CN1361084A - Simultaneous process of sintering titanium carbide cermet and welding to steel structure - Google Patents
Simultaneous process of sintering titanium carbide cermet and welding to steel structure Download PDFInfo
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- CN1361084A CN1361084A CN 00136038 CN00136038A CN1361084A CN 1361084 A CN1361084 A CN 1361084A CN 00136038 CN00136038 CN 00136038 CN 00136038 A CN00136038 A CN 00136038A CN 1361084 A CN1361084 A CN 1361084A
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Abstract
The present invention is one simultaneous process of sintering titanium carbide cermet and welding to steel structure. The adhering phase contains Al and Ti in 3-15 weight portions, and the hard phase contains TiC in 50-75 volume portions. The process includes cleaning the surface of structural steel; setting pressed cermet powder compact to the cleaned surface; heating cermet at 300-600 deg.c to eliminate adhesive inside cermet; sintering and welding through raising temperature at the rate of 10-15 deg.c each min and maintaining the temperature; cooling at the rate of 15-20 deg.c each min; and hardening and tempering treamtent. The present invention has high production efficiency and high welding strength and needs no special welding equipment.
Description
The present invention relates to the sintering metal weldprocedure, specifically a kind of sintering titanium carbide cermet while and structure iron weldprocedure.
In the prior art, sintering metal hard phase volume content be 50～75% times except that having ceramic-metallic high-wearing feature, also have can with steel and the comparable fracture toughness property of Wimet, have excellent high temperature resistant, erosion resistance simultaneously, succeed at manufacture fields such as plastics, rubber, food, timber and use.Yet, the same with other Wimet class material, because sintering metal workability poor (grinding and spark processing only), and poor impact resistance, sintering metal adopts soldering to be used in combination with steel when being used for complicated shape and being hit the instrument that uses under the load usually.But sintering metal will be after sintering, to surface mill processing, and then implements soldering, and that braze is generally is Ni-based, copper base or money base scolder.So not only operation is many, production efficiency is low, and need additionally purchase welding set.At present, for cermet material, also find no the people and adopt oversintering and welding to carry out technology simultaneously.
In order to overcome above-mentioned deficiency, the sintering titanium carbide cermet that the purpose of this invention is to provide a kind of production efficiency height, welding strength height, does not need special welding set simultaneously and the structure iron weldprocedure.
To achieve these goals, technical scheme of the present invention is: in order to be adapted to superalloy, to Alloying Design and the hard composition design of TiC mutually of bonding phase chromium nickel Cr; Both to NiCr bonding phase Al, Ti alloying, wherein by weight, content was 3～15 parts in boning mutually for Al, Ti; Regulate the composition of hard phase TiC, count by volume, content is 50～75 parts.
Specific embodiment:
Prime operation: by traditional technology batching, batch mixing, admixture forming agent, granulation, die mould;
In the sintering stage: 1. cleaning structure steel surface, use the acetone scrub before the welding; 2. the metal ceramic powder pressed compact is placed directly on the clean surface of structure iron, the processing lines of face of weld should be consistent with the sintering metal shrinkage direction; 3. sticking to sintering metal row: as under 300～600 ℃ of situations, to remove forming agent; 4. sintered heat insulating: the sticking back of row is raised to sintering temperature with the speed of 10 ℃～15 ℃/min, and the vacuum sintering temperature is controlled in 1340～1360 ℃ of scopes, and insulation realizes that the sintering metal agglomerating is simultaneously integrally welded with structure iron; 5. cooling:, shorten the time of steel in temperature of superheat in sintered heat insulating speed cooling with 15 ℃～20 ℃/min after the stage; 6. modifier treatment: after the quenching, 400～500 ℃ of tempering;
In addition, described structure iron as the welding matrix adopts structural low or soft steel, is specially 40Cr, 30CrNi, 40CrMo, No. 45 steel; Described bonding mutually in by weight, can contain 0.5～5% molybdenum, to improve the wettability of the relative hard phase of bonding; Described sintering metal can be and forms by a firing sample, through surface treatment, again with the structure iron diffusion welding; Described forming agent is paraffin wax, rubber.
Technological principle of the present invention is: metal ceramic powder pressed compact sintering before 1340 ℃ shrinks to be finished substantially, under the sintering metal sintering temperature, the phase transformation of Fe-Ni-Cr-Ti-Al eutectic takes place in sintering metal and steel surface in contact, liquid phase is separated out at the interface, along with the composition diffusion, the development of eutectic phase break-in deep layer, this makes the sintering metal sintering and is welded into possibility simultaneously with steel; After welding finished, sintering metal and structure iron interface formed the excessive layer of the welding of thickness about 15 μ m, and excessively layer is Fe-Ni-Cr-Ti-Al (can contain Mo) graded alloy.Welding strength is about 650MPa, far above common soldering strength (generally about 400MPa).Thisly be welded as a kind of special diffusion welding.Liquid phase does not appear in common diffusion weld interface, by pressurizeing to two welding bodies (contact surface requires very best bright finish) are long-time under vacuum, makes the interface that the composition diffusion take place.
The present invention has following advantage:
The present invention has adjusted hard phase content (hard particles TiC volume content 50-75%) and the middle mutually Al of bonding, Ti alloying element content (wt.3-15%), make sintering metal have excellent mechanical property, wherein Al, Ti not only can adjust sintering temperature, and can make the precipitation strength of bonding phase, make its sintering temperature reduce to 1340-1360 ℃ of scope simultaneously, the phase transformation of Fe-Ni-Cr-Ti-Al eutectic can take place under this temperature, this makes the sintering metal sintering and is welded into possibility simultaneously with steel, because sintering and welding are all carried out in sintering oven, do not need special welding equipment.In addition,, need not pressurize under the vacuum though the present invention is vacuum diffusion welding (not needing scolder), and welding strength very high (reaching 650Mpa).Adopt this technology not only to improve production efficiency, and guaranteed sintering metal and steel welding quality.
Fig. 1 is the synchronous welded construction synoptic diagram of the present invention.
Below in conjunction with drawings and Examples the present invention is described in further detail.
Embodiment 1
As shown in Figure 1, in order to be adapted to superalloy, to bonding phase chromium nickel Cr alloying and hard mutually the TiC composition be designed to: wherein Al, Ti bonding mutually in by weight, content is 4 parts, regulate hard phase TiC and count by volume, content is 50 parts, specific embodiment:
Prime operation: by traditional technology batching, batch mixing, admixture forming agent, granulation, die mould;
In the sintering stage: 1. cleaning structure steel surface, use the acetone scrub before the welding; 2. metal ceramic powder pressed compact 1 is placed directly on the clean surface of structure iron matrix 2, the processing lines of face of weld should be consistent with the sintering metal shrinkage direction; 3. sticking to sintering metal row: as under 300 ℃ of situations, to remove the forming agent paraffin wax; 4. sintered heat insulating: the sticking back of row is raised to sintering temperature with 10 ℃/min speed, and the vacuum sintering temperature is controlled at 1340 ℃, and insulation realizes that the sintering metal agglomerating is simultaneously integrally welded with structure iron; 5. cooling: cool off with 15 ℃/min speed after the stage at sintered heat insulating, shorten the time of steel in temperature of superheat; 6. modifier treatment: after the quenching, 400 ℃ of tempering.
Described structure iron as the welding matrix adopts structural low or soft steel, is specially 40Cr, 30CrNi, 40CrMo, No. 45 steel, and the present invention adopts 40Cr structural low; From the Heat Treatment Of Steel angle, ceramic-metallic sintering temperature is a temperature of superheat to steel, makes the crystal grain of steel thick and ftracture easily when quenching.Experiment shows, low alloy steel such as 40Cr, 30CrNi, 40CrMo, No. 45 steel or low-carbon steel material still can make structure iron have good obdurability by modifier treatment (after the quenching, 400-500 ℃ of tempering) through such after overheated.
Structure iron is except that processing according to tool sizes, shape need, face of weld there is not high request, surface smoothness is getting final product more than 4 grades, use the acetone scrub before the welding, but the processing lines of face of weld should be advisable with the sintering metal shrinkage direction is consistent, sintering metal sintering deflation resistance is little like this, and sintered compact is fine and close and not easy to crack.
Difference from Example 1 is: the present invention to bonding phase chromium nickel Cr alloying and hard mutually the TiC composition be designed to: wherein Al, Ti bonding mutually in by weight, content is 15 parts, regulate hard phase TiC and count by volume, content is 75 parts, in its technological process:
In the sintering stage: 1. cleaning structure steel surface, use the acetone scrub before the welding; 2. the metal ceramic powder pressed compact is placed directly on the clean surface of structure iron, the processing lines of face of weld should be consistent with the sintering metal shrinkage direction; 3. sticking to sintering metal row: as under 600 ℃ of situations, to remove forming agent rubber; 4. sintered heat insulating: the sticking back of row is raised to sintering temperature with 15 ℃/min speed, and the vacuum sintering temperature is controlled at 1350 ℃, and insulation realizes that the sintering metal agglomerating is simultaneously integrally welded with structure iron; 5. cooling: cool off with 17 ℃/min speed after the stage at sintered heat insulating, shorten the time of steel in temperature of superheat; 6. modifier treatment: after the quenching, 450 ℃ of tempering.
Adopt No. 45 low-carbon steel material; Described bonding mutually in by weight, can contain 2.5% molybdenum, to improve the wettability of the relative hard phase of bonding.
Embodiment 3
Difference from Example 1 is:
The present invention to bonding phase chromium nickel Cr alloying and hard mutually the TiC composition be designed to: wherein Al, Ti bonding mutually in by weight, content is 7 parts, regulates hard phase TiC and counts by volume, content is 60 parts, in its technological process:
In the sintering stage: 1. cleaning structure steel surface, use the acetone scrub before the welding; 2. the metal ceramic powder pressed compact is placed directly on the clean surface of structure iron, the processing lines of face of weld should be consistent with the sintering metal shrinkage direction; 3. sticking to sintering metal row: as under 450 ℃ of situations, to remove forming agent rubber; 4. sintered heat insulating: the sticking back of row is raised to sintering temperature with 13 ℃/min speed, and the vacuum sintering temperature is controlled at 1360 ℃, and insulation realizes that the sintering metal agglomerating is simultaneously integrally welded with structure iron; 5. cooling: cool off with 20 ℃/min speed after the stage at sintered heat insulating, shorten the time of steel in temperature of superheat; 6. modifier treatment: after the quenching, 450 ℃ of tempering.
Adopt 30CrNi structural low; Described bonding mutually in by weight, can contain 5 parts molybdenum, to improve the wettability of the relative hard phase of bonding.
In addition, sintering metal of the present invention can be and forms by a firing sample, through surface treatment, again with the structure iron diffusion welding.
Claims (5)
- A sintering titanium carbide cermet simultaneously with the structure iron welding process, it is characterized in that: in order to be adapted to superalloy, to bonding phase chromium nickel Cr alloying and hard mutually the TiC composition be designed to: wherein Al, Ti bonding mutually in by weight, content is 3～15 parts; Regulate hard phase TiC and count by volume, content is 50～75 parts, specific embodiment:Prime operation: by traditional technology batching, batch mixing, admixture forming agent, granulation, die mould;In the sintering stage: 1. cleaning structure steel surface, use the acetone scrub before the welding; 2. the metal ceramic powder pressed compact is placed directly on the clean surface of structure iron, the processing lines of face of weld should be consistent with the sintering metal shrinkage direction; 3. sticking to sintering metal row: as under 300～600 ℃ of situations, to remove forming agent; 4. sintered heat insulating: the sticking back of row is raised to sintering temperature with the speed of 10 ℃～15 ℃/min, and the vacuum sintering temperature is controlled in 1340～1360 ℃ of scopes, and insulation realizes that the sintering metal agglomerating is simultaneously integrally welded with structure iron; 5. cooling:, shorten the time of steel in temperature of superheat in sintered heat insulating speed cooling with 15 ℃～20 ℃/min after the stage; 6. modifier treatment: after the quenching, 400～500 ℃ of tempering.
- 2. according to described sintering titanium carbide cermet while of claim 1 and structure iron welding process, it is characterized in that: described structure iron as the welding matrix adopts structural low or soft steel, is specially 40Cr, 30CrNi, 40CrMo, No. 45 steel.
- 3. according to the described sintering titanium carbide cermet of claim 1 simultaneously and the structure iron welding process, it is characterized in that: described bonding mutually in by weight, can contain 0.5～5 part molybdenum, to improve the wettability of the relative hard phase of bonding.
- 4. according to described sintering titanium carbide cermet while of claim 1 and structure iron welding process, it is characterized in that: described sintering metal can be and forms by a firing sample, through surface treatment, again with the structure iron diffusion welding.
- 5. according to described sintering titanium carbide cermet while of claim 1 and structure iron welding process, it is characterized in that: described forming agent is paraffin wax, rubber.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 00136038 CN1184168C (en) | 2000-12-29 | 2000-12-29 | Simultaneous process of sintering titanium carbide cermet and welding to steel structure |
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| CN 00136038 CN1184168C (en) | 2000-12-29 | 2000-12-29 | Simultaneous process of sintering titanium carbide cermet and welding to steel structure |
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| CN1361084A true CN1361084A (en) | 2002-07-31 |
| CN1184168C CN1184168C (en) | 2005-01-12 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1321945C (en) * | 2004-12-08 | 2007-06-20 | 中国科学院金属研究所 | Preparation method of plastic pelletizing template having large size metal ceramic composite material sheet |
| CN100348757C (en) * | 2004-12-14 | 2007-11-14 | 中国科学院金属研究所 | Corrosion- and wear- proof metal ceramic composite material plastic pelletizing knife |
| CN100348758C (en) * | 2004-12-14 | 2007-11-14 | 中国科学院金属研究所 | Wear- and corrosion- proof metal ceramic knife edge material |
| CN101580404B (en) * | 2008-05-12 | 2011-08-03 | 铜陵市红星水暖有限责任公司 | Manufacturing method of copper-plated porcelain |
| CN105772717A (en) * | 2009-09-23 | 2016-07-20 | Gkn 金属烧结控股有限责任公司 | Method for producing a green compact |
| CN108866494A (en) * | 2018-07-27 | 2018-11-23 | 合肥岑遥新材料科技有限公司 | A method of improving metal matrix ceramic composites wearability |
| CN112342436A (en) * | 2020-10-21 | 2021-02-09 | 吉林大学 | Nanoparticle reinforced ZTC4 titanium alloy and preparation method thereof |
-
2000
- 2000-12-29 CN CN 00136038 patent/CN1184168C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1321945C (en) * | 2004-12-08 | 2007-06-20 | 中国科学院金属研究所 | Preparation method of plastic pelletizing template having large size metal ceramic composite material sheet |
| CN100348757C (en) * | 2004-12-14 | 2007-11-14 | 中国科学院金属研究所 | Corrosion- and wear- proof metal ceramic composite material plastic pelletizing knife |
| CN100348758C (en) * | 2004-12-14 | 2007-11-14 | 中国科学院金属研究所 | Wear- and corrosion- proof metal ceramic knife edge material |
| CN101580404B (en) * | 2008-05-12 | 2011-08-03 | 铜陵市红星水暖有限责任公司 | Manufacturing method of copper-plated porcelain |
| CN105772717A (en) * | 2009-09-23 | 2016-07-20 | Gkn 金属烧结控股有限责任公司 | Method for producing a green compact |
| CN108866494A (en) * | 2018-07-27 | 2018-11-23 | 合肥岑遥新材料科技有限公司 | A method of improving metal matrix ceramic composites wearability |
| CN112342436A (en) * | 2020-10-21 | 2021-02-09 | 吉林大学 | Nanoparticle reinforced ZTC4 titanium alloy and preparation method thereof |
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| CN1184168C (en) | 2005-01-12 |
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Application publication date: 20020731 Assignee: Jinfeng Special Tool Co., Ltd., Shenyang Assignor: Institute of metal research, Chinese Academy of Sciences Contract record no.: 2013210000045 Denomination of invention: Simultaneous process of sintering titanium carbide cermet and welding to steel structure Granted publication date: 20050112 License type: Exclusive License Record date: 20130515 |
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Granted publication date: 20050112 Termination date: 20131229 |