CN106736026A - A kind of direct built-up welding hardening welding rod of cast iron stamping mold - Google Patents
A kind of direct built-up welding hardening welding rod of cast iron stamping mold Download PDFInfo
- Publication number
- CN106736026A CN106736026A CN201611163777.5A CN201611163777A CN106736026A CN 106736026 A CN106736026 A CN 106736026A CN 201611163777 A CN201611163777 A CN 201611163777A CN 106736026 A CN106736026 A CN 106736026A
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- Prior art keywords
- welding
- core wire
- coating
- welding rod
- cast iron
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Classifications
-
- 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
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/3601—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with inorganic compounds as principal constituents
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The invention discloses a kind of direct built-up welding hardening welding rod of cast iron stamping mold, the present invention is combined by core wire and coating, core wire using high-quality H08E carbon steel heart yearns, coating accounts for 50% the 60% of core wire and coating gross weight.Welding rod of the present invention has surfacing hardness and wearability higher, with good welding technological properties, anti-cracking performance higher, by increasing capacitance it is possible to increase the service life of stamping mold.
Description
Technical field
The invention belongs to field of welding material, more particularly to a kind of direct built-up welding hardening welding rod of cast iron stamping mold.
Background technology
Large-scale cold-punching mould is integrally manufactured needs complicated machining and heat treatment, and complex process, cycle be long, high cost, one
As for high-volume, metastable product.And the simplification of combination die processing technology, cycle is short, low cost, thus application is more next
It is wider, particularly development of new larger stamping parts product when, mould has more unrivaled superiority.Using in cast iron matrix
Upper surfacing manufacturing cold punching mold technique, above-mentioned advantage is more prominent.D322 welding rods have in the Hardfacing Electrode Used For Die for using at present
Surfacing hardness higher and wearability, but bead-welding technology is poor, and surfacing layer metal is also easy to produce crackle, and in production application
In, the module of built-up welding is also easy to produce and collapses block；D017 and D027 welding rods have preferable welding technological properties and weld metal have compared with
Good cracking resistance, but surfacing layer metal lower hardness, cause die life relatively low.
The content of the invention
Regarding to the issue above, the invention discloses a kind of direct built-up welding hardening welding rod of cast iron stamping mold, the weldering
Bar has good welding technological properties, anti-cracking performance higher, stamping mold is had service life more long.
The technical scheme is that, a kind of direct built-up welding hardening welding rod of cast iron stamping mold, by core wire and coating group
Into the coating accounts for the 50%-60% of core wire and coating gross weight；
On the basis of core wire gross weight, according to percentage by weight, the chemical composition of the welding rod core wire is as follows：
On the basis of coating gross weight, according to percentage by weight, the chemical composition of the coating is as follows：
Calcium carbonate：22%~32%；Magnesium carbonate：5%~10%；Calcirm-fluoride：15%~25%；Rutile：3%~8%；
Titanium dioxide：0.1%~1.5%；Silica：3%~8%；High carbon ferromanganese：2%~6%；Ferrosilicon：3%~8%；Chromium powder：
15%~25%；Nickel powder：6%~10%；Molybdenum powder：1%~3%；Vanadium iron：1%~3%；Cobalt powder：1%~3%.
The percentage by weight of the deposited metal composition that the direct built-up welding hardening of cast iron stamping mold is formed with welding rod
Including：
According to the condition of work of cold-punching mould, cold-punching mould surfacing layer metal should have hardness and rational hardness gradient higher
Distribution, good impact flexibility, intensity higher, anti-wear performance and anti-fatigue performance high.So, alloy must possess good
Air cooled hardenability, and the carbide of certain amount and reasonable layout can be formed on matrix, to ensure that overlay cladding has enough
Hardness and anti-wear performance；Should also there is strong, toughening element simultaneously, to ensure that overlay cladding has good comprehensive mechanical property.By
Test of many times is analyzed and verified, surfacing welding of the present invention uses CrNiCoMoV alloy systems.
It is as follows that the deposited metal composition that welding rod of the present invention is formed chooses reason：
C：Carbon is the essential element for determining surfacing layer metal hardness, it not only directly the decision hardness of martensite, form and
Performance, and be the necessary condition for ensureing to be formed appropriate carbide.But phosphorus content increase can make welding performance be deteriorated, carried in impact
High-strength tenacity mould steel carbon content under lotus effect is 0.04-0.2%.
Cr：Chromium dissolves in the quenching degree of raising steel in austenite, and Cr can be formed again7C3The wearability of steel is improved, and in certain journey
Prevent martensite to decompose on degree, improve steel belt roof bolt stability and produce post-curing.Chromium content too Gao Shiyi makes overlay cladding group
Knit increases with diffusion carbide inhomogeneities, material is become fragile, so, the content of chromium is more suitable in 9-10.5%.
Ni：Martensite transformation temperature can be reduced, is conducive to the precipitation of precipitated phase in martensite, have metal good plain tough
Property.Ni can reduce dot matrix Dislocations motion drag and dislocation and interstitial element reciprocation energy, promote stress relaxation, so as to subtract
Few brittle fracture tendency.Therefore the content of nickel element is advisable in 4.0-6.0%.
Mn：Because chromium content is lower than conventional mould steel in hardfacing alloy, appropriate manganese is added strongly to improve quenching degree, and rise
Solution strengthening effect.Manganese expands austenitic area, increases residual austenite content in overlay cladding, reduces quenching distortion and cracking.Contain
The too high superheated susceptivity that can increase steel of amount, retained austenite can reduce the hardness of steel too much in addition, therefore the content of manganese is about
0.6-1.3%.
Si：Silicon almost all plays solution strengthening effect in being dissolved in austenite or ferrite, and silicon can promote graphitization, in cast iron
The chilling tendency of transition region can be reduced on matrix during built-up welding, improves the binding ability of surfacing layer metal.Silicon is playing solution strengthening work
With while also reduce the plasticity and toughness of surfacing layer metal, increase decarburizing tendency, therefore the addition of element silicon is 0.4-
0.7%.
Mo：Molybdenum can significantly improve surfacing layer metal quenching degree, and the effect with crystal grain thinning, improve the strength of materials
While can improve the toughness of material again.Molybdenum can also significantly inhibit temper brittleness.The content of molybdenum element is 0.7-
1.0%.
V：Vanadium is carbide, with hardness and wearability very high, and is in Dispersed precipitate more, prevents built-up welding
The undue of layer metal grain is grown up, and content of vanadium is advisable in 0.5-1.1%, and crossing at most can become the grinding performance of surfacing layer metal
It is bad.
In view of industrial production physical condition and cost, core wire selects low-carbon steel core H08E, by containing various alloying elements
Electrode coating carry out the corresponding alloying component of transition.Electrode coating type can select lime-titania type and low hydrogen type.Lime-titania type slag system oxygen
The property changed is strong, and the mechanical property of surfacing layer metal is good not as hydrogen controlled covering, and low hydrogen type slag system has alloy transfer efficiency
High, weld metal hydrogen content is low, and Resistance of Weld Metal can play refining effect, make it have good cracking resistance and mechanical property
Energy.The present invention uses hydrogen controlled covering.
The beneficial effects of the invention are as follows：
1. welding rod of the present invention can the directly built-up welding on cast iron matrix, with good processing performance, simple and reliable process, warp
Ji is practical, can make the service life of stamping mold and increase 30-50%.
2. on cast iron matrix during built-up welding, surfacing layer metal has good cracking resistance and wearability to welding rod of the invention
Energy.
Welding rod of the present invention has surfacing hardness and wearability higher, with good welding technological properties, higher
Anti-cracking performance, by increasing capacitance it is possible to increase the service life of stamping mold.
Specific embodiment
Technical scheme is further described with reference to specific embodiment, but the present invention is not limited to this
A little embodiments.
The present invention is combined by core wire and coating, and core wire uses the H08E carbon steel heart yearns of high-quality, coating to account for core wire and coating
The 50%-60% of gross weight.
Embodiment 1：
Using manufacturing process general in welding rod production industry, core wire is made by the H08E carbon steels core wire of the high-quality of table 1-1,
Coating recipe according to table 1-2 is prepared and is prepared electrode coating by dry-mixed wet mixing, and electrode coating is coated to core wire
On, it is allowed to be molded：
Table 1-1 core wire composition (units：Wt%)
| C | Mn | Si | Cr | Ni | P | S | Fe |
| 0.013 | 0.34 | 0.02 | 0.011 | 0.019 | 0.008 | 0.007 | Surplus |
Table 1-2 coating recipe (units：Percentage by weight %)
Its deposited metal composition is shown in Table 1-3, and Rockwell hardness is shown in Table 1-4.
Chemical composition (the unit of table 1-3 deposited metals：The percentage % of welding rod weight)
| C | Mn | Si | P | S | Ni | Cr | Mo | V | Co | Fe |
| 0.09 | 1.05 | 0.41 | 0.026 | 0.006 | 4.7 | 9.8 | 0.91 | 0.70 | 0.82 | Surplus |
The Rockwell hardness of table 1-4 deposited metals
Embodiment 2：
Using manufacturing process general in welding rod production industry, made using the H08E carbon steels core wire of the high-quality of same heat (batch) number
Core wire, core wire composition is prepared according to the coating recipe of table 2-1 and is prepared welding rod painting by dry-mixed wet mixing with embodiment 1
Material, electrode coating is coated on core wire, is allowed to be molded：
Table 2-1 coating recipe (units：Percentage by weight %)
Its deposited metal composition is shown in Table 2-2, and Rockwell hardness is shown in Table 2-3.
The chemical composition (percentage by weight %) of table 2-2 deposited metals
| C | Mn | Si | P | S | Ni | Cr | Mo | V | Co | Fe |
| 0.09 | 0.95 | 0.52 | 0.027 | 0.006 | 4.5 | 10.1 | 0.90 | 0.81 | 0.85 | Surplus |
The Rockwell hardness of table 2-3 deposited metals
Embodiment 3：
Using manufacturing process general in welding rod production industry, made using the H08E carbon steels core wire of the high-quality of same heat (batch) number
Core wire, core wire composition is prepared according to the coating recipe of table 3-1 and is prepared welding rod painting by dry-mixed wet mixing with embodiment 1
Material, electrode coating is coated on core wire, is allowed to be molded：
Table 3-1 coating recipe (units：Percentage by weight %)
Its deposited metal composition is shown in Table 3-2, and Rockwell hardness is shown in Table 3-3.
The chemical composition (percentage by weight %) of table 3-2 deposited metals
| C | Mn | Si | P | S | Ni | Cr | Mo | V | Co | Fe |
| 0.089 | 0.95 | 0.57 | 0.027 | 0.006 | 4.9 | 10.2 | 0.84 | 0.83 | 0.91 | Surplus |
The Rockwell hardness of table 3-3 deposited metals
From above example, welding rod of the present invention has good welding technological properties, anti-cracking performance higher, uses
Its surfacing manufacturing cold-punching mould insert, service life of the service life with tool steel insert after heat treatment is suitable, up to 2.5 ten thousand
Part, the service life of the cold-punching mould than being repaired with D322 welding rods improves 30-50%.
Welding rod of the present invention has surfacing hardness and wearability higher, with good welding technological properties, higher
Anti-cracking performance, by increasing capacitance it is possible to increase the service life of stamping mold.
Above-described is only the preferred embodiment of the present invention, it is noted that for one of ordinary skill in the art
For, without departing from the concept of the premise of the invention, various modifications and improvements can be made, these belong to the present invention
Protection domain.
Claims (2)
1. a kind of direct built-up welding hardening welding rod of cast iron stamping mold, is made up of core wire and coating, it is characterised in that the coating
Account for the 50%-60% of core wire and coating gross weight；
On the basis of core wire gross weight, according to percentage by weight, the chemical composition of the core wire is as follows：
On the basis of coating gross weight, according to percentage by weight, the chemical composition of the coating is as follows：
Calcium carbonate：22%~32%；Magnesium carbonate：5%~10%；Calcirm-fluoride：15%~25%；Rutile：3%~8%；Titanium white
Powder：0.1%~1.5%；Silica：3%~8%；High carbon ferromanganese：2%~6%；Ferrosilicon：3%~8%；Chromium powder：15%~
25%；Nickel powder：6%~10%；Molybdenum powder：1%~3%；Vanadium iron：1%~3%；Cobalt powder：1%~3%.
2. the direct built-up welding hardening welding rod of cast iron stamping mold according to claim 1, it is characterised in that the welding rod shape
Into the percentage by weight of deposited metal composition include：
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611163777.5A CN106736026A (en) | 2016-12-15 | 2016-12-15 | A kind of direct built-up welding hardening welding rod of cast iron stamping mold |
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|---|---|---|---|
| CN201611163777.5A CN106736026A (en) | 2016-12-15 | 2016-12-15 | A kind of direct built-up welding hardening welding rod of cast iron stamping mold |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109530853A (en) * | 2019-01-03 | 2019-03-29 | 苏州慧金新材料科技有限公司 | A kind of preparation method of aluminium alloy smelting tool |
Citations (6)
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| JPS5564991A (en) * | 1979-09-14 | 1980-05-16 | Taiheiyo Kinzoku Kk | Cast iron core wire welding rod |
| JPS59229285A (en) * | 1983-06-13 | 1984-12-22 | Mitsubishi Heavy Ind Ltd | Stainless steel plate for build-up welding |
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| CN102974959A (en) * | 2012-11-26 | 2013-03-20 | 黑龙江农业工程职业学院 | Welding rod for repairing cold working die cutting edge |
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2016
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Patent Citations (6)
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|---|---|---|---|---|
| JPS5564991A (en) * | 1979-09-14 | 1980-05-16 | Taiheiyo Kinzoku Kk | Cast iron core wire welding rod |
| JPS59229285A (en) * | 1983-06-13 | 1984-12-22 | Mitsubishi Heavy Ind Ltd | Stainless steel plate for build-up welding |
| CN101168219A (en) * | 2006-10-26 | 2008-04-30 | 中国船舶重工集团公司第七二五研究所 | Method for preparing low hydrogen type downwards electrode |
| CN102528310A (en) * | 2010-12-28 | 2012-07-04 | 昆山京群焊材科技有限公司 | Hydrogen-induced crack resisting high-ductility ultra-low hydrogen welding electrode |
| CN102974959A (en) * | 2012-11-26 | 2013-03-20 | 黑龙江农业工程职业学院 | Welding rod for repairing cold working die cutting edge |
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Non-Patent Citations (1)
| Title |
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| 何柏林等: "大型冷冲模铸铁镶块堆焊焊条的研制及应用", 《热加工工艺》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109530853A (en) * | 2019-01-03 | 2019-03-29 | 苏州慧金新材料科技有限公司 | A kind of preparation method of aluminium alloy smelting tool |
| CN109530853B (en) * | 2019-01-03 | 2021-08-03 | 苏州慧金新材料科技有限公司 | Preparation method of tool for smelting aluminum alloy |
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Application publication date: 20170531 |