meant carries out inner wrapping with finished product by Board Lot.
Casting zinc pill provided by the invention, owing to adopt a casting mode to produce, therefore the zinc ball that cut, abrasive method makes, have surperficial out of roundness height, good endurance, the hardness deviation is little, particle size is little, the particle deviation is little advantage, be applicable to more that than the zinc ball of existing explained hereafter high-end workpiece eliminates that surface stress is handled and the atomizing zincincation.Casting zinc pill production technology provided by the invention, produce the zinc ball owing to adopt the mode of drop moulding, and by abnormal shape and size selection, the zinc ball of producing has surperficial out of roundness height, good endurance, the hardness deviation is little, particle size is little, the particle deviation is little characteristics.
The specific embodiment
A kind of casting zinc pill, its weight percent consists of zinc more than or equal to 99.99%, and surplus is other metal and unavoidable impurities.The average hardness that load is measured down is 55HV ± 5HV, and the hardness deviation range be ± 5HV, casting zinc pill out of roundness deviation range nominal diameter ± 2.5%, the particle deviation range be nominal diameter ± 2.5%, durability goes between 16000 commentaries on classics 8000.
The production technology of above-mentioned casting zinc pill is:
Zinc ingot metal is selected materials → physics and chemical analysis → high temperature melting → titration moulding and cooling → ultrasonic wave cleaning → oven dry → abnormal shape and size selection → detection → packing warehouse-in.
Wherein selecting materials is meant that to select the elemental composition ratio for use consistent with the finished product casting zinc pill, and the zinc ingot metal of hardness deviation in finished product casting zinc pill standard hardness ± 8HV scope is for producing raw material.
Physics and chemical analysis refer to by the product quality requirement, and rare metal and impurity ratio, hardness require to test, and guarantee to reach ingredient requirement.
High temperature melting is meant at airtight container---in the titration moulding stove, pressure condition is an atmospheric pressure, and heating-up temperature makes zinc ingot metal be fused into zinc liquid between 500 to 520 degrees centigrade.
Titration moulding and cooling are to point in the titration moulding stove that zinc ingot metal is fused into zinc liquid, feed inert gas, make pressure increase to 10-11 atmospheric pressure, open valve, make zinc liquid from diameter be some titration mouths of 0.2～0.5 millimeter with following of the speed of 9.0～10.0 meter per seconds, 9.0～10.0 meters of following height; Under the process of dripping be divided into four sections coolings, chilling temperature is respectively 350～420 degrees centigrade, 300～250 degrees centigrade, 100～150 degrees centigrade, subzero 10～subzero 20 degrees centigrade; Under drip passage for the sealing channel of nitrogen, nitrogen is cooled to nitrogen solution in the 4th section subzero 10～subzero 20 degrees centigrade of environment.Under drip in the process, zinc liquid is initially the fluid column shape, with following the height continuous change, under the metal surface tension effect, progressively be changed to the zinc ball, and cooled and solidified is shaped to the semi-finished product spheroid.Though the titration mouth diameter of every titration moulding stove is fixing identical, because titration moulding furnace pressure is in the dynamic change always, so the drop phenomenon that can occur differing in size, cause the zinc ball diameter of cooled and solidified moulding inconsistent.
Ultrasonic wave cleans and refers to use ultrasonic wave to wash cooling solution and other impurity in cleaning solution the molding semi product spheroid.
Oven dry is meant dries the molding semi product spheroid that cleaned.
Screening process was divided into for two steps, and the first step is sieved size, and second step sieved out of roundness.Size screening available means is a lot, such as selecting suitable purpose sieve to sieve, also can allow the molding semi product spheroid roll across spacing be the screening value to billowing tube etc.The method of out of roundness screening is also more, such as the resilience screening method, also the molding semi product spheroid can be put on the stepped inclined-plane that gradient is the 10-15 degree, ladder has more than the two-stage, the ladder slit is positive and negative 0.2 millimeter an of normal diameter, the molding semi product spheroid rolls forward, and the special-shaped spheroid that out of roundness is not enough falls into the ladder slit.
Detection is meant the particle deviation, particle out of roundness deviation ratio, and key indexs such as durability detect.
Particle deviation detection mode: detect by 20 products of picked at random, under the infrared spectrum tester, sphere diameter detected, diameter deviation be controlled at this product nominal diameter ± 2.5% within.
Out of roundness deviation detection mode: detect by 20 products of picked at random, utilize the infrared ray projecting apparatus, the spheroid projection by comprehensive four point locations, is obtained the out of roundness that difference between the bulb diameter is come testing product.
Durability test method: random sampling 500 gram pills and standby 100 gram pills from sample, 100 gram pills are all put into Ervin (Ai Wen) testing machine to be tested, Ervin (Ai Wen) testing machine is established 500 and is transferred a circulation to, if get little pill and the dust that dress is tested pill with 0.1 millimeter standard separating sieve sieve of nominal diameter after the cyclic test, replenish the pill weight of its loss with standby pill, and the like continue cyclic test and reach 100 grams until loss pill weight, calculate that thus the revolution that weightless 100 gram pills make is decided to be durability.
Hardness detection method: collect 100 casting zinc pills at random and inlay, inlay temperature and be no more than 130 degrees centigrade, inlay and use grinder buffing after finishing, make 1/3rd places of pill exposure near zinc ball nominal diameter size, with sand paper the pill face is polished then, the sand papering process is used wet-milling, prevent the pill hot-spot, to center on this flour milling 20 press its Vickers hardness of DIN50311 standard testing then, pellet size≤0.3 millimeter load is 4.90 newton (HV 0.5), pellet size 0.4-2.5 millimeter load is 9.81 newton (HV 1), each pill is surveyed a bit, get arithmetic mean of instantaneous value after 20 hardness number additions, and its any test value must be in this grade hardness range of regulation.
Packing is meant that with the weight standard bag distribution packaging of finished product by customer requirement packaging bag adopts brown paper to make, and stamps the product batches numbering, the date of production, main information such as manufacturer, warehouse-in.
Claims (1)
1. the production technology of a casting zinc pill, the weight percent of described casting zinc pill consists of zinc more than or equal to 99.99%, and surplus is other metal and unavoidable impurities, and the average hardness that load is measured down is 55 HV ± 5 HV; Described casting zinc pill out of roundness deviation range nominal diameter ± 2.5%; Described casting zinc pill granulometric range be nominal diameter between 0.1 millimeter to 2.5 millimeters, the particle deviation range be nominal diameter ± 2.5%; Described casting zinc pill hardness deviation range is ± 5HV; The endurance quality of described casting zinc pill be 8000 go to 16000 change between; The production technology for preparing described casting zinc pill is: zinc ingot metal is selected materials → physics and chemical analysis → high temperature melting → titration moulding and cooling → ultrasonic wave cleaning → oven dry → abnormal shape and size selection → detection → packing warehouse-in; Described high temperature melting is meant at airtight container---in the titration moulding stove, pressure condition is an atmospheric pressure, and heating-up temperature makes zinc ingot metal be fused into zinc liquid between 500 to 520 degrees centigrade; It is characterized in that: described special-shaped screening is the method for out of roundness screening, the method of described out of roundness screening is that the molding semi product spheroid is put on the stepped inclined-plane that gradient is the 10-15 degree, ladder has more than the two-stage, the ladder slit is normal diameter ± 0.2 millimeter, the molding semi product spheroid rolls forward, and the special-shaped spheroid that out of roundness is not enough falls into the ladder slit; Described titration moulding and cooling are to point in the titration moulding stove that zinc ingot metal is fused into zinc liquid, feed inert gas, make pressure increase to 10-11 atmospheric pressure, open valve, make zinc liquid from diameter be some titration mouths of 0.2～0.5 millimeter with following of the speed of 9.0～10.0 meter per seconds, 9.0～10.0 meters of following height; Under the process of dripping be divided into four sections coolings, chilling temperature is respectively 350～420 degrees centigrade, 300～250 degrees centigrade, 100～150 degrees centigrade, subzero 10～subzero 20 degrees centigrade; Under drip passage for the sealing channel of nitrogen, nitrogen is cooled to nitrogen solution in the 4th section subzero 10～subzero 20 degrees centigrade of environment; Under drip in the process, zinc liquid is initially the fluid column shape, with following the height continuous change, under the metal surface tension effect, progressively be changed to the zinc ball, and cooled and solidified is shaped to the semi-finished product spheroid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102346770A CN101875184B (en) | 2009-11-26 | 2009-11-26 | Casting zinc pill and production process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102346770A CN101875184B (en) | 2009-11-26 | 2009-11-26 | Casting zinc pill and production process thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101875184A CN101875184A (en) | 2010-11-03 |
| CN101875184B true CN101875184B (en) | 2011-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102346770A Expired - Fee Related CN101875184B (en) | 2009-11-26 | 2009-11-26 | Casting zinc pill and production process thereof |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103400624B (en) * | 2013-07-13 | 2017-05-24 | 大丰市大奇金属磨料有限公司 | Metal lead ball for shielding radiation and manufacturing method of metal lead ball |
| CN103397224A (en) * | 2013-07-13 | 2013-11-20 | 大丰市大奇金属磨料有限公司 | Alloy zinc shots and manufacturing method thereof |
| CN110722170A (en) * | 2019-10-26 | 2020-01-24 | 江苏亿达铸造机械有限公司 | Aerosol processing method for steel wire cut pellets |
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