CN1123337A - Cold excited alloy nodular cast iron and casting method for camshaft - Google Patents
Cold excited alloy nodular cast iron and casting method for camshaft Download PDFInfo
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- CN1123337A CN1123337A CN 94118311 CN94118311A CN1123337A CN 1123337 A CN1123337 A CN 1123337A CN 94118311 CN94118311 CN 94118311 CN 94118311 A CN94118311 A CN 94118311A CN 1123337 A CN1123337 A CN 1123337A
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Abstract
The chemical ingredients and theire compounding ratio of the present invention are (wt%):C is 3.1-3.6, Sl is 1.9-3.7, Mn is 0.4-0.6, P is less than 0.05, S is less than 0.03, Cr is 0.6-1.0, Mo (or Ni) is 0.3-0.5, Cu is 0.6-0.8, Mg residue is 0.035-0.065, Re residue is 0.025-0.06 and the rest is Fe. Said method uses industrial-frequency or middle-frequency furnace to smelt and wet-type pouring process. Its tapping temp. is 1450 deg.C, pouring temp. is 1340-1360 deg.C, chill depth is 7-10 mm and surface hardness HRc is greater than 47.
Description
The present invention relates to a kind of cold excited alloy nodular cast iron and casting method for camshaft, belong to cast metal material and Application Areas thereof.
At present, the camshaft of gasoline and diesel engine generally adopts steel, cast alloy iron, and the spheroidal graphite cast iron material is made, and adopts quenching or cold shock technology (cast alloy iron special process) to satisfy the over-all properties requirement.But steel axle and spheroidal graphite cast iron axle are unsuitable for the high-speed engine greater than 4000 rev/mins, and the intensity of chilled cast iron alloy is not suitable for the requirement of medium-and-large-sized engine to intensity.
The objective of the invention is to overcome steel in the prior art or spheroidal graphite cast iron material are unsuitable for the wear-resistant requirement of rev-happy engine and the chilled cast iron alloy material be unsuitable in, big-block engine is to the requirement of Material Strength and provide a kind of and be applicable to all kinds of engines wear-resistant, anti scuffing, antistripping, antifatigue point touch satisfactory a kind of cold excited alloy nodular cast iron in aspect and casting method for camshaft such as physical strength.To adapt to the trend of engine to efficient, low consumption, energy-conservation development.
The object of the present invention is achieved like this: the chemical composition of cold excited alloy nodular cast iron and proportioning (%) are C3.1-3.6, SI1.9-3.7, Mn0.4-0.6, P≤0.05, S≤0.03, Cr0.6-1.0, Mo (or NI) 0.3-0.5, Cu0.6-0.8, Mg residual 0.035-0.065, Re is residual 0.025-0.06, and surplus part is Fe.Adopt the heavy dose of at random inoculation method of 75% ferrosilicon, total silicon amount is 1.9%-3.7%, the stokehold chemical examination, and base iron carbon equivalent, nodulizing agent carbon equivalent (amount of changing is burnt in actual inspection) and nucleating agent carbon equivalent (absorbed dose) summation are between 4.3-4.55.With power frequency or intermediate frequency furnace melting, 1450 ℃ of tapping temperatures.The casting method for camshaft of cold excited alloy nodular cast iron is that green molding, wet type cast, sand humidity are below 4%; 1340-1360 ℃ of teeming temperatures; External chill thickness is 0.25-0.4 of cam peach external diameter, external chill width and cam peach are wide, external chill length is cam peach radial dimension behind the somatotype+2 times of chill thickness, the external chill inner chamber is with the radially physical size+single face 2mm of cam peach branch mailbox one side, the periphery can be arbitrary shape, and 1-2 ° gradient is arranged from bottom to top.Cold shock position physical and chemical parameter is: surface hardness: HR
c〉=47; Metallographic structure heart portion is perlite+globular graphite+cementite+residual austenite, and the surface is cementite+ledeburite+perlite+globular graphite, and the chill degree of depth is 7-10mm (peach point 14mm).
Compared to existing technology, the present invention has the following advantages:
Material adds alloying element, has improved physical strength, and it is wear-resistant, antifatigue, anti scuffing spalling resistance are good, can be used for engine more than 4000 rev/mins, long service life with the camshaft of its production.
Below in conjunction with embodiment in detail the utility model is described in detail:
The chemical composition of cold excited alloy nodular cast iron and proportioning (%) they are C3.1-3.6, SI1.9-3.7, and Mo0.4-0.6, P≤0.05, S≤0.03, Cr0.6-1.0, Mo (or NI) 0.3-0.5, Cu0.6-0.8, surplus part is Fe.Adopt the heavy dose of at random inoculation method of 75% ferrosilicon, total silicon amount is 1.9%-3.7%, the stokehold chemical examination reaches each percentages of ingredients, and makes base iron carbon equivalent, nodulizing agent carbon equivalent (amount of changing is burnt in actual inspection) nucleating agent carbon equivalent (absorbed dose) summation between 4.3-4.55.With power frequency or intermediate frequency furnace melting, 1450 ℃ of tapping temperatures.The casting method for camshaft of cold excited alloy nodular cast iron is that green molding, wet type cast, sand humidity are below 4%; 1340-1360 ℃ of teeming temperatures; External chill thickness be cam peach external diameter 0.25-0.4, external chill width and cam peach be wide, external chill length is cam peach radial dimension behind the somatotype+2 times of chill thickness, the external chill inner chamber is with the radially physical size+single face 2mm of cam peach branch mailbox one side, the periphery can be arbitrary shape, and 1-2 ° gradient is arranged from bottom to top.Cast iron is chemically examined, and cold shock position physical and chemical parameter will reach: surface hardness: HR
c〉=47; Metallographic structure heart portion is perlite+globular graphite+cementite+residual austenite, and the surface is cementite+ledeburite+perlite+globular graphite, and the chill degree of depth is 7-10mm (peach point 14mm).
Claims (6)
1, a kind of cold excited alloy nodular cast iron, it is characterized in that chemical composition and proportioning (%) are C3.1-3.6, SI1.9-3.7, Mn0.4-0.6, P≤0.05, S≤0.03, Cr0.6-1.0, Mo (or NI) 0.3-0.5, Cu0.6-0.8, Mg is residual 0.035-0.065, and Re is residual 0.025-0.06, and surplus part is Fe.
2, cold excited alloy nodular cast iron according to claim 1, it is characterized in that adopting the heavy dose of at random inoculation method of 75% ferrosilicon, total silicon amount is 1.9%-3.7%, the stokehold chemical examination, the base iron carbon equivalent, nodulizing agent carbon equivalent (amount of changing is burnt in actual inspection) and nucleating agent carbon equivalent (absorbed dose) summation are between 4.3-4.55.
3, cold excited alloy nodular cast iron according to claim 1 is characterized in that using the main frequency furnace melting, 1450 ℃ of tapping temperatures.
4, cold excited alloy nodular cast iron according to claim 1 is characterized in that using the intermediate frequency furnace melting, 1450 ℃ of tapping temperatures.
5, by the casting method for camshaft of the described cold excited alloy nodular cast iron of claim 1, it is characterized in that:
A, green molding, wet type cast, sand humidity are below 4%;
1340-1360 ℃ of b, teeming temperatures;
C, external chill thickness are 0.25-0.4 of cam peach external diameter, external chill width and cam peach are wide, external chill length is cam peach radial dimension behind the somatotype+2 times of chill thickness, the external chill inner chamber is with the radially physical size+single face 2mm of cam peach branch mailbox one side, the periphery can be arbitrary shape, and 1-2 ° gradient is arranged from bottom to top.
6, the casting method for camshaft of cold excited alloy nodular cast iron according to claim 5 is characterized in that cold shock position physical and chemical parameter is:
Surface hardness: HR
c〉=47;
Metallographic structure heart portion is perlite+globular graphite+cementite+residual austenite, and the surface is cementite+ledeburite+perlite+globular graphite, and the chill degree of depth is 7-10mm (peach point 14mm).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94118311 CN1123337A (en) | 1994-11-24 | 1994-11-24 | Cold excited alloy nodular cast iron and casting method for camshaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94118311 CN1123337A (en) | 1994-11-24 | 1994-11-24 | Cold excited alloy nodular cast iron and casting method for camshaft |
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| CN1123337A true CN1123337A (en) | 1996-05-29 |
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| CN 94118311 Pending CN1123337A (en) | 1994-11-24 | 1994-11-24 | Cold excited alloy nodular cast iron and casting method for camshaft |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102259159A (en) * | 2011-06-08 | 2011-11-30 | 苏州市海威特铸造厂 | Process for casting crank shaft |
| CN103695758A (en) * | 2013-12-23 | 2014-04-02 | 哈尔滨东安汽车动力股份有限公司 | Production method of fully-chilled camshaft |
| CN103981434A (en) * | 2014-05-28 | 2014-08-13 | 河南理工大学 | Preparation method for high-toughness nodular cast iron |
| CN104894466A (en) * | 2015-06-03 | 2015-09-09 | 郑州机械研究所 | High-strength, high-elasticity modulus and low-stress gray cast iron and manufacturing method thereof |
| CN107739769A (en) * | 2017-10-30 | 2018-02-27 | 太湖县爱杰机械铸造有限公司 | Cast iron cam shaft casting technique |
-
1994
- 1994-11-24 CN CN 94118311 patent/CN1123337A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102259159A (en) * | 2011-06-08 | 2011-11-30 | 苏州市海威特铸造厂 | Process for casting crank shaft |
| CN102259159B (en) * | 2011-06-08 | 2013-01-02 | 苏州市海威特铸造厂 | Process for casting crank shaft |
| CN103695758A (en) * | 2013-12-23 | 2014-04-02 | 哈尔滨东安汽车动力股份有限公司 | Production method of fully-chilled camshaft |
| CN103981434A (en) * | 2014-05-28 | 2014-08-13 | 河南理工大学 | Preparation method for high-toughness nodular cast iron |
| CN103981434B (en) * | 2014-05-28 | 2015-12-02 | 河南理工大学 | A kind of preparation method of high tough spheroidal graphite cast iron |
| CN104894466A (en) * | 2015-06-03 | 2015-09-09 | 郑州机械研究所 | High-strength, high-elasticity modulus and low-stress gray cast iron and manufacturing method thereof |
| CN107739769A (en) * | 2017-10-30 | 2018-02-27 | 太湖县爱杰机械铸造有限公司 | Cast iron cam shaft casting technique |
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