CN1727502A - Crl2MoV steel forging method - Google Patents
Crl2MoV steel forging method Download PDFInfo
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- CN1727502A CN1727502A CN 200410035455 CN200410035455A CN1727502A CN 1727502 A CN1727502 A CN 1727502A CN 200410035455 CN200410035455 CN 200410035455 CN 200410035455 A CN200410035455 A CN 200410035455A CN 1727502 A CN1727502 A CN 1727502A
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- forging
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- 238000005242 forging Methods 0.000 title claims abstract description 82
- 238000000034 method Methods 0.000 title claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 13
- 239000010959 steel Substances 0.000 title claims abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 5
- 238000010792 warming Methods 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 abstract description 4
- 230000009466 transformation Effects 0.000 abstract description 3
- 238000000265 homogenisation Methods 0.000 abstract 1
- 238000004321 preservation Methods 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000000465 moulding Methods 0.000 description 11
- 230000003245 working effect Effects 0.000 description 7
- 238000009826 distribution Methods 0.000 description 6
- 229910001349 ledeburite Inorganic materials 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 150000001247 metal acetylides Chemical class 0.000 description 4
- 229910001566 austenite Inorganic materials 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
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Abstract
The invention discloses a forging method of Cr12MoV steel, which comprises a treatment process of heating homogenization, forging deformation and cooling after forging, and is characterized by comprising the following steps of: heating and homogenizing. (2) And (5) forging and deforming. (3) And cooling after forging. The temperature range, the temperature change speed and the heat preservation time are strictly controlled in each step. The forging method of the Cr12MoV steel does not need technical transformation investment; the forging deformation and the size of the forging are not limited; the finished product rate of the forging can reach more than 95%, and the key quality index of the forging, namely the unevenness of carbide, can reach 1-2 level specified by GB 14979-1994 standard; compared with the tool and die manufactured by the traditional forge piece, the service life of the tool and die manufactured by the forge piece is at least prolonged by 1 time.
Description
Technical field
The present invention relates to forging production method, the especially forging method of cold-work die steel Cr12MoV steel of metallurgy industry and die industry Cr12 type worker mould steel.
Background technology
The Cr12MoV cold-work die steel can not only bear heavier load, also has high wear resistance, the while low price, therefore be widely used in making moulding stock such as cold-punching mould, cold heading die, cold extruding die, wortle, thread rolling die, but also be used to make the molding roller of stainless steel and non-ferrous metal.The basic cast structure of Cr12MoV is the ledeburite+martensite along casting crystal boundary net distribution.In forging process, if Heating temperature is too high, ledeburite melts, and becomes liquid, causes the material burning, can not forging molding.Present Forge Heating temperature is generally about 1000 ℃, it is ledeburite+austenite two-phase region casting, but because netted ledeburite contains a large amount of brittle carbides, cause forging deformation cracking easily, thereby extremely difficult forging molding, the key reason that is to say extremely difficult forging molding is the carbide in the ledeburite of net distribution, under this forging temperature, matrix is the higher austenite of plasticity, is the very big carbide of fragility around these austenite particulate, is difficult to forging deformation so naturally.Its yield rate of the forging of moulding is very low in this way, though moulding do not pass through sufficient forging deformation yet, that is to say that the net distribution form of ledeburite does not have wide variation, so it is very low naturally work-ing life to be used in the tool and mould that this forging produces.According to investigations, the forging of domestic Cr12MoV steel and processing mold manufacturing factory, all exist and forge modification difficulty and tool and mould short these two difficult problems in work-ing life, tool and mould work-ing life is short then forges the modification difficulty and causes that distribution of carbides is inhomogeneous to be caused, so the forging deformation difficulty becomes the bottle footpath that this material uses.Country such as Japan, Germany, France uses special-purpose forging equipment, Russia is except that using special forging equipment, also use the super method for forging and molding of moulding to solve this problem of forging deformation difficulty, the instrument moulding is not regular for Cr12MoV forging that therefore external ox produces or tool and mould, and be several times to tens times of home products work-ing life, but these special forging equipment investment costs are big, and the super forging method of moulding is difficult to grasp.
Summary of the invention
The object of the present invention is to provide a kind of forging method of Cr12MoV steel, this method not only can thoroughly be eliminated the harm of carbide network to forgeability, make forging can carry out abundant forging deformation, the carbide unevenness of material is brought up to below 2 grades by the 5-8 level before forging, thereby make improve several times to tens times the work-ing life of tool and mould, and this method facility investment is little, need not a large amount of technological transformation funds, can reduce production costs.
For reaching above purpose, the technical solution adopted in the present invention is: the forging method of this Cr12MoV steel, comprise it is characterized in that the treatment process of " adding thermally homogenising+forging deformation+forging postcooling ", and the steps include:
(1) add thermally homogenising: forging stock is warmed up to 700-800 ℃ with stove, is incubated 1-2 hour; With the heat-up rate of 50-100 ℃/h, be warming up to 1000-1300 ℃ again, be incubated 2-3 hour, between soak forging stock is stood up, to reduce the male and female face temperature head.
(2) forging deformation: open and forge 1000-1300 ℃ of temperature, final forging temperature 900-950 ℃, upsetting pull is 4-5 time repeatedly, makes forging ratio＞8; When the forging temperature is lower than 900-950 ℃ of scope, be heated 1000-1300 ℃, be incubated and forge again after 2-3 hour.
(3) forge postcooling: the cooling rate with 30 ℃/h is cooled to 100 ℃ with forging.
Beneficial effect of the present invention is: need not investment in technological transformation; To forging deformation amount and forging ' s block dimension without limits; The yield rate of forging can reach more than 95%, the forging Key Quality Indicator, and promptly the carbide unevenness can reach the 1-2 level of GB14979-1994 standard code; Compare with the tool and mould of traditional forging manufacturing work-ing life with the tool and mould of this forging manufacturing and to improve 1 times at least.
Specific embodiment
Embodiment 1
Use the present invention, adopt the Cr12MoV steel casting that adds thermally homogenising, forging deformation, forging postcooling three step forgings, 60 * 60 * 150mm and 200 * 200 * 200mm, the steps include: 1, add thermally homogenising: forging stock is warming up to 750 ℃ with stove, is incubated 1.5 hours; With the heat-up rate of 95 ℃/h, be warming up to 1150 ℃ again, be incubated 2-3 hour, between soak forging stock is stood up 2 times.2, forging deformation: open and forge 1150 ℃ of temperature, 900 ℃ of final forging temperatures; Upsetting pull is 4 times repeatedly, makes forging ratio＞8, and when 900 ℃ of forging temperature, reheat to 1150 ℃ was incubated after 2-3 hour, forged again.3, forge postcooling: the cooling rate with 30 ℃/h is cooled to 100 ℃, is finished product.Through check, this finished product forging deformation ability is as good as with general structural carbon steel, through the low power inspection, and forging macrostructure uniform and delicate, all flawless; Press the GB14979-1994 standard rating, the carbide unevenness reaches the 1-2 level.
Embodiment 2
Adopt step with embodiment 1.For each 50 of the cake spares of the ring body of certain mould factory success forging external diameter 310mm, internal diameter 210mm, high 90mm and external diameter 180mm, high 80mm, be used for the manufacturing of trombone slide mould.Its yield rate is 98%; Forging is pressed the GB14979-1994 standard rating, and the carbide unevenness is by 7 grades before forging 1.5 grades of bringing up to after the forging; Be 3 times of other producers the work-ing life of mould.
Embodiment 3
Adopt step with embodiment 1.Be 5 of the templates of success forging 1500 * 800 * 100mm of certain machine works.Its yield rate is 100%; Forging is pressed the GB14979-1994 standard rating, and the carbide unevenness is by 8 grades before forging 2 grades of bringing up to after the forging; Other producers can only accomplish the 6-7 level, and yield rate is less than 50%.
Description of drawings
Fig. 1 is distribution of carbides figure before embodiment 3 forges, and is 8 grades by the GB14979-1994 standard rating.
Fig. 2 is that embodiment 3 forges back distribution of carbides figure, is 2 grades by the GB14979-1994 standard rating.
Claims (1)
1, a kind of forging method of Cr12MoV steel comprises it is characterized in that the treatment process of " adding thermally homogenising+forging deformation+forging postcooling ", the steps include:
(1) add thermally homogenising: forging stock is warmed up to 700-800 ℃ with stove, is incubated 1-2 hour; With the heat-up rate of 50-100 ℃/h, be warming up to 1000-1300 ℃ again, be incubated 2-3 hour, between soak forging stock is stood up.
(2) forging deformation: open and forge 1000-1300 ℃ of temperature, final forging temperature 900-950 ℃, upsetting pull is 4-5 time repeatedly, makes forging ratio＞8; When the forging temperature is lower than 900-950 ℃ of scope, be heated 1000-1300 ℃, be incubated and forge again after 2-3 hour.
(3) forge postcooling: the cooling rate with 30 ℃/h is cooled to 100 ℃ with forging.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410035455 CN1727502A (en) | 2004-07-29 | 2004-07-29 | Crl2MoV steel forging method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410035455 CN1727502A (en) | 2004-07-29 | 2004-07-29 | Crl2MoV steel forging method |
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| CN1727502A true CN1727502A (en) | 2006-02-01 |
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| CN 200410035455 Pending CN1727502A (en) | 2004-07-29 | 2004-07-29 | Crl2MoV steel forging method |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100431736C (en) * | 2006-12-08 | 2008-11-12 | 鞍山市腾鳌特区金钢大型锻造厂 | SAE6427 steel forging heating process |
| CN102218493A (en) * | 2011-05-13 | 2011-10-19 | 无锡市乾丰锻造有限公司 | Square steel forging process |
| CN102218492A (en) * | 2011-05-13 | 2011-10-19 | 无锡市乾丰锻造有限公司 | Square steel production method |
| CN102350476A (en) * | 2011-08-04 | 2012-02-15 | 攀钢集团江油长城特殊钢有限公司 | Method for manufacturing large cake forgings of high-carbon and high-chromium cold working die steel |
| CN102756070A (en) * | 2012-07-18 | 2012-10-31 | 浙江天马轴承股份有限公司 | Forging method of bearing ring |
| CN103173597A (en) * | 2013-02-28 | 2013-06-26 | 辽宁金钢重型锻造有限公司 | Method for improving optional performances of large H13 steel hot-extrusion mould |
| CN104014703A (en) * | 2014-06-16 | 2014-09-03 | 安徽省瑞杰锻造有限责任公司 | Forging process for C12MoV twisting rollers |
| CN104259360A (en) * | 2014-07-29 | 2015-01-07 | 张家港市广大机械锻造有限公司 | Heating process of Cr9SiMn bearing steel before forging |
| CN105950848A (en) * | 2016-06-20 | 2016-09-21 | 安徽省瑞杰锻造有限责任公司 | Forging technology of Cr 12 annular forging piece |
| CN105945186A (en) * | 2016-05-14 | 2016-09-21 | 莱芜锻压有限公司 | High-carbon and high-chromium cold roll forging technology adopting diffusion during forging |
| CN106040933A (en) * | 2016-06-20 | 2016-10-26 | 安徽省瑞杰锻造有限责任公司 | Forging process for Cr12MoV trestle reaming forge piece |
| CN106077378A (en) * | 2016-06-20 | 2016-11-09 | 安徽省瑞杰锻造有限责任公司 | A kind of forging processing technique of Cr12MoV steel |
| CN106424524A (en) * | 2016-10-14 | 2017-02-22 | 太原科技大学 | Method for forging 17CrNiMo6 steel wind power generation gear |
| CN106734800A (en) * | 2016-12-22 | 2017-05-31 | 潘承民 | A kind of stainless steel knife forging technology |
| CN106868258A (en) * | 2017-03-03 | 2017-06-20 | 西京学院 | A kind of high-carbon chromium steel carbide superfining handling process |
| CN107442721A (en) * | 2017-06-13 | 2017-12-08 | 江苏森威精锻有限公司 | A kind of warm and hot forging technique of mould |
| CN108987843A (en) * | 2018-09-29 | 2018-12-11 | 南通志乐新材料有限公司 | A kind of new energy car battery recyclable device |
| CN108994229A (en) * | 2018-07-16 | 2018-12-14 | 成都先进金属材料产业技术研究院有限公司 | Manufacturing method for cold-working mold thickness band steel |
| CN109055850A (en) * | 2018-08-30 | 2018-12-21 | 成都先进金属材料产业技术研究院有限公司 | Improve the preparation method of cold work die steel eutectic carbide |
| CN113145777A (en) * | 2020-12-31 | 2021-07-23 | 无锡派克新材料科技股份有限公司 | Manufacturing method for improving strength and low-temperature impact property of austenite ferrite duplex stainless steel |
| CN114749592A (en) * | 2022-04-18 | 2022-07-15 | 重庆新承航锐科技股份有限公司 | Method for eliminating 9Cr18 martensitic stainless steel network carbide |
-
2004
- 2004-07-29 CN CN 200410035455 patent/CN1727502A/en active Pending
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100431736C (en) * | 2006-12-08 | 2008-11-12 | 鞍山市腾鳌特区金钢大型锻造厂 | SAE6427 steel forging heating process |
| CN102218493A (en) * | 2011-05-13 | 2011-10-19 | 无锡市乾丰锻造有限公司 | Square steel forging process |
| CN102218492A (en) * | 2011-05-13 | 2011-10-19 | 无锡市乾丰锻造有限公司 | Square steel production method |
| CN102350476A (en) * | 2011-08-04 | 2012-02-15 | 攀钢集团江油长城特殊钢有限公司 | Method for manufacturing large cake forgings of high-carbon and high-chromium cold working die steel |
| CN102756070A (en) * | 2012-07-18 | 2012-10-31 | 浙江天马轴承股份有限公司 | Forging method of bearing ring |
| CN103173597A (en) * | 2013-02-28 | 2013-06-26 | 辽宁金钢重型锻造有限公司 | Method for improving optional performances of large H13 steel hot-extrusion mould |
| CN103173597B (en) * | 2013-02-28 | 2014-05-07 | 辽宁金钢重型锻造有限公司 | Method for improving optional performances of large H13 steel hot-extrusion mould |
| CN104014703A (en) * | 2014-06-16 | 2014-09-03 | 安徽省瑞杰锻造有限责任公司 | Forging process for C12MoV twisting rollers |
| CN104259360A (en) * | 2014-07-29 | 2015-01-07 | 张家港市广大机械锻造有限公司 | Heating process of Cr9SiMn bearing steel before forging |
| CN105945186A (en) * | 2016-05-14 | 2016-09-21 | 莱芜锻压有限公司 | High-carbon and high-chromium cold roll forging technology adopting diffusion during forging |
| CN105950848A (en) * | 2016-06-20 | 2016-09-21 | 安徽省瑞杰锻造有限责任公司 | Forging technology of Cr 12 annular forging piece |
| CN106040933A (en) * | 2016-06-20 | 2016-10-26 | 安徽省瑞杰锻造有限责任公司 | Forging process for Cr12MoV trestle reaming forge piece |
| CN106077378A (en) * | 2016-06-20 | 2016-11-09 | 安徽省瑞杰锻造有限责任公司 | A kind of forging processing technique of Cr12MoV steel |
| CN106424524A (en) * | 2016-10-14 | 2017-02-22 | 太原科技大学 | Method for forging 17CrNiMo6 steel wind power generation gear |
| CN106734800A (en) * | 2016-12-22 | 2017-05-31 | 潘承民 | A kind of stainless steel knife forging technology |
| CN106868258A (en) * | 2017-03-03 | 2017-06-20 | 西京学院 | A kind of high-carbon chromium steel carbide superfining handling process |
| CN107442721A (en) * | 2017-06-13 | 2017-12-08 | 江苏森威精锻有限公司 | A kind of warm and hot forging technique of mould |
| CN108994229A (en) * | 2018-07-16 | 2018-12-14 | 成都先进金属材料产业技术研究院有限公司 | Manufacturing method for cold-working mold thickness band steel |
| CN109055850A (en) * | 2018-08-30 | 2018-12-21 | 成都先进金属材料产业技术研究院有限公司 | Improve the preparation method of cold work die steel eutectic carbide |
| CN108987843A (en) * | 2018-09-29 | 2018-12-11 | 南通志乐新材料有限公司 | A kind of new energy car battery recyclable device |
| CN113145777A (en) * | 2020-12-31 | 2021-07-23 | 无锡派克新材料科技股份有限公司 | Manufacturing method for improving strength and low-temperature impact property of austenite ferrite duplex stainless steel |
| CN114749592A (en) * | 2022-04-18 | 2022-07-15 | 重庆新承航锐科技股份有限公司 | Method for eliminating 9Cr18 martensitic stainless steel network carbide |
| CN114749592B (en) * | 2022-04-18 | 2024-01-02 | 重庆新承航锐科技股份有限公司 | Method for eliminating 9Cr18 martensitic stainless steel net-shaped carbide |
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