CN105728979B - Strengthen the method on hot forming dies materials surface using welding wire - Google Patents
Strengthen the method on hot forming dies materials surface using welding wire Download PDFInfo
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- CN105728979B CN105728979B CN201610204249.3A CN201610204249A CN105728979B CN 105728979 B CN105728979 B CN 105728979B CN 201610204249 A CN201610204249 A CN 201610204249A CN 105728979 B CN105728979 B CN 105728979B
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
- B23K35/308—Fe as the principal constituent with Cr as next major constituent
- B23K35/3086—Fe as the principal constituent with Cr as next major constituent containing Ni or Mn
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/40—Making wire or rods for soldering or welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/24—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass dies
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Nonmetallic Welding Materials (AREA)
- Arc Welding In General (AREA)
Abstract
Strengthen the method on hot forming dies materials surface the invention discloses a kind of welding wire and its preparation, using the welding wire, wherein, the welding wire contains the ferro element for accounting for the Quality of Final Welding Wire 85.2%~89%, and includes the chromium for accounting for the Quality of Final Welding Wire 5.71%~6.98%, 0.86%~1.52% carbon, 1.16%~1.63% manganese element, 0.56%~0.84% v element, 0.55%~1.0% niobium element, 1.39%~1.63% molybdenum element, 0.5%~1.1% element silicon and 0.08%~0.1% nitrogen.The present invention passes through the ingredient and proportioning to being pre-designed welding wire, especially the ingredient of the alloy powder of composition welding wire wire drawing raw material and proportioning etc. are improved, so that the welding wire is particularly applicable to the reinforcing of hot forming dies materials working surface, the performance of surface of hot working die hot operation is improved.
Description
Technical field
The invention belongs to metal material surface technical fields, more particularly, to a kind of welding wire and its preparation and application
The method that the welding wire strengthens hot forming dies materials surface, wherein it is base to strengthen the method on hot forming dies materials surface using the welding wire
In gas shielded arc welding, the reinforcing for being particularly suitable for surface of hot working die is modified.
Background technology
Hot forming dies materials are during service under the action of high temperature, high pressure and pulsating stress, the heat that working surface generates
Fatigue surface crack and high temperature wear are the principal modes of mould invalidation, account for all failure molds most probably, and the system of mold
Standby cost is very high (material and processing), and the production cycle grows (time for generally wanting some months), greatly reduces the use of mold
Performance and service life.In order to improve the service life of mold, the wear-resisting property of its working surface and the fracture toughness of material need to be improved.
Traditional method is heat-treated to carbon alloy steel to obtain uniform structure property and use surface
The method of quenching obtains the material of high tenacity, high-wear resistance.But the surface formed is due to the difference of cooling velocity, often shape
At non-uniform institutional framework, and disperse effect of the carbide of main hardening constituent-chromium in steel matrix is poor, and high temperature is steady
Qualitative energy is insufficient, is easy to make M during heat treatment23C6、M7C3Equal carbide hards particle excessively grows up to form hard crisp phase.Research
It was found that if solid solution and alloy strengthening can be carried out to steel instead of a part of carbon using nitrogen, matrix toughness can not lost
Meanwhile the nitride alloy particle with high temperature stability performance is precipitated, improve the hardness, wearability and high-temperature stability of steel；And
And nitrogen is compared to carbon and there is better solution strengthening performance, nitrogen compound also to have better high temperature steady than carbide simultaneously
Qualitative and dispersivity.
Industry realizes that nitrogen replaces there are mainly two types of the methods that use of part carbon at present, one is when cast steel inside
Logical nitrogen, then long-time high temperature and pressure, makes its solid solution in the base, and solid solubility is high and uniform；Another kind is surface carburization, oozes
Boron, carburizing or binary, multicomponent thermochemical treatment can form the strengthening layer of one layer very thin of (micron order), the very high surface of intensity.The
A kind of method is typically used as large batch of steel production, and such as H13 steel, but the mold for being not readily used for scene repairs operation again.Second
Kind of method takes too long, generally requires four or five hours to more than more than ten, 20 a hours, and this method needs vacuum environment,
It is operating difficulties, of high cost and restricted to sample size；It is insufficient to strengthen layer thickness, and strengthens effect along thickness direction distributed pole
For unevenness, cannot meet by the rigid requirement of the hot-work die under circulation machinery/thermal stress effect.
Invention content
For the disadvantages described above or Improvement requirement of the prior art, the purpose of the present invention is to provide a kind of welding wire and its systems
The method that the standby and application welding wire strengthens hot forming dies materials surfaces, wherein by it is crucial be pre-designed welding wire at
Divide and proportioning, the especially ingredient of the alloy powder of composition welding wire wire drawing raw material and proportioning etc. are improved so that the welding wire is outstanding
It can be applied to the reinforcing of hot forming dies materials working surface, can effectively solve the problem that pass through surface hardening at present compared with prior art
The problem and carbon alloy steel of the surface of hot working die high-temperature working performance deficiency of reinforcing are easy under the high temperature conditions for a long time
There are the tissue deteriorations phenomenons such as decarburization softening.
To achieve the above object, according to one aspect of the present invention, a kind of welding wire is provided, which is characterized in that the welding wire
Containing accounting for the ferro element of the Quality of Final Welding Wire 85.2%~89%, and it include the chromium member for accounting for the Quality of Final Welding Wire 5.71%~6.98%
Element, 0.86%~1.52% carbon, 1.16%~1.63% manganese element, 0.56%~0.84% v element,
0.55%~1.0% niobium element, 1.39%~1.63% molybdenum element, 0.5%~1.1% element silicon and 0.08%~
0.1% nitrogen.
As present invention further optimization, the welding wire includes the chromium for accounting for the Quality of Final Welding Wire 5.95%, 1.11%
Carbon, 1.2% manganese element, 0.6% v element, 0.6% niobium element, 1.50% molybdenum element, 0.6% silicon member
Element and 0.08%~0.1% nitrogen, surplus is ferro element.
As present invention further optimization, the welding wire includes the chromium for accounting for the Quality of Final Welding Wire 5.71%, 1.4%
Carbon, 1.2% manganese element, 0.8% v element, 0.6% niobium element, 1.5% molybdenum element, 0.8% element silicon
With 0.08% nitrogen, surplus is ferro element.
As present invention further optimization, the welding wire includes the chromium for accounting for the Quality of Final Welding Wire 6.98%, 0.86%
Carbon, 1.2% manganese element, 0.56% v element, 1.0% niobium element, 1.39% molybdenum element, 0.5% silicon
Element and 0.1% nitrogen, surplus is ferro element.
Another aspect according to the invention, the present invention provides a kind of methods preparing above-mentioned welding wire, which is characterized in that packet
Include following steps：
(1) preparation of alloy powder：
High carbon ferro-chrome, electrolytic manganese, ferrosilicon, molybdenum-iron, chromium nitride and iron powder are uniformly mixed and obtain alloy powder, the high-carbon
Ferrochrome accounts for the 46% of the alloy powder quality, and the electrolytic manganese accounts for the 6.5% of the alloy powder quality, and the ferrosilicon accounts for institute
The 4% of alloy powder quality is stated, the molybdenum-iron accounts for the 13.5% of the alloy powder quality, and the chromium nitride accounts for the alloyed powder
The 4.5% of last quality；
(2) preparation of welding wire：
Wire drawing raw material is obtained during the alloy powder that the step (1) obtains is wrapped up with wire drawing machine into H08A steel bands, it is described
Alloy powder accounts for the 18%~20% of the wire drawing material quality, then the wire drawing raw material wire drawing process is obtained welding wire.
As present invention further optimization, a diameter of 1.2mm for the welding wire that the step (2) obtains.
As present invention further optimization, the alloy powder in the step (1) also passes through sieving and handles, the alloyed powder
The mesh number at end is not less than 60 mesh.
It is another aspect of this invention to provide that the present invention provides a kind of above-mentioned welding wires of application to strengthen hot forming dies materials surface
Method, which is characterized in that include the following steps：
(1) welding wire is used to carry out soldering to hot forming dies materials to be fortified：
Using hot forming dies materials to be fortified as base material, the oxide and pollutant on the base material surface are removed；Then,
In CO2Wire melting is welded on the base material surface under gas shield, forms multiple tracks multilayer welding, the multiple tracks multilayer welding, that is, stiff dough
Alloy-layer；
(2) temper：
The base material that the surface soldered that step (1) obtains is had to hard facing alloy layer, in N2Under the conditions of protective atmosphere, in
Temper at least 2h, finally obtains the hot forming dies materials of surface peening at 550 DEG C~580 DEG C.
As present invention further optimization, the number of plies of the multi-pass welding in the step (1) is 3 layers~5 layers.
As present invention further optimization, the upper surface for the hard facing alloy layer that the step (1) obtains is also by polishing
Processing.
As present invention further optimization, the hot forming dies materials to be fortified in the step (1) are heat-resisting
Steel；Preferably martensite heat-resistant steel；Preferably 1Cr11MoV steel.
Welding wire in the present invention (especially forms the conjunction of welding wire wire drawing raw material by the ingredient and proportioning for being pre-designed welding wire
The ingredient and proportioning at bronze end) so that the welding wire is particularly applicable to the reinforcing of hot forming dies materials (such as heat resisting steel) working surface；
By controlling the technological parameter of welding process, CO is utilized2The method of gas shielded arc welding is in one layer of common heat-resisting steel sheet and plate surface cladding
The nitrogen alloying hard facing alloy layer of dense uniform forms tough outer strong gradient martensite steel in one layer by the method for multi-pass welding
Material；And stress is moved back by carrying out tempering at a temperature of being actually used close to mold, in drawing process, carboritride is lasting
It is precipitated, forms tiny and disperse Hard Inclusion distribution, the hot forming dies materials after obtained reinforcing are in 500~600 DEG C of temperature models
There is good high temperature stability performance and mechanical property in enclosing, the service life of mold can be improved, and can be used for repairing easily damaged
The mold of failure；The intensifying method is simple and practicable, is not limited by mold own dimensions shape, and industrialized production is convenient for.
The present invention uses CO2Gas shield manual electric arc welding, common heat resisting steel (preferably the higher steel of toughness, it is more excellent
Be selected as martensite steel, such as 1Cr11MoV) one layer of high performance overlaying metal of surface cladding manufacture or repair hot forged mould,
Can nitrogen be efficiently subjected to alloy strengthening by the form of alloy state to mould steel matrix.Hard facing alloy is placed in N by postwelding2
Lower 550 DEG C of pressure atmosphere carries out tempering 2 hours, eliminates residual stress and improves structure property, it is good to obtain mechanical behavior under high temperature
New hot-work die working surface.
In the present invention using special welding wire, hot forming dies materials surface reinforcing method based on gas shielded arc welding have it is fast
The easy-operating feature of speed, it is millimeter even Centimeter Level to strengthen layer thickness, and can pass through carrying out flaw detection and simulation different condition
Under mold damage mechanisms obtain the working surface of different performance by adjusting component of weld wire (wear-resisting, hardness, toughness are different)；
For example, the intensity after making it strengthen in the region being easily recessed is high, the wearability after making it strengthen in region easy to wear is good,
And for the region of not easy damaged, as long as the wear-resisting property before its reinforcing meets requirement, then to the region of the not easy damaged
It is then not necessarily to more strengthen, to reduce cost, on the other hand, it is also possible that one set of die surface reaches equivalent life mistake as far as possible
Effect, improves the material use efficiency of hot forming dies materials.To sum up, it has the advantages that：
1. implementation process is simple and practicable, live reparation can be carried out to impaired mold and remanufacture processing, not by die size
Industrialized production is convenient in the limitation of shape, and layer and base material binding performance are good, should not fall off；
2. surface of hot working die working performance, especially mechanical behavior under high temperature can be significantly improved, or even it can reach and surpass
Cross hot die steel self performance；
3. since the present invention is that hard facing alloy cladding can be greatlyd save expensive mould steel in common heat-resisting steel sheet and plate surface
Material utilization amount reduces production cost；
4. by adjusting the composition proportion of welding wire, the proportioning content of the alloy powder of wire drawing raw material is such as formed, makes to be located at mother
The hard facing alloy layer on material surface can integrate to form interior tough outer strong gradient-structure with base material, and the fatigue for being conducive to improve mold is anti-
Power.
Description of the drawings
Fig. 1 is that wire melting forms multiple tracks multilayer welding schematic diagram on base material surface, and rectangular box therein is that stiff dough closes
Effective working lining signal of gold；The rectangular box generally lies in the 3rd layer of multi-pass welding and with upper layer；In the rectangle side
Region (such as the 1st layer weldering or the 2nd layer of weldering) below frame, closer to base material surface, since the hard facing alloy layer in these regions can quilt
The base material composition of fusing dilutes, and toughness is higher and intensity is relatively low, generally not as the most appearance of the hot forming dies materials after reinforcing
Face；The number of plies of multi-pass welding is more, and the thickness of effective working lining of hard facing alloy is thicker, and anti abrasive performance is better；
In view of the number of plies is more, cost is higher, and general multi-pass welding is three layers~five layers weldering.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
It does not constitute a conflict with each other and can be combined with each other.
Embodiment 1
Welding wire in the present embodiment meets：The welding wire includes accounting for the ferro element of the Quality of Final Welding Wire 85.2%~89%, and wrap
Include the chromium, 0.86%~1.52% that account for the Quality of Final Welding Wire 5.71%~6.98% carbon, 1.16%~1.63%
Manganese element, 0.56%~0.84% v element, 0.55%~1.0% niobium element, 1.39%~1.63% molybdenum element,
0.5%~1.1% element silicon and 0.08%~0.1% nitrogen.
Alloy powder used is by accounting for the high carbon ferro-chrome of alloy powder gross mass 46wt%, the electricity of 6.5 wt% in the present embodiment
The ferrosilicon of Xie Meng, 4wt%, the molybdenum-iron of 13.5wt%, 4.5wt% chromium nitride be equipped with iron powder composition；Aforementioned proportion proportioning be with
Based on common hot die steel H13 composition of steel, optimizes rear and be added what nitride obtained.It is specifically prepared in alloy powder
In the process, it is the powder that each constituents have been weighed first, in accordance with said ratio, then by the sieving of these powder, (mesh number of sieve can
Think 60 mesh or 60 mesh or more), then these powder are uniformly mixed, wire drawing machine is used in combination to be wrapped in uniformly mixed powder
In H08A steel bands, welding wire raw material is made.Then, welding wire is obtained into filling rate about 18-20%, diameter by being segmented wire-drawing equipment
For the welding wire of 1.2mm.
Using above-mentioned welding wire, using CO2Gas shielded arc welding cladding nitrogen alloying hard facing alloy material improves hot-work die material
Expect surface property.First, by common heat-resisting steel sheet and plate surface scale removal and organic pollution, and it is preheating to a constant temperature
Degree, in CO2Under gas shield, wire melting is coated to heat-resisting steel sheet and plate surface using robotic arm；Using multiple tracks multilayer welding, weldering
Three to five layers or more, to eliminate dilution of the base material composition to hard facing alloy ingredient, and make welding interface be mutually lapped；Control cooling
Speed obtains the final of hard facing alloy and is organized as smaller retained austenite and is located therein lath martensite tissue.It can be additional
Sanding and polishing is carried out to hard facing alloy layer and removes the non-uniform part in surface, it is having for hard facing alloy to make hard facing alloy upper surface
Imitate working lining.Hard facing alloy after polishing is put into N2Tempering is carried out under the conditions of protective atmosphere moves back stress processing 2 hours, tempering temperature
Degree control is in 10-20 DEG C or so of the actual work temperature less than mold.Nitrogen partial pressure can not only prevent hard facing alloy denitrogenation, may be used also
To further increase the nitrogen content of alloyed layer.It will be continuously precipitated in drawing process, in hard facing alloy tiny and disperse
Carboritride, these carbonitride alloy products mainly have titanium carbonitride, niobium carbonitrides, vanadium carbide nitride etc., have good high temperature
Stability is not easy to form coarse compound particle, causes decarburization denitrogenation in alloy substrate and hot mastication phenomenon occurs.
For using 1Cr11MoV steel as base material, the 1Cr11MoV surface of steel plate grinding wheels that thickness is 15mm are removed into oxidation
Skin and other pollutants；Above-mentioned welding wire is fitted into the wire feeder of automatic welding robotic arm, in CO2Under gas shield, use
Automatic welding mode is welded on base material surface into wire melting is about to.Welding wire is 2-3mm at a distance from base material surface of steel plate to ensure
The stabilization of electric arc；Automatic welding parameter is set, if weldingvoltage is 28-29V, welding current 230-240A, speed of welding 55-
60 cm/min, path of welding are the straight line of length 200mm, and multiple tracks multilayer welding is formed (as shown in Figure 1, layer is on base material surface
5 layers), and welding interface is made to be mutually lapped.The initial hard facing alloy layer that wire melting is formed, thickness is about 15mm；Then, it goes
Except the uneven layer of the initial hard facing alloy layer surface 2-3mm, retain 12mm-13mm hard facing alloy layer (including with base material
Between transition zone), and exposure the hard facing alloy layer working surface.
Finally, the base material of hard facing alloy layer will be covered in N2Under the conditions of protective atmosphere, at 550 DEG C~580 DEG C at tempering
At least 2h is managed, welding residual stress can be substantially eliminated, finally obtain the hot forming dies materials of surface peening.
Above-described embodiment is to use automatic welding means, and welding wire can also (such as artificial CO in other ways2Gas shielded arc welding etc.
Mode) fusion welding is on base material surface.
Welding wire melting postcooling in the present invention forms the cooling velocity of hard facing alloy layer, and it is logical to need to meet lath martensite
The normal rate request being quickly cooled down, it is ensured that austenite umklappen is lath martensite tissue.
Embodiment 2
It is similar to Example 1, it is suitable for strengthening the welding wire on hot forming dies materials surface, element composition and ratio can also be adopted
With following ratio：Welding wire include the chromium for accounting for the Quality of Final Welding Wire 5.95%, 1.11% carbon, 1.2% manganese element,
0.6% v element, 0.6% niobium element, 1.50% molybdenum element, 0.6% element silicon and 0.08%~0.1% nitrogen
Element, surplus are ferro element.
Embodiment 3
It is similar to Example 1, it is suitable for strengthening the welding wire on hot forming dies materials surface, element composition and ratio can also be adopted
With following ratio：Welding wire include the chromium for accounting for the Quality of Final Welding Wire 5.71%, 1.4% carbon, 1.2% manganese element,
0.8% v element, 0.6% niobium element, 1.5% molybdenum element, 0.8% element silicon and 0.08% nitrogen, surplus
For ferro element.
Embodiment 4
It is similar to Example 1, it is suitable for strengthening the welding wire on hot forming dies materials surface, element composition and ratio can also be adopted
With following ratio：Welding wire include the chromium for accounting for the Quality of Final Welding Wire 6.98%, 0.86% carbon, 1.2% manganese element,
0.56% v element, 1.0% niobium element, 1.39% molybdenum element, 0.5% element silicon and 0.1% nitrogen, surplus
For ferro element.
Welding wire in the present invention may inherit the impurity in H08A steel.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, all within the spirits and principles of the present invention made by all any modification, equivalent and improvement etc., should all include
Within protection scope of the present invention.
Claims (7)
1. the method that application welding wire strengthens hot forming dies materials surface, which, which contains, accounts for the Quality of Final Welding Wire 85.2%~89%
Ferro element, and include the chromium for accounting for the Quality of Final Welding Wire 5.71%~6.98%, 0.86%~1.52% carbon, 1.16%
~1.63% manganese element, 0.56%~0.84% v element, 0.55%~1.0% niobium element, 1.39%~1.63%
Molybdenum element, 0.5%~1.1% element silicon and 0.08%~0.1% nitrogen, which is characterized in that the application process packet
Include following steps：
(1) welding wire is used to carry out soldering to hot forming dies materials to be fortified：
Using hot forming dies materials to be fortified as base material, the oxide and pollutant on the base material surface are removed；Then, in CO2
Wire melting is welded on the base material surface under gas shield, forms multiple tracks multilayer welding, the multiple tracks multilayer welding, that is, hard facing alloy
Layer；
(2) temper：
The base material that the surface soldered that step (1) obtains is had to hard facing alloy layer, in N2Under the conditions of protective atmosphere, in 550 DEG C~
Temper at least 2h at 580 DEG C, finally obtains the hot forming dies materials of surface peening.
2. strengthening the method on hot forming dies materials surface as described in claim 1, which is characterized in that the welding wire includes accounting for the weldering
The chromium of yarn quality 5.95%, 1.11% carbon, 1.2% manganese element, 0.6% v element, 0.6% niobium member
Element, 1.50% molybdenum element, 0.6% element silicon and 0.08%~0.1% nitrogen, surplus is ferro element；
Alternatively, the welding wire include the chromium for accounting for the Quality of Final Welding Wire 5.71%, 1.4% carbon, 1.2% manganese element,
0.8% v element, 0.6% niobium element, 1.5% molybdenum element, 0.8% element silicon and 0.08% nitrogen, surplus
For ferro element；
Alternatively, the welding wire include the chromium for accounting for the Quality of Final Welding Wire 6.98%, 0.86% carbon, 1.2% manganese element,
0.56% v element, 1.0% niobium element, 1.39% molybdenum element, 0.5% element silicon and 0.1% nitrogen, surplus
For ferro element.
3. strengthening the method on hot forming dies materials surface as claimed in claim 1 or 2, which is characterized in that in the step (1)
The number of plies of multi-pass welding is 3 layers~5 layers.
4. strengthening the method on hot forming dies materials surface as claimed in claim 1 or 2, which is characterized in that the step (1) obtains
Hard facing alloy layer upper surface also pass through grinding process.
5. strengthening the method on hot forming dies materials surface as claimed in claim 1 or 2, which is characterized in that in the step (1)
The hot forming dies materials to be fortified are heat resisting steel.
6. strengthening the method on hot forming dies materials surface as claimed in claim 5, which is characterized in that the heat resisting steel is martensite
Heat resisting steel.
7. strengthening the method on hot forming dies materials surfaces as claimed in claim 5, which is characterized in that the heat resisting steel is
1Cr11MoV steel.
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| CN110549031A (en) * | 2018-05-31 | 2019-12-10 | 上海电气电站设备有限公司 | High-heat-strength welding wire for dissimilar steel welding joint |
| CN109175775B (en) * | 2018-10-23 | 2021-11-12 | 郑州大学 | Flux-cored wire for welding weathering resistant steel Q550NH |
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| CN1727108A (en) * | 2004-05-18 | 2006-02-01 | 株式会社神户制钢所 | Welding wire for modified 9Cr-1Mo steel, and submerged-arc welding material |
| CN101062533A (en) * | 2006-04-28 | 2007-10-31 | 北京中煤大田耐磨材料有限公司 | Abrasion-proof pile-up welding flux-cored wire for roll squeezer |
| CN101602132A (en) * | 2009-07-15 | 2009-12-16 | 华北电力大学 | The preparation method who is used for the powder-cored welding wire and the cladding layer of surface of hot working die cladding |
| CN104785895A (en) * | 2015-05-05 | 2015-07-22 | 合肥东方节能科技股份有限公司 | Submerged arc surfacing manufacturing technology of looper roll for rolling mill |
| CN105057926A (en) * | 2015-09-22 | 2015-11-18 | 山东大学 | Special flux-cored wire for hot-working die repairing surfacing |
| CN105414798A (en) * | 2015-12-21 | 2016-03-23 | 四川鸿舰重型机械制造有限责任公司 | Flux-cored wire for coke-breaking roll overlaying welding |
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