CN101525728A - New material for hot rolling seamless steel tube steel balls and preparation method thereof - Google Patents
New material for hot rolling seamless steel tube steel balls and preparation method thereof Download PDFInfo
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- CN101525728A CN101525728A CN200910030890A CN200910030890A CN101525728A CN 101525728 A CN101525728 A CN 101525728A CN 200910030890 A CN200910030890 A CN 200910030890A CN 200910030890 A CN200910030890 A CN 200910030890A CN 101525728 A CN101525728 A CN 101525728A
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Abstract
The invention discloses a new material for hot rolling seamless steel tube steel balls, which comprises 3.0 percent to 4.1 percent of C, less than or equal to 1.2 percent of Si, 20 percent to 39 percent of Cr, 1.7 percent to 3.0 percent of Ni, 0.25 percent to 0.8 percent of Mn, and the balance of Fe. A preparation method of the hot rolling the seamless steel tube steel balls comprises: firstly, combining molding sand after molding to be made into an integral sand model, and installing the integral sand model on a centrifugal casting machine for casting; secondly, adding furnace charge in a middle frequency furnace for being melted into molten iron, and continuously heating after melting so as to perform degassing and modificating treatment on the molten iron; thirdly, deslagging the molten iron and pouring the molten iron into a casting ladle for secondary deslagging; scattering deslagging agent on the surface of the molten iron and pouring the molten iron into the sand model for molding by casting through the centrifugal casting machine; cooling, performing shake-out for clearing sand, removing a casting head and obtaining a cast; fourthly, clearing the molding sand on the surface of the cast for inspection; and forming a finished product by the processing of a ball crusher. The surface of the finished product is in metal primary color, and the finished product is inspected and put into a warehouse.
Description
Technical field
The present invention relates to a kind of making method that is used for the novel material and the steel ball thereof of hot rolled seamless steel tube steel ball.
Background technology
The mode of production of steel ball mainly is in sand mo(u)ld or die at present; pour the molten iron after the fusing in sand mo(u)ld moulding by the method for traditional gravity cast; pass through sand removal then; remove dead head; polishing; again by reaching desired size after the ball crusher polishing; through heat-treating again after the check; this method exists following shortcoming: (1) is the method for gravity casting owing to what adopt; therefore in the inside of spheroid; the near surface of ball and exist either large or small at the center of ball; shrinkage cavity more or less and loose; and the crystal grain of steel ball is thick partially; the poor quality that causes steel ball like this; can't guarantee consistency of product; (2) steel ball that makes of this method need be through Overheating Treatment; heat treated process not only needs to consume a large amount of heat energy, and cost improves, and is seriously polluted; do not meet national requirements for environmental protection; and the thermal treatment meeting makes steel ball produce distortion, is difficult to guarantee the precision of steel ball, according to investigation; the not shaped degree of the black ball of some factories is up to 300 μ; after Overheating Treatment, can produce layer of oxide layer in addition, present black, common name " black ball " on the surface of steel ball; can reduce the smooth finish of steel ball surface like this, thereby influence the smooth finish of steel pipe inwall.Adopt steel ball that aforesaid method makes under the condition of high temperature, high extruding and high friction, its work-ing life is short.
Summary of the invention
The present invention is a kind of making method that is used for the novel material and the steel ball thereof of hot rolled seamless steel tube steel ball, this novel material can improve the work-ing life of steel ball, this method does not need to heat-treat, cut down the consumption of energy and cost, the steel ball that makes not only grain structure is fine and closely woven, avoid in steel ball, occurring loose or shrinkage cavity phenomenon, the quality and the work-ing life of improving steel ball, and the precision of steel ball and highly polished.
The present invention has adopted following technical scheme: a kind of novel material that is used for the hot rolled seamless steel tube steel ball, and the weight percent of each component is: C 3.0-4.1%, Si≤1.2%, Cr 20-39%, Ni 1.7-3.0%, Mn0.25-0.8%, all the other are Fe.
The weight percent C 3.4-3.8% of each component of the present invention, Si≤1.2%, Cr26-32%, Ni are 1.8-2.7%, and Mn is 0.25-0.8%, and all the other are Fe.The weight percent of each component of the present invention is C3.5-3.65%, Si≤1.2%, and Cr28-30%, Ni are 1.9-2.4%, and Mn is 0.4-0.55%, and all the other are Fe.
The invention also discloses a kind of making method that is used for the hot rolled seamless steel tube steel ball, it may further comprise the steps: step 1, prepare molding sand, molding sand is carried out moulding, after moulding, carry out mould assembling, make whole sand mo(u)ld, should be installed on the centrifugal casting machine to be poured by the integral body sand mo(u)ld; Step 2, the configuration molten iron, in middle frequency furnace, add furnace charge and be fused into molten iron, melting follow-up temperature of continuing rising and molten iron is carried out degasification is rotten to be handled, is C 3.0-4.1% through the weight percent of each component in the molten iron behind the chemical analysis, Si≤1.2%, Cr 20-39%, Ni 1.7-3.0%, Mn 0.25-0.8%, all the other are Fe; Step 3, to skimming through the molten iron after the rotten processing of degasification, again molten iron is poured in the casting ladle, carry out skimming the second time, deslagging agent is sprinkling upon the molten iron surface, molten iron is poured in the sand mo(u)ld and is carried out casting by centrifugal casting machine, and then cool off, dead head is removed in the shake out sand removal, makes foundry goods; Step 4, the molding sand of removing cast(ing) surface is tested, and is processed to form finished product by ball crusher again, and the surface of finished product presents the metal primary colors, finished product is tested classification vanning, warehouse-in.
Scribble coating in the molding sand in the step 1 of the present invention after the moulding, coating is Zircon powder alcohol group dope, and molding sand is a resin sand.Described resin sand is furan resin-sand, and furan resin-sand comprises furane resin, silica sand and solidifying agent, furane resin: silica sand: the weight ratio of solidifying agent is 100: 1.8: 0.45, and the granularity of silica sand is the 50-100 order.Temperature when melting in the step 2 of the present invention reaches 1300-1400 ℃, melt and follow-uply continuous be warming up to 1500-1550 ℃ and carry out that degasification is rotten to be handled, the rotten process of handling of degasification is: at first aluminium is added under 1500-1550 ℃ condition and carry out degassing processing in the molten iron, aluminium accounts for 0.3% of molten iron total amount, add vanadium iron and light rare earths then successively, vanadium iron accounts for the 0.15-0.2% of molten iron total amount, and light rare earths accounts for 0.2% of molten iron total amount.In the step 2 of the present invention in the molten iron weight percent content of each composition be C 3.4-3.8%, Si≤1.2%, Cr26-32%, Ni 1.8-2.7%, Mn are 0.25-0.8%, all the other are Fe.In the step 2 in the molten iron weight percent content of each composition be C 3.5-3.65%, Si≤1.2%, Cr 28-30%, Ni 1.9-2.4%, Mn are 0.4-0.55%, all the other are Fe.The time of cast postcooling is 10 minutes in the step 3.
The present invention has following beneficial effect: the work-ing life that the novel material that the present invention adopts can improve steel ball.The present invention does not need to heat-treat in the process of preparation, and the employing centrifugal casting, solidification and crystallization under action of centrifugal force, so not only can make steel ball inner tissue fine and closely woven, avoid occurring the loose and shrinkage cavity phenomenon of steel ball, but also can cut down the consumption of energy greatly, save tooling cost, also can alleviate pollution simultaneously to environment.It is little to adopt this method to make the scale error of steel ball, and wear resistance is good, and the surface of steel ball does not have zone of oxidation, the surface of steel ball presents the metal primary colors, common name " Archon ", the smooth finish on surface is good, can improve the smooth finish of steel pipe inwall and the precision of steel pipe inwall size like this.The present invention carries out at the process need of preparation that degasification is rotten to be handled, and the process of degasification can be got rid of the gas in the molten iron, avoids occurring in the foundry goods pore, and the rotten process of handling can crystal grain thinning, and it is fine and closely woven that foundry goods is organized.
Embodiment
The invention discloses a kind of steel ball that is used for hot rolled seamless steel tube, the weight percent of its each component is: C 3.0-4.1%, and Si≤1.2%, Cr 20-39%, Ni 1.7-3.0%, Mn are 0.25-0.8%, all the other are Fe.The weight percent of each component of the present invention also can be C 3.4-3.8%, Si≤1.2%, and Cr26-32%, Ni are 1.8-2.7%, and Mn is 0.25-0.8%, and all the other are Fe.The optimum weight per-cent of each component of the present invention is C 3.5-3.65%, Si≤1.2%, and Cr28-30%, Ni are 1.9-2.4%, and Mn is 0.4-0.55%, and all the other are Fe.
Further specify below by embodiment:
Implement one: a kind of preparation method who is used for the hot rolled seamless steel tube steel ball, it may further comprise the steps: step 1, prepare molding sand, molding sand is a furan resin-sand, furan resin-sand comprises furane resin, silica sand and solidifying agent, furane resin: silica sand: the weight ratio of solidifying agent is 100: 1.8: 0.45, the granularity of silica sand is the 50-100 order, furan resin-sand is carried out moulding, to coating in the furan resin-sand after the moulding, coating is Zircon powder alcohol group dope again, carries out mould assembling after moulding, make whole sand mo(u)ld, should be installed on the centrifugal casting machine to be poured by the integral body sand mo(u)ld; Step 2, the configuration molten iron, in middle frequency furnace, add the furnace charge fusing, furnace charge is a steel scrap, high carbon chromium, low-carbon (LC) chromium, nickel and ferromanganese, after temperature reaches 1300-1400 ℃, furnace charge is fused into molten iron, melt and follow-up continuing be warming up to 1500-1550 ℃, again molten iron is carried out the rotten processing of degasification, the rotten process of handling of degasification is: at first under 1500-1550 ℃ of condition aluminium is added in the molten iron, aluminium accounts for 0.3% of molten iron total amount, adds vanadium iron and light rare earths then successively again, vanadium iron accounts for the 0.15-0.2% of molten iron total amount, light rare earths accounts for 0.2% of molten iron total amount, is C 3.5-3.65% through the weight percent content of each composition in the molten iron behind the chemical analysis, Si≤1.2%, Cr 28-30%, Ni 1.9-2.4%, Mn are 0.4-0.55%, and all the other are Fe; Step 3, to skimming through the rotten molten iron of handling of degasification, again molten iron is poured in the casting ladle, carry out skimming the second time, spread deslagging agent, molten iron is poured in the whole sand mo(u)ld carried out casting by centrifugal casting machine on the molten iron surface, and then cooled off 10 minutes, dead head is removed in the shake out sand removal, makes foundry goods; Step 4, the molding sand of removing cast(ing) surface is tested, and is processed to form finished product by ball crusher again, and the surface of finished product presents the metal primary colors, finished product is tested classification vanning, warehouse-in.
Claims (10)
1, a kind of novel material that is used for the hot rolled seamless steel tube steel ball is characterized in that the weight percent of each component is: C 3.0-4.1%, and Si≤1.2%, Cr 20-39%, Ni 1.7-3.0%, Mn 0.25-0.8%, all the other are Fe.
2, the novel material that is used for the hot rolled seamless steel tube steel ball according to claim 1 is characterized in that the weight percent of each component is: C 3.4-3.8%, and Si≤1.2%, Cr26-32%, Ni 1.8-2.7%, Mn0.25-0.8%, all the other are Fe.
3, the novel material that is used for the hot rolled seamless steel tube steel ball according to claim 1 is characterized in that the weight percent of each component is: C 3.5-3.65%, and Si≤1.2%, Cr28-30%, Ni 1.9-2.4%, Mn0.4-0.55%, all the other are Fe.
4, a kind of making method that is used for the hot rolled seamless steel tube steel ball, it may further comprise the steps:
Step 1 is prepared molding sand, and molding sand is carried out moulding, carries out mould assembling after moulding, makes whole sand mo(u)ld, should be installed on the centrifugal casting machine to be poured by the integral body sand mo(u)ld;
Step 2, the configuration molten iron, in middle frequency furnace, add furnace charge and be fused into molten iron, melting follow-up temperature of continuing rising and molten iron is carried out degasification is rotten to be handled, is C3.0-4.1% through the weight percent of each component in the molten iron behind the chemical analysis, Si≤1.2%, Cr 20-39%, Ni 1.7-3.0%, Mn 0.25-0.8%, all the other are Fe;
Step 3, to skimming through the molten iron after the rotten processing of degasification, again molten iron is poured in the casting ladle, carry out skimming the second time, deslagging agent is sprinkling upon the molten iron surface, molten iron is poured in the sand mo(u)ld and is carried out casting by centrifugal casting machine, and then cool off, dead head is removed in the shake out sand removal, makes foundry goods;
Step 4, the molding sand of removing cast(ing) surface is tested, and is processed to form finished product by ball crusher again, and the surface of finished product presents the metal primary colors, finished product is tested classification vanning, warehouse-in.
5, the making method that is used for the hot rolled seamless steel tube steel ball according to claim 4 is characterized in that scribbling coating in the molding sand after the moulding in the step 1, and coating is Zircon powder alcohol group dope, and molding sand is a resin sand.
6, the preparation method who is used for the hot rolled seamless steel tube steel ball according to claim 5, it is characterized in that described resin sand is furan resin-sand, furan resin-sand comprises furane resin, silica sand and solidifying agent, furane resin: silica sand: the weight ratio of solidifying agent is 100: 1.8: 0.45, and the granularity of silica sand is the 50-100 order.
7, the preparation method who is used for the hot rolled seamless steel tube steel ball according to claim 4, temperature when it is characterized in that melting in the step 2 reaches 1300-1400 ℃, melt and follow-uply continuous be warming up to 1500-1550 ℃ and carry out that degasification is rotten to be handled, the rotten process of handling of degasification is: at first aluminium is added under 1500-1550 ℃ condition and carry out degassing processing in the molten iron, aluminium accounts for 0.3% of molten iron total amount, add vanadium iron and light rare earths then successively, vanadium iron accounts for the 0.15-0.2% of molten iron total amount, and light rare earths accounts for 0.2% of molten iron total amount.
8, the preparation method who is used for the hot rolled seamless steel tube steel ball according to claim 4 is characterized in that in the step 2 that the weight percent content of each composition is C 3.4-3.8% in the molten iron, Si≤1.2%, Cr 26-32%, Ni 1.8-2.7%, Mn are 0.25-0.8%, and all the other are Fe.
9, the preparation method who is used for the hot rolled seamless steel tube steel ball according to claim 4 is characterized in that in the step 2 that the weight percent content of each composition is C 3.5-3.65% in the molten iron, Si≤1.2%, Cr 28-30%, Ni 1.9-2.4%, Mn are 0.4-0.5 5%, and all the other are Fe.
10, the preparation method who is used for the hot rolled seamless steel tube steel ball according to claim 4 is characterized in that the time of cast postcooling in the step 3 is 10 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910030890A CN101525728A (en) | 2009-04-20 | 2009-04-20 | New material for hot rolling seamless steel tube steel balls and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910030890A CN101525728A (en) | 2009-04-20 | 2009-04-20 | New material for hot rolling seamless steel tube steel balls and preparation method thereof |
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| CN101525728A true CN101525728A (en) | 2009-09-09 |
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| CN200910030890A Pending CN101525728A (en) | 2009-04-20 | 2009-04-20 | New material for hot rolling seamless steel tube steel balls and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105506443A (en) * | 2015-12-30 | 2016-04-20 | 安徽昱工耐磨材料科技有限公司 | High-chromium cast-iron roller sheet and machining method thereof |
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2009
- 2009-04-20 CN CN200910030890A patent/CN101525728A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105506443A (en) * | 2015-12-30 | 2016-04-20 | 安徽昱工耐磨材料科技有限公司 | High-chromium cast-iron roller sheet and machining method thereof |
| CN105506443B (en) * | 2015-12-30 | 2018-04-20 | 安徽昱工耐磨材料科技有限公司 | A kind of processing method of rich chromium cast iron roller skin |
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Open date: 20090909 |