CN1031864A - A kind of Steel Bond Hard Alloy and manufacture craft thereof - Google Patents
A kind of Steel Bond Hard Alloy and manufacture craft thereof Download PDFInfo
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- CN1031864A CN1031864A CN 88105759 CN88105759A CN1031864A CN 1031864 A CN1031864 A CN 1031864A CN 88105759 CN88105759 CN 88105759 CN 88105759 A CN88105759 A CN 88105759A CN 1031864 A CN1031864 A CN 1031864A
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Abstract
The present invention relates to GT35 Steel Bond Hard Alloy and manufacturing process thereof, and purpose is for providing an ideal moulding stock.Refractory materials forming mould particularly, demanding wear resistance and high hardness and intensity, and the GT35 Steel Bond Hard Alloy is to be the bonding phase with the steel, with the titanium carbide is the Wimet composition material of hard phase, has the favorable mechanical performance, high rigidity, high-wearing feature, high intensity, high rigidity and toughness.And has a good operational characteristic.
Description
The present invention relates to a kind of Steel Bond Hard Alloy and manufacture craft thereof, particularly GT35 Steel Bond Hard Alloy and manufacture craft thereof.
Industrial expansion needs various tool steel and die steel, the development of Iron And Steel Industry requires to improve day by day to refractory quality, it is short work-ing life that domestic for a long time refractory industry exists forming mould, the steel consumption is big, the die cost height, Mould Machining does not catch up with the needs of production development, and Ministry of Metallurgical Industry attaches great importance to this problem of mould for this reason.Ministry of Metallurgical Industry was and Italian wolfram varbide company bargaining in 1979, but every pair of mould is charged 9300 dollars, and price is too high does not reach an agreement, and followed the back in Shanghai Refractory Material Factory's tackling key problem, adopted gas carbonitriding thermal treatment process Cr
12The Mor high alloy has just been made mould, adopts tungsten-cobalt hard alloy empiecement to glue the iron chains mould simultaneously, on work-ing life, improve a lot, but processing difficulties, use range is restricted.
The object of the present invention is to provide a kind of high rigidity that has, high-wearing feature and higher intensity are convenient to steel-bonded carbide material and the manufacture craft thereof that machining can be made various complicated dies.
The invention provides a kind of after heat treatment have high rigidity, high-wearing feature and high intensity certain toughness and good operational characteristic, this material can adapt to various machinings, energy forges, welds, after heat treatment is out of shape little, its mechanical property, density 6.4～6.6g/cm
3, hardness HRC39～45 after annealing, quenching hardness HRC67～72, bending strength 150～180kg/mm
2, ultimate compression strength＞300kg/mm
2, impelling strength 0.6～0.9kgm/cm
2, be convenient to machining and can make all kinds of moulds such as special, big, special-shaped refractory materials forming mould and cold drawn, cold group, punching press, shearing owing to have this material of above-mentioned performance.The GT35 Steel Bond Hard Alloy is to be that bonding is the Wimet composition material of hard phase with the titanium carbide with the steel.
Below in conjunction with accompanying drawing and example content of the present invention is described in further detail, is described as follows:
Fig. 1 is heating in the forging figure of the present invention.
Fig. 2 is annealing heating process figure of the present invention.
Fig. 3 is quenching heating process figure of the present invention.
Fig. 4 is tempering heating process figure of the present invention.
Fig. 5 is a carbon of the present invention, the nitrogen binary is oozed altogether or carbon, nitrogen, the ternary co-osmosized thermal treatment process figure of boron.
GT35 Steel Bond Hard Alloy making method and technical process: alloy sintering blank → annealing → forging → annealing → machining → quenching (thermo-chemical treatment) → tempering → ground finish → assembling → finished product.Division is as follows:
One, GT35 Steel Bond Hard Alloy Chemical Composition and forging processing.
The GT35 Steel Bond Hard Alloy is a kind of composition material that adopts powder metallurgy process to produce, and its blank forms through the vacuum oven sintering, its Chemical Composition, titanium carbide TiC35%, molybdenum Mo2%, inscription Cr2%, carbon C0.5%, iron Fe surplus.Its steel matrix type belongs to inscription, molybdenum Medium Alloy Steel.
Before the forging, earlier the blank surface impurity is ground off (polishing) right fed to boiler heating, forge its technology as shown in Figure 1.Need strict especially control initial forging temperature (1200 °～1220 ℃) and final forging temperature (900 °～950 ℃), when first fire forges, at first blank bevelling, little angle are reheated after tying, second fire bevelling, chamfering reforge is repeatedly dialled long, dialling must be from first to last when long, can not reforge workpiece centre position, otherwise crack.The 3rd fire bevelling chamfering is repeatedly dialled longly until reaching the desired shape size, and the blank of forging after good must be incubated cooling or furnace cooling, otherwise unfavorable to annealing and machining, hardness is higher.
Two, the thermal treatment of GT35 Steel Bond Hard Alloy comprises annealing, quenches and the changeization processing drawing process.The thermal treatment purpose of steel-bonded carbide and technology such as following:
1, the annealed purpose is to make it can bear various machinings and other complete processings in order to reduce hardness of alloy; GT35 steel-bonded carbide weave construction behind sintering often is a nodular troostite; its hardness higher (HRC50～60); forge back hardness higher (HRC60～62); therefore must be 360 °～880 ℃ annealing; referring to Fig. 2; because GT35 steel-bonded carbide annealing process requires high; cycle is long; must adopt sfgd.s such as charcoal or cast iron filing for preventing decarburization; annealing back tapping temperature is controlled at 200 °～250 ℃, otherwise causes the higher unfavorable processing of hardness.
2, quenching purpose is to improve GT35 hardness of alloy, intensity, performance such as wear-resisting and anticorrosive.Equipment for Heating Processing can adopt box-type furnace, salt bath salt, well formula gas stove etc., its quenching technology as shown in Figure 3, quenchant can adopt No. 2, No. 3 spindle oil or No. 30, No. 45 machine oil, during quenching oil temperature must be heated to 30 °～50 ℃, otherwise can cause the cracking.Its metallurgical structure of the steel-bonded carbide of as-quenched condition often is: TiC+ martensite.
3, tempering purpose is to eliminate quenching stress, stable organizational structure, raising toughness etc. are so that obtain good comprehensive mechanical performance, the GT35 alloy quenches, and hardness reduces its hardness of back with the rising of tempering temperature, the then corresponding raising of its toughness, therefore the selection of tempering temperature will be decided according to concrete purposes, is used for its tempering temperature of mould and adopts 160 °～200 ℃ of low-temperaturetemperings, and its tempering process as shown in Figure 4.The tempered structure feature, low-temperaturetempering TiC+ tempered martensite+carbide, high tempering TiC+ sorbite (or troostite)+carbide.
4; surface chemistry thermal treatment; in order to obtain the superabrasive layer and the property on surface; can adopt carbon to the refractory materials forming mould; nitrogen binary confusion technology or carbon; nitrogen; the ternary co-osmosized technology of boron; its technology as shown in Figure 5 when adopting well formula gas stove to heat-treat; in the time of 800 ℃, splash into 120～150 droplets/minute of methyl alcohol; (methyl alcohol is 80～100 droplets/minute during 2～3mm860 °～980 ℃ of water dropper φ for 80～120 droplets/minute of ethanol; ethanol adds 100～120 droplets/minute of the dried solution of boron; 80～120.0 droplets/minute of ammonia 30～35 millimeter water column or trolamines; when heating is more than 700 ℃, must add shielding gas in a word, in order to avoid oxidation and decarbonization.
Three, the machining of GT35 steel-bonded carbide and the application on the refractory materials forming mould:
The steel-bonded carbide of annealed state can carry out various machinings, adopts yH during its turning
2Cutter ycog etc. all can, dry state adds cooling fluid otherwise hardness increases unfavorable processing suddenly during turning, it is good can adopting following prescription cooling fluid to quenching annealed part during ground finish, its cooling liquid formulation is for adding 0.2～0.7 gram borax in 100 gram water, 0.2～0.5 gram three second are joined amine, 0.1 gram left and right sides Sodium Nitrite.Preferably adopt the JRl diamond wheel during to the GT35 alloy grinding of as-quenched condition, speed is that 0.01～0.02mm is good with 15～25 meter per second feeding depths.
The refractory materials forming mould is generally formed housing and template housing by 45 by two portions
#Cast steel is made, and template adopts high inscription cast alloy iron and GT35 alloy sheets to inlay to form its technical process and is:
The GT35 alloy inlays → finish grindes with high inscription alloy templates → assembles.
Claims (6)
1, the present invention relates to Steel Bond Hard Alloy, particularly GT35 type bond hard alloy is characterized in that adopting powder metallurgy process to produce, mainly the inscription molybdenum Medium Alloy Steel that is formed by repressed sintering of component such as titanium carbide, molybdenum, inscription, carbon, iron.This material has high rigidity, high-wearing feature, high rigidity and higher intensity and toughness after carbon, nitrogen, boron co-diffusion thermal treatment, good machinability and characteristic such as anticorrosive.This material can be made complicated special, big, special-shaped refractory materials forming mould and broad variety mould such as cold-punching mould, wortle etc.The GT35 Steel Bond Hard Alloy is to be the bonding phase with the steel, is the Wimet composition material of hard phase with titanium carbide (or wolfram varbide).
2, Steel Bond Hard Alloy according to claim 1, the Chemical Composition content that it is characterized in that alloy be promptly: titanium carbide TiC35%, molybdenum Mo2%, inscription Cr2%, carbon C0.5% iron Fe surplus.
3, Steel Bond Hard Alloy according to claim 1, its mechanical property is: density is 6.4～6.6g/cm
3, annealing hardness HRc39～45, quenching hardness HRc67～72, bending strength 150～180kg/mm
2, ultimate compression strength＞300kg/mm
2, impelling strength 0.6～0.9kg/cm
2, also have good characteristics such as machining.
4, a kind of making method of Steel Bond Hard Alloy is characterized in that thermal treatment employing carbon, nitrogen, the ternary co-osmosized technology of boron, its technical process: steel-bonded carbide sintering blank → annealing → heats forged → Spheroidizing Annealing → machining → quenching → tempering.
5, according to the manufacture craft of the described Steel Bond Hard Alloy of claim 4, the control that it is characterized in that forging temperature and thermal treatment temp is promptly: initial forging temperature is at 1200 °～1220 ℃, final forging temperature is at 900 °～950 ℃, 860 °～880 ℃ of heat-treatment of annealing temperature, annealing tapping temperature quenches 960 °～1050 ℃ at 200 °～250 ℃, is incubated 1.5～2 hours, oil temperature heating 30～50C during quenching, about 160 °～200 ℃ of the tempering temperatures of mould.
6, the Steel Bond Hard Alloy of handling according to claim 4 or 5 described methods, it is characterized in that this alloy organizing feature sintering state TiC+ bainite, as-annealed condition TiC+ nodularization body, as-quenched condition TiC+ martensite, low-temperaturetempering state TiC+ tempered martensite+carbide, high tempering state TiC+ sorbite (or troostite)+carbide.
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| CN 88105759 CN1031864A (en) | 1988-08-01 | 1988-08-01 | A kind of Steel Bond Hard Alloy and manufacture craft thereof |
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| CN 88105759 CN1031864A (en) | 1988-08-01 | 1988-08-01 | A kind of Steel Bond Hard Alloy and manufacture craft thereof |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1042242C (en) * | 1995-09-21 | 1999-02-24 | 左其福 | Prodn. method of melt-casting carbide steel |
| CN101882505A (en) * | 2010-04-08 | 2010-11-10 | 广元瑞峰精工机械制造有限公司 | Improvement structure of slight structure precision mold |
| CN102389969A (en) * | 2011-12-05 | 2012-03-28 | 北京工商大学 | Powder metallurgical material for cold stamping mold and mold forming method using same |
| CN102773399A (en) * | 2012-07-12 | 2012-11-14 | 海盐三马标准件有限公司 | Machining process of engineering machinery crawler belt nut |
| CN102828105A (en) * | 2011-06-18 | 2012-12-19 | 无锡鑫群新材料科技有限公司 | Titanium-carbide-based steel-bonded cemented carbide material and preparation method thereof |
| CN104195407A (en) * | 2014-09-23 | 2014-12-10 | 江苏汇诚机械制造有限公司 | Preparation method of TiC high-manganese steel based steel bond hard alloy |
| CN104399765A (en) * | 2014-10-30 | 2015-03-11 | 苏州广型模具有限公司 | Novel wire drawing die core |
| CN105525201A (en) * | 2016-03-02 | 2016-04-27 | 李逸博 | Gas bearing for high-precision gyroscope in car navigation system |
| CN105689723A (en) * | 2016-02-19 | 2016-06-22 | 郭金艳 | Automobile steering-gear cylinder barrel |
| CN105734379A (en) * | 2016-03-02 | 2016-07-06 | 李逸博 | Injection mold core |
| CN105970064A (en) * | 2016-02-04 | 2016-09-28 | 株洲硬质合金集团有限公司 | Steel bonded hard alloy and preparation method thereof |
| CN106732180A (en) * | 2016-11-29 | 2017-05-31 | 江苏鸿舜生物能源开发有限公司 | A kind of biomass granulation machine ring mould and preparation method thereof |
| CN107116266A (en) * | 2016-02-24 | 2017-09-01 | 钟苗 | A kind of machining broaching tool |
| CN108118123A (en) * | 2018-03-02 | 2018-06-05 | 陕西航天时代导航设备有限公司 | GT35 precision assembly part depositing TiN film layer processes |
| CN108978791A (en) * | 2018-06-26 | 2018-12-11 | 苏州海马消防设备制造有限公司 | A kind of composite material fire water box |
| CN111112383A (en) * | 2019-12-30 | 2020-05-08 | 中钢集团邢台机械轧辊有限公司 | High wear-resisting combined coiler side guide plate |
-
1988
- 1988-08-01 CN CN 88105759 patent/CN1031864A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1042242C (en) * | 1995-09-21 | 1999-02-24 | 左其福 | Prodn. method of melt-casting carbide steel |
| CN101882505A (en) * | 2010-04-08 | 2010-11-10 | 广元瑞峰精工机械制造有限公司 | Improvement structure of slight structure precision mold |
| CN102828105A (en) * | 2011-06-18 | 2012-12-19 | 无锡鑫群新材料科技有限公司 | Titanium-carbide-based steel-bonded cemented carbide material and preparation method thereof |
| CN102828105B (en) * | 2011-06-18 | 2015-01-07 | 无锡鑫群新材料科技有限公司 | Preparation method of titanium-carbide-based steel-bonded cemented carbide material |
| CN102389969A (en) * | 2011-12-05 | 2012-03-28 | 北京工商大学 | Powder metallurgical material for cold stamping mold and mold forming method using same |
| CN102773399A (en) * | 2012-07-12 | 2012-11-14 | 海盐三马标准件有限公司 | Machining process of engineering machinery crawler belt nut |
| CN104195407A (en) * | 2014-09-23 | 2014-12-10 | 江苏汇诚机械制造有限公司 | Preparation method of TiC high-manganese steel based steel bond hard alloy |
| CN104399765A (en) * | 2014-10-30 | 2015-03-11 | 苏州广型模具有限公司 | Novel wire drawing die core |
| CN105970064A (en) * | 2016-02-04 | 2016-09-28 | 株洲硬质合金集团有限公司 | Steel bonded hard alloy and preparation method thereof |
| CN105689723A (en) * | 2016-02-19 | 2016-06-22 | 郭金艳 | Automobile steering-gear cylinder barrel |
| CN107116266A (en) * | 2016-02-24 | 2017-09-01 | 钟苗 | A kind of machining broaching tool |
| CN105525201A (en) * | 2016-03-02 | 2016-04-27 | 李逸博 | Gas bearing for high-precision gyroscope in car navigation system |
| CN105734379A (en) * | 2016-03-02 | 2016-07-06 | 李逸博 | Injection mold core |
| CN106732180A (en) * | 2016-11-29 | 2017-05-31 | 江苏鸿舜生物能源开发有限公司 | A kind of biomass granulation machine ring mould and preparation method thereof |
| CN108118123A (en) * | 2018-03-02 | 2018-06-05 | 陕西航天时代导航设备有限公司 | GT35 precision assembly part depositing TiN film layer processes |
| CN108978791A (en) * | 2018-06-26 | 2018-12-11 | 苏州海马消防设备制造有限公司 | A kind of composite material fire water box |
| CN111112383A (en) * | 2019-12-30 | 2020-05-08 | 中钢集团邢台机械轧辊有限公司 | High wear-resisting combined coiler side guide plate |
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