CN103498145A - Laser cladding method for key part of stamping die - Google Patents
Laser cladding method for key part of stamping die Download PDFInfo
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- CN103498145A CN103498145A CN201310396983.0A CN201310396983A CN103498145A CN 103498145 A CN103498145 A CN 103498145A CN 201310396983 A CN201310396983 A CN 201310396983A CN 103498145 A CN103498145 A CN 103498145A
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Abstract
The invention discloses a laser cladding method for a key part of a stamping die. The method comprises the following steps: a, preprocessing the key part of the stamping die; b, prefabricating alloy powder; c, determining the stress position of the stamping die through research on stress of the stamping die, carrying out laser cladding on the surface of the key part of the stamping die by using a laser in a coaxial powder feeding manner and subjecting a laser cladding area to inert gas shielding; and d, carrying out subsequent processing, i.e., carrying out later machining on the stamping die having undergone laser cladding. According to the invention, through uniform mixing of the powder and a matrix material, the key part of the stamping die has high impact resistance, strength, toughness and wear resistance, and the service life of the stamping die is substantially prolonged.
Description
Technical field
The present invention relates to a kind of laser cladding method for the press tool key position, belong to the field that laser melting coating increases the metallic surface performance.
Background technology
Laser has high brightness, high directivity, high monochromaticity, high coherency's characteristics, just by increasing field, is used now, and laser melting coating is exactly a kind of in process for treating surface.That summarizes says, the principle of laser melting coating utilizes high energy laser beam to irradiate metal material surface exactly, substrate surface is melted rapidly, liquid metal forms a small-scale molten bath, fill in new powdered material simultaneously, in this molten bath, metallic substance originally mixes mutually with the powder be added, and forms the new liquid-metal layer of one deck.Treat laser beam through after, liquid-metal layer is the cooling solid-state cladding layer of one deck that forms in metallic surface thus rapidly.Laser melting coating can reach the metallicity of large this key position of change, as hardness, wear resistance, thermotolerance, erosion resistance etc.
Traditional press tool, general hardness is low, impact resistance is poor, often can not meet process requirements, popular solution of mould industry circle is, with Hardmetal materials, replace alloy steel material to carry out mfg. moulding die, hardness due to Wimet, the mechanical propertys such as toughness super common alloy steel material far away, so key position is firm not easy to crack, yet can improve 10 times to 40 times die life., the mould that uses Wimet to manufacture, cost also will improve 10-20 doubly, price more will improve more than 20 times, therefore, due to the cost reason, on market, use the Wimet mfg. moulding die can not replace traditional Alloy-steel mold.
Summary of the invention
The object of the present invention is to provide a kind of laser cladding method for the press tool key position, by powder is mixed with the even of body material, make the press tool key position there is higher shock resistance, intensity, toughness, wear resistance, greatly increased the work-ing life of press tool.
In order to address the above problem, technical scheme provided by the invention is: a kind of laser cladding method for the press tool key position comprises:
a.the press tool key position is carried out to pre-treatment;
B. prealloyed powder;
C. by the research stressed to press tool, judge its force part, find that its force part is mostly at key positions such as corners, be subject to mould huge surging force downwards, adopt the mode of coaxial powder-feeding to use laser apparatus to carry out laser melting coating to its key position surface, the laser walking manner adopts the reciprocating linear operation scheme and in cladding process, protection of inert gas is carried out in the laser melting coating zone;
D. subsequent disposal, carry out the later stage machining to the press tool key position surface after cladding.
In above-mentioned step b method, powder used is Co-based alloy powder, and its composition is 12-14% silicon carbide by weight percentage, 0.3-0.5% carbon, 4-6% Calcium Fluoride (Fluorspan), the 4-6% silicon nitride, 1-3% boron, 22-27% chromium, 0.3-0.7% vanadium, 5-7% iron, the 12-18% molybdenum, 1.0-1.4% manganese, surplus is cobalt-based.Above material is 100-200 purpose metal alloy powders.
Above-mentioned laser apparatus is optical fiber laser, and optical maser wavelength is 1.06 μ m, output rating 3000W, and travelling speed is 5-10mm/s, sweep length is 2-5mm, overlapping rate 30-60%, the angle of cut of laser and press tool key position is 83 °-87 °.
The laser apparatus of the above is carbon dioxide laser, and optical maser wavelength is 10.6 μ m, output rating 4000W, and travelling speed is 5-10mm/s, sweep length is 2-5mm, overlapping rate 30-60%, the angle of cut of laser and press tool key position is 83 °-87 °.
Above-mentioned cladding layer thickness is 0.5-4mm.
Rare gas element in above-mentioned step c is nitrogen, argon gas or helium.
In above-mentioned steps d, subsequent disposal comprises that the position that workpiece size or surface accuracy are not met to design requirements carries out the later stage machining.
Pre-treatment in above-mentioned step a comprises removes press tool key position rusty stain, greasy dirt and impurity etc.
After adopting technique scheme, the invention has the beneficial effects as follows:
1) make the press tool key position there is higher shock resistance, intensity, toughness, wear resistance,, greatly increased its work-ing life, be previous 20-40 times.
2) by metallurgical analysis, cladding layer has good internal organizational structure, without bubble, shrinkage cavity, defects i.e.cracks.
3) by the present invention, greatly reduce production cost, increase work efficiency.
The accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 refers to the press tool key position;
Number in the figure is a key position.
Embodiment
Below by specific embodiment, the present invention will be further described
embodiment 1
A kind of laser cladding method for the press tool key position comprises:
A. the press tool key position is carried out to pre-treatment, comprise rusty stain, greasy dirt and the impurity of removing key position.The mode of wherein, removing rusty stain can adopt chemical mode to be eliminated.
B. prefabricated metal powdered alloy, powder is Co-based alloy powder, its composition is by weight percentage: 12 silicon carbide, 0.3% carbon, 4% Calcium Fluoride (Fluorspan), 4% silicon nitride, 1% boron, 22% chromium, 0.3% vanadium, 5% iron, 12% molybdenum, 1.0% manganese, surplus is cobalt-based.Above material is 100-200 purpose metal alloy powders
C. by the research stressed to press tool, judge its force part (as Fig. 1), adopt the mode of coaxial powder-feeding to use optical fiber laser to carry out laser melting coating to its outer corner surface, the laser walking manner adopts the reciprocating linear operation scheme, and optical maser wavelength is 1.06 μ m, and output rating is 3000W, travelling speed is 5mm/s, sweep length is 2mm, overlapping rate 30%, and the angle of cut of laser and press tool key position is 83 °.And in cladding process, nitrogen protection being carried out in the laser melting coating zone, the thickness of cladding layer is 0.5mm.
D. subsequent disposal, carry out the later stage machining to the press tool after cladding, comprises that the position that workpiece size profile or surface accuracy are not met to design requirements carries out the later stage machining.
By metallurgical analysis, find cladding press tool key position afterwards, its hardness value obviously improves, and resistance toheat is good, internal organizational structure densification, pore-free, bubble, defects i.e.cracks.Be previous 20-40 times work-ing life
By comparing with cladding press tool key position before:
Before the press tool cladding, hardness (HRC) is 60, and shock resistance is general;
Hardness after the press tool cladding (HRC) is 68, good impact resistance.
embodiment 2
A kind of laser cladding method for the press tool key position comprises:
A, the press tool key position is carried out to pre-treatment, comprise rusty stain, greasy dirt and the impurity of removing key position.The mode of wherein removing rusty stain can adopt chemical mode to be eliminated;
B. prefabricated metal powdered alloy, powder is Co-based alloy powder, its composition is by weight percentage: 14% silicon carbide, 0.5% carbon, 6% Calcium Fluoride (Fluorspan), 6% silicon nitride, 3% boron, 27% chromium, 0.7% vanadium, 7% iron, 18% molybdenum, 1.4% manganese, surplus is cobalt-based.Above material is 100-200 purpose metal alloy powders;
C. by the research stressed to press tool, judge its force part (as Fig. 1), adopt the mode of coaxial powder-feeding to use carbon dioxide laser to carry out laser melting coating to its outer corner surface, the laser walking manner adopts the reciprocating linear operation scheme, and optical maser wavelength is 10.6 μ m, and output rating is 4000W, travelling speed is 10mm/s, sweep length is 5mm, overlapping rate 60%, and the angle of cut of laser and press tool key position is 87 °.And in cladding process, nitrogen protection being carried out in the laser melting coating zone, the thickness of cladding layer is 4mm;
D. subsequent disposal, carry out the later stage machining to the press tool after cladding, comprises that the position that workpiece size profile or surface accuracy are not met to design requirements carries out the later stage machining.
By metallurgical analysis, find cladding press tool key position afterwards, its hardness value obviously improves, and resistance toheat is good, internal organizational structure densification, pore-free, bubble, defects i.e.cracks.Be previous 20-40 times work-ing life
Within the technical scope that any technician discloses in the present invention, according to technical scheme of the present invention and inventive concept, be equal within the technical scheme of replacing or changing all should fall into protection scope of the present invention.
Claims (9)
1. the laser cladding method for the press tool key position comprises:
A, the press tool key position is carried out to pre-treatment;
B, prealloyed powder;
C, by the stressed research to press tool, judge its force part, find that its force part is mostly at key positions such as corners, be subject to mould huge surging force downwards, adopt the mode of coaxial powder-feeding to use laser apparatus to carry out laser melting coating to its key position surface, the laser walking manner adopts the reciprocating linear operation scheme and in cladding process, protection of inert gas is carried out in the laser melting coating zone;
Subsequent disposal, carry out the later stage machining to the press tool key position surface after cladding.
2. a kind of laser cladding method for the press tool key position according to claim 1, it is characterized in that: in described step b method, powder used is Co-based alloy powder, its composition is 12-14% silicon carbide by weight percentage, 0.3-0.5% carbon, 4-6% Calcium Fluoride (Fluorspan), 4-6% silicon nitride, 1-3% boron, 22-27% chromium, the 0.3-0.7% vanadium, 5-7% iron, 12-18% molybdenum, 1.0-1.4% manganese, surplus is cobalt-based;
Above material is 100-200 purpose metal alloy powders.
3. a kind of laser cladding method for the press tool key position according to claim 1, it is characterized in that: described laser apparatus is optical fiber laser, optical maser wavelength is 1.06 μ m, output rating 3000W, travelling speed is 5-10mm/s, sweep length is 2-5mm, overlapping rate 30-60%, and the angle of cut of laser and press tool key position is 83 °-87 °.
4. a kind of laser cladding method for the press tool key position according to claim 1, it is characterized in that: described laser apparatus is carbon dioxide laser, optical maser wavelength is 10.6 μ m, output rating 4000W, travelling speed is 5-10mm/s, sweep length is 2-5mm, overlapping rate 30-60%, and the angle of cut of laser and press tool key position is 83 °-87 °.
5. a kind of laser cladding method for the press tool key position according to claim 1, it is characterized in that: described cladding layer thickness is 0.5-4mm.
6. a kind of laser cladding method for the press tool key position according to claim 1, it is characterized in that: the rare gas element in described step c is nitrogen, argon gas or helium.
7. a kind of laser cladding method for the press tool key position according to claim 1 is characterized in that: in described steps d, subsequent disposal comprises that the position that workpiece size or surface accuracy are not met to design requirements carries out the later stage machining.
8. a kind of laser cladding method for the press tool key position according to claim 1, it is characterized in that: the pre-treatment in described step a comprises removes press tool key position rusty stain, greasy dirt and impurity etc.
9. a kind of laser cladding method for the press tool key position according to claim 1 is characterized in that: the press tool key position in described step a refers to corner or projection etc.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105603422A (en) * | 2016-03-29 | 2016-05-25 | 烟台泰利汽车模具股份有限公司 | Iron-cobalt-base composite alloy powder for laser cladding and laser cladding method thereof |
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Application publication date: 20140108 |