CN86108784A - Casting process for producing metal grinding ball - Google Patents
Casting process for producing metal grinding ball Download PDFInfo
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- CN86108784A CN86108784A CN 86108784 CN86108784A CN86108784A CN 86108784 A CN86108784 A CN 86108784A CN 86108784 CN86108784 CN 86108784 CN 86108784 A CN86108784 A CN 86108784A CN 86108784 A CN86108784 A CN 86108784A
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Abstract
A kind of process invention of Foundry Production metal grinding ball.The present invention is according to small-sized foundry goods---and the casting characteristic of abrading-ball, adopt vertical folded case rising pouring, horizontal parting, the type casting techniques of casting more.Adopt this process liquid metal filling steady, can not produce swash spatter, splashings, the gas in the die cavity is easy to get rid of, burning is few, the pushing off the slag effect is better, mill ball quality height, and can raising labour productivity is convenient to organize mechanized continuous productive process.
Description
The present invention is a kind of process invention-casting process for producing metal grinding ball that utilizes casting method to produce metal grinding ball.
In broken and grinding industry, the consumption of metal grinding ball is considerable, improves mill ball quality and wearability, and reducing its consumption is a very critical problem.At present, abrading-ball production mainly obtains by forging and cast two kinds of methods.The process of Foundry Production abrading-ball is different, the general explained hereafter that adopt the many castings of a type of flat case cast or vertical direct pattern grouping more.The present invention adopts the casting technique of vertical folded case rising pouring, horizontal parting, the many castings of a type according to the casting characteristic of small-sized foundry goods-abrading-ball.
Content Description of the present invention:
See accompanying drawing 1, the abrading-ball flow sheet.
1, raw material are prepared: raw material are divided into furnace building material, metal charge and Modeling Material.Wherein furnace building material is selected according to smelting equipment and mode; Metal charge requires to select according to the abrading-ball material; Modeling Material is selected according to the doing of sand mold, wet type mode and requirement of strength.
2, instrument, frock and equipment are prepared: should possess metal melting equipment and general Foundry Production essential instrument, template and sandbox.
3, metal smelt: select suitable smelting temperature according to metal material, determine to adopt electric furnace or furnace cupola to smelt.Prepare burden, go into stove heat fused, adjustment composition and temperature, chemical examination, thermometric, the cast of coming out of the stove through the stokehold.
4, join sand: determine molding sand kind and proportioning according to the casting character of selected metal material.Modeling Material proportioning in accordance with regulations poured into mixed grind becomes molding sand in the puddle mixer.
5, moulding: can adopt craft or mechanical means moulding, manufacture sand mold through back-up sand, tamping, molding, the type of repairing.As adopt dry type production, need that then the sand mold that makes is carried out drying and handle.
6, mould assembling, folded case, cast: with sand mold mould assembling, folded case and put case card and foundary weight well.Melted pouring metal melt is gone into die cavity.See accompanying drawing 2, metal liquid divides sprue (rising head of holding concurrently) 4-ingate 8 to inject the abrading-ball die cavity through cup 1-sprue 2-cross gate 3-, obtains the abrading-ball that is shaped after solidifying.Accompanying drawing 2 is for running gate system is provided with situation, and 1 is cup among the figure, and 2 is sprue, and 3 is cross gate, and 4 for dividing sprue, and 5 is abrading-ball, and 6 is steam vent, and 7 is rising head, and 8 is ingate, and 9 is top riser.
7, shake out, cleaning: the shake out sand removal, destroy behind the water riser abrading-ball surface overlap, burr and high spot are removed, guarantee that the surface is regular.
8, heat treatment: determine Technology for Heating Processing according to abrading-ball material and instructions for use.
The embodiment of the invention-HI-chrome cast iron for grinding balls manufacturing technique method is:
1, raw material are prepared: furnace building material is selected quartz sand, boric acid for use; Metal charge is selected carbon element steel scrap, rich chromium cast iron foundry returns, carbon ferrochrome, middle charcoal ferrochrome, molybdenum-iron, aluminium powder and electrode scrap for use; Modeling Material is selected quartz sand, bentonite, coal dust for use.
2, instrument, frock and equipment: get template, sandbox ready, be ready to manual Foundry Production operation usefulness instrument and electric furnace, puddle mixer, moulding machine, heat-treatment furnace, crane.
3, metal smelt: adopt the chemical analysis of electric induction furnace melting, HI-chrome cast iron for grinding balls to be: to contain C1.8～3.2%, Si0.4～1.0%, Mn0.4～1.0%, P＜0.10%, S＜0.06%, Cr12～20%, Mo and other element trace.
Key points for operation: furnace charge requirement drying is pure, furnace charge lumpiness size is evenly arranged in pairs or groups, it is closely knit to feed, and furnace charge per ton adds 3～4 kilograms of cullet slag making.
In fusion process, should in time smash material and flux, and progressively feed in raw material and be strictly on guard against bridging.Furnace charge is removed the initial stage slag after melting and finishing, the sampling chemical analysis.Molten steel per ton adds 2～3 kilograms of cullet and covers liquid level.With insertion-type thermocouple thermometric tapping temperature is 1440～1500 ℃, and pouring temperature is 1370～1430 ℃.
4, join sand:
Facing sand: add quartz sand 85～100%, bentonite 6～10%, old sand 0～15%, coal dust 3～4%, total moisture content 4.5～5.5%.Added in the puddle mixer mixed grind in order respectively 10～20 minutes.
Floor sand: add quartz sand 0～20%, bentonite 4～5%, old sand 80～100%, total moisture content 4～6%, added in the puddle mixer mixed grind in order respectively 5～10 minutes.
5, moulding: get template, sandbox and molding sand ready, carry out moulding.Make sand mold through back-up sand, tamping, bundle pore, molding, the type of repairing.
6, mould assembling, folded case, cast:
With the sand mold mould assembling that makes, 3～6 layers of sand mold that fallen are put case card and foundary weight well, and molten good pouring molten steel is gone into die cavity.Steel flow divides sprue (rising head of holding concurrently) 4-ingate 8 to go into the abrading-ball die cavity through (seeing accompanying drawing 2) cup 1-sprue 2-cross gate 3-.
7, shake out, cleaning: shake out, sand removal after casting back 2 hours, destroy water riser, abrading-ball cooling back grinder buffing overlap, burr and mouth of a river high spot.
8, heat treatment: adopt and quench and tempering twice heat treatment step.Quenching technical is: abrading-ball being lowered to stove, is warming up to about 650 ℃ insulation 1 hour with≤120 ℃/hour programming rates 400 ℃ of furnace temperature, is warming up to 940～980 ℃ of insulations 3～5 hours with stove again, comes out of the stove and drops into 20
#The cooling back proposes in the machine oil.
Tempering process is: the back abrading-ball that will quench was gone into stove again in 4 hours, and charging temperature＜200 ℃ with≤180 ℃/hour programming rates to 400～440 ℃, are incubated the air cooling of coming out of the stove after 3～5 hours.
Produce with process of the present invention, liquid metal filling is steady, do not produce swash spatter, splashings, the gas in the die cavity is easy to get rid of, burning is few, the pushing off the slag effect is better. Abrading-ball inherence and the presentation quality of producing are good, and can raise labour productivity, and are convenient to mechanized continuous productive process.
Claims (7)
1, a kind of through metal smelt, join the process invention of the Foundry Production metal grinding ball of sand, moulding, mould assembling cast, shake out cleaning, heat treatment process, the running gate system that it is characterized in that cast grinding ball adopts vertical folded case rising pouring, horizontal parting, the type casting techniques of casting, the chemical analysis of casting HI-chrome cast iron for grinding balls and the selection and the Technology for Heating Processing thereof of smelting temperature more.
2, the process of Foundry Production metal grinding ball according to claim 1 invention, it is characterized in that running gate system adopts the casting technique of vertical folded case rising pouring, horizontal parting, the many castings of a type, molten metal injects the abrading-ball die cavity at last through cup-sprue-cross gate-minute sprue (rising head of holding concurrently)-ingate when cast.
3, the process of Foundry Production metal grinding ball according to claim 1 invention is characterized in that described its chemical analysis of casting HI-chrome cast iron for grinding balls is: C1.8～3.2%; Si0.4～1.0%; Mn0.4～1.0%; P＜0.10%; S＜0.06%; Cr12～20%; Mo and other element trace.
4, the process of Foundry Production metal grinding ball according to claim 1 invention is characterized in that described its smelting temperature of casting HI-chrome cast iron for grinding balls is controlled to be: 1440～1500 ℃ of tapping temperatures; 1370～1430 ℃ of pouring temperatures.
5, the process of Foundry Production metal grinding ball according to claim 1 invention is characterized in that the Technology for Heating Processing of described casting HI-chrome cast iron for grinding balls adopts the ten temper technologies of quenching.
6, invent according to the process of claim 1,5 described Foundry Production metal grinding balls, the heat treatment quenching process that it is characterized in that described casting HI-chrome cast iron for grinding balls is: abrading-ball at 400 ℃ to be lowered to stove, with insulation about≤120 ℃/hour programming rates to 650 ℃ 1 hour, be warming up to 940～980 ℃ of insulations 3～5 hours with stove, come out of the stove then and drop into 20
#The cooling back proposes in the machine oil.
7, invent according to the process of claim 1,5 described Foundry Production metal grinding balls, the tempering heat treatment technology that it is characterized in that described casting HI-chrome cast iron for grinding balls is: the abrading-ball after will quenching was gone into stove again in 4 hours, charging temperature＜200 ℃, with≤180 ℃/hour programming rates to 400～440 ℃, be incubated the air cooling of coming out of the stove after 3～5 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86108784 CN86108784A (en) | 1986-12-27 | 1986-12-27 | Casting process for producing metal grinding ball |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86108784 CN86108784A (en) | 1986-12-27 | 1986-12-27 | Casting process for producing metal grinding ball |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86108784A true CN86108784A (en) | 1987-11-04 |
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ID=4804056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86108784 Pending CN86108784A (en) | 1986-12-27 | 1986-12-27 | Casting process for producing metal grinding ball |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86108784A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1325194C (en) * | 2004-01-17 | 2007-07-11 | 攀枝花钢铁有限责任公司钢铁研究院 | Method for producing ball mill burnisher |
| CN100346905C (en) * | 2003-03-25 | 2007-11-07 | 克劳迪亚斯·彼得斯技术有限责任公司 | Method for producing hollow grinding bodies and grinding bodies so produced |
| CN100455378C (en) * | 2006-12-21 | 2009-01-28 | 安徽省安工机械制造有限公司 | Method for manufacturing high chromium white wear-resistant cast iron |
| CN102240779A (en) * | 2011-08-05 | 2011-11-16 | 烟台鲁宝有色合金有限公司 | Process for manufacturing copper alloy in narrow crystallization temperature range |
| CN103981426A (en) * | 2014-05-07 | 2014-08-13 | 中建材宁国新马耐磨材料有限公司 | High-chromium alloy cast ball |
| CN105251946A (en) * | 2015-11-26 | 2016-01-20 | 江苏科技大学 | Casting device and casting method for anchor flukes |
-
1986
- 1986-12-27 CN CN 86108784 patent/CN86108784A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100346905C (en) * | 2003-03-25 | 2007-11-07 | 克劳迪亚斯·彼得斯技术有限责任公司 | Method for producing hollow grinding bodies and grinding bodies so produced |
| CN1325194C (en) * | 2004-01-17 | 2007-07-11 | 攀枝花钢铁有限责任公司钢铁研究院 | Method for producing ball mill burnisher |
| CN100455378C (en) * | 2006-12-21 | 2009-01-28 | 安徽省安工机械制造有限公司 | Method for manufacturing high chromium white wear-resistant cast iron |
| CN102240779A (en) * | 2011-08-05 | 2011-11-16 | 烟台鲁宝有色合金有限公司 | Process for manufacturing copper alloy in narrow crystallization temperature range |
| CN103981426A (en) * | 2014-05-07 | 2014-08-13 | 中建材宁国新马耐磨材料有限公司 | High-chromium alloy cast ball |
| CN103981426B (en) * | 2014-05-07 | 2016-08-24 | 中建材宁国新马耐磨材料有限公司 | A kind of high-chromium alloy cast ball |
| CN105251946A (en) * | 2015-11-26 | 2016-01-20 | 江苏科技大学 | Casting device and casting method for anchor flukes |
| CN105251946B (en) * | 2015-11-26 | 2018-04-06 | 江苏科技大学 | The casting device and casting method of a kind of anchor fluke |
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