CN1241691C - Manufacturing method of special die for large-caliber cold-drawn seamless steel tube - Google Patents
Manufacturing method of special die for large-caliber cold-drawn seamless steel tube Download PDFInfo
- Publication number
- CN1241691C CN1241691C CN 03158209 CN03158209A CN1241691C CN 1241691 C CN1241691 C CN 1241691C CN 03158209 CN03158209 CN 03158209 CN 03158209 A CN03158209 A CN 03158209A CN 1241691 C CN1241691 C CN 1241691C
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- Prior art keywords
- heavy caliber
- particular manufacturing
- manufacturing craft
- cooled
- seamless steel
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- Expired - Fee Related
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 36
- 229910000831 Steel Inorganic materials 0.000 title abstract description 14
- 239000010959 steel Substances 0.000 title abstract description 14
- 238000001816 cooling Methods 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 10
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 8
- 238000005496 tempering Methods 0.000 claims abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 5
- 150000003839 salts Chemical class 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910000851 Alloy steel Inorganic materials 0.000 claims abstract description 4
- 239000007787 solid Substances 0.000 claims description 20
- 239000012266 salt solution Substances 0.000 claims description 8
- 238000003754 machining Methods 0.000 claims description 6
- 239000007921 spray Substances 0.000 claims description 6
- 238000005271 boronizing Methods 0.000 claims description 3
- 238000010792 warming Methods 0.000 claims description 2
- 239000000956 alloy Substances 0.000 abstract description 5
- 239000011159 matrix material Substances 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 3
- 229910045601 alloy Inorganic materials 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 3
- 238000010622 cold drawing Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 1
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Abstract
The manufacturing method of the special die for the large-caliber cold-drawn seamless steel tube adopts medium carbon low alloy steel (37CrMnMo) to cut and process into a special die blank for the large-caliber cold-drawn seamless steel tube, and then the special die blank is subjected to boriding treatment, salt water cooling and low-temperature tempering heat treatment. The invention has scientific material selection and advanced and simple process. The working surface of the special die for the large-caliber cold-drawn seamless steel tube, which is manufactured by the medium-carbon low-alloy material (37CrMnMo) through the heat treatment means, has very high hardness and wear resistance, and the matrix has enough strength and toughness, so that the special die is suitable for producing the large-caliber cold-drawn seamless steel tube; the manufacturing cost is low, and the product is about 1/40 of a hard alloy die with the same specification and model; the size of the die is stable, the service life is long, and the length of the seamless steel pipe with the large caliber can be continuously cold-drawn to be more than 300 meters; has good popularization and application value.
Description
Technical field
The present invention relates to a kind of cold-drawn and make the manufacture method of the particular manufacturing craft of heavy caliber seamless steel pipe, belong to the mold machining technology field.
Background technology
Be used to make the cold drawing die of seamless steel pipe, the working surface of mould need have suitable hardness and wearability, and matrix need have enough intensity and toughness.All the time, sintered-carbide die is because the hardness height, wearability is good and have certain intensity, occupies main status in small-sized cold-drawing seamless tube production.Along with the continuous development of solid drawn tube industry, heavy caliber seamless steel pipe cold-drawn production scale is in continuous expansion.And the large scale sintered-carbide die breaks in the time spent of doing that is subjected to huge circumferential stress easily because its matrix fragility is big, has seriously restricted production.Simultaneously, the big mould manufacture difficulty of carbide alloy is big, and material is expensive, the manufacturing cost height.
Summary of the invention
Purpose of the present invention is exactly that a kind of manufacture method that adopts the heavy caliber solid drawn tube particular manufacturing craft of low alloy material will be provided.Utilize the working surface of the heavy caliber solid drawn tube particular manufacturing craft that this method produces that very high hardness and wearability are arranged, matrix has enough intensity and toughness, is suitable for the cold-drawn heavy caliber seamless steel pipe and uses.
The object of the present invention is achieved like this, the manufacture method of heavy caliber solid drawn tube particular manufacturing craft, adopt medium carbon low alloy steel (37CrMnMo) machining to make heavy caliber solid drawn tube particular manufacturing craft base, pass through boronising processing, brine-cooled, low-temperature tempering heat treatment again.Described boronising is handled, be after filling up pack boronizing medium in the heavy caliber solid drawn tube particular manufacturing craft base die cavity that machining is made, hang in the roasting pot, and roasting pot sealed, again roasting pot is hung in the pit furnace, with heating furnace be warming up to 880 ℃-960 ℃ and be incubated 6-8 hour after, be cooled to 830 ℃-870 ℃ with stove and be incubated 3-4 hour again.Described brine-cooled, be in heating furnace, to hang out and to open the roasting cover together with roasting pot through the heavy caliber solid drawn tube particular manufacturing craft base that boronising is handled, go into to cool off in the salt solution 40-60 after second with anchor clamps clamping mould base, go out the salt water-air cooling and adopt the spray bucket to spray brine-cooled 50-60 second simultaneously to the mould base, again the mould base is gone into brine-cooled 20-30 after second, go out salt water-air cooling 50-60 after second, go into salt solution once more and stop 15-25 water outlet second.Described lonneal is after tempering 5-6 hour, to hang out air cooling in 180 ℃ of-200 ℃ of heating furnaces through the heavy caliber solid drawn tube particular manufacturing craft base after boronising processing, the brine-cooled.The mass percent concentration of described salt solution is 5-10%.
The selection of material science of the present invention, technology advanced person, simple.The heavy caliber solid drawn tube particular manufacturing craft that middle carbon and low-alloy material (37CrMnMo) produces by above-mentioned heat treatment means, there are very high hardness and wearability in the mold work surface, matrix has enough intensity and toughness, and the production that is fit to the heavy caliber solid drawn tube is used; Low cost of manufacture is about 1/40 of same specification model sintered-carbide die; Die size is more stable, long service life, and cold-drawn heavy caliber seamless steel pipe length is more than 300 meters continuously; The excellent popularization using value is arranged.
The specific embodiment
Adopt medium carbon low alloy steel (37CrMnMo) machining to make heavy caliber solid drawn tube particular manufacturing craft base, will fill up pack boronizing medium in the mould base die cavity, hang in then in the cylinder of steel (roasting pot), and cylinder of steel is sealed.Cylinder of steel hung in the pit furnace heat, after treating that furnace temperature rises to 920 degree and is incubated 7 hours, be cooled to 850 degree insulations 3.5 hours with stove, in stove, hang out jar and open cover then, hanging in concentration with special fixture clamping mould is cooling 50 seconds in 8% the salt solution, goes out water-air cooling again, adopts spray bucket spray salt solution simultaneously, cooling die die cavity 55 seconds, and then mould gone into brine-cooled 25 seconds.Went out water-air cooling again 55 seconds, and reentered water and stop water outlet in 20 seconds; Then tempering 5.5 hours in 190 ℃ of stoves immediately hangs out air cooling at last, produces qualified heavy caliber solid drawn tube particular manufacturing craft.
Claims (3)
1, a kind of manufacture method of heavy caliber solid drawn tube particular manufacturing craft is characterized in that adopting the medium carbon low alloy steel machining to make heavy caliber solid drawn tube particular manufacturing craft base, passes through boronising processing, brine-cooled, low-temperature tempering heat treatment again; Wherein, described boronising is handled, be after filling up pack boronizing medium in the heavy caliber solid drawn tube particular manufacturing craft base die cavity that machining is made, hang in the roasting pot, and roasting pot sealed, again roasting pot is hung in the pit furnace, with heating furnace be warming up to 880 ℃-960 ℃ and be incubated 6-8 hour after, be cooled to 830 ℃-870 ℃ with stove and be incubated 3-4 hour again; Described lonneal is after tempering 5-6 hour, to hang out air cooling in 180 ℃ of-200 ℃ of heating furnaces through the heavy caliber solid drawn tube particular manufacturing craft base after boronising processing, the brine-cooled.
2, the manufacture method of heavy caliber solid drawn tube particular manufacturing craft according to claim 1, it is characterized in that described brine-cooled, be in heating furnace, to hang out and to open the roasting cover together with roasting pot through the heavy caliber solid drawn tube particular manufacturing craft base that boronising is handled, go into to cool off in the salt solution 40-60 after second with anchor clamps clamping mould base, go out the salt water-air cooling and adopt the spray bucket to spray brine-cooled 50-60 second simultaneously to the mould base, again the mould base is gone into brine-cooled 20-30 after second, go out salt water-air cooling 50-60 after second, go into salt solution once more and stop 15-25 water outlet second.
3, the manufacture method of heavy caliber solid drawn tube particular manufacturing craft according to claim 1, the mass percent concentration that it is characterized in that described salt solution is 5-10%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03158209 CN1241691C (en) | 2003-09-08 | 2003-09-08 | Manufacturing method of special die for large-caliber cold-drawn seamless steel tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03158209 CN1241691C (en) | 2003-09-08 | 2003-09-08 | Manufacturing method of special die for large-caliber cold-drawn seamless steel tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1522807A CN1522807A (en) | 2004-08-25 |
| CN1241691C true CN1241691C (en) | 2006-02-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03158209 Expired - Fee Related CN1241691C (en) | 2003-09-08 | 2003-09-08 | Manufacturing method of special die for large-caliber cold-drawn seamless steel tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1241691C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101318839B (en) * | 2008-07-03 | 2011-06-29 | 上海交通大学 | Silicon carbide ceramic and method for manufacturing composite drawing mould of diamond |
| CN103203363A (en) * | 2013-04-30 | 2013-07-17 | 无锡大博金机械有限公司 | Modified elongation mandrel for seamless steel tube rolling mill and production method of same |
-
2003
- 2003-09-08 CN CN 03158209 patent/CN1241691C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1522807A (en) | 2004-08-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: YANGZHOU CHENGDE STEEL TUBE CO., LTD. Free format text: FORMER OWNER: JIANGSU CHENGDE STEELPIPE CO., LTD. Effective date: 20081024 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20081024 Address after: Jiangsu Province Jiangdu Cheng Road No. 1 Patentee after: Yangzhou Chengde Steel Pipe Co., Ltd. Address before: Jiangsu Province Jiangdu Cheng Road No. 1 Patentee before: Jiangsu Chengde Steelpipe Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060215 Termination date: 20150908 |
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| EXPY | Termination of patent right or utility model |