CN103273200A - Laser cladding restoring method for die steel - Google Patents
Laser cladding restoring method for die steel Download PDFInfo
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- CN103273200A CN103273200A CN2013100936093A CN201310093609A CN103273200A CN 103273200 A CN103273200 A CN 103273200A CN 2013100936093 A CN2013100936093 A CN 2013100936093A CN 201310093609 A CN201310093609 A CN 201310093609A CN 103273200 A CN103273200 A CN 103273200A
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Abstract
The invention provides a laser cladding restoring method for die steel. The method comprises a first step of collecting data, specifically, collecting a hardened zone size H of an HAZ, a valid softening zone size S of the HAZ, a weld width W of the HAZ and a weld depth P of the HAZ, a second step of establishing a Higuchi model and optimizing technological parameters to obtain welding joint characteristic data, and a third step of correcting and optimizing the Higuchi model, inputting the welding joint characteristic data into the corrected and optimized Higuchi model to obtain a weld pass overlap rate in an optimal layer and optimal energy among layers and sending the data to a welder and restoring the die steel. The Higuchi model is optimized and improved firstly, and the die steel is restored through the double-layer tempering technology based on a laser cladding method, so that the weld pass overlap rate in the optimal layer and the optimal energy among the layers are obtained. A die can be fast restored without subsequent heating treatment. The laser cladding restoring method for the die steel is simple, easy to achieve, high in efficiency and high in accuracy and quality, restoring time is saved, and economic benefits are improved.
Description
Technical field
The present invention relates to laser melting coating and repair the field, relate to a kind of laser melting coating restorative procedure of mould steel particularly.
Background technology
Surface abrasion takes place in the process in mould Chang Yinwei under arms, peel off and failure conditions such as crackle, and it is wrong and need carry out REPAIR WELDING to occur change in design or processing in the Mold Making process.Traditional welding and restoring process (as argon arc welding), the heat affected area (HAZ) that toughness is low because hot input quantity causes greatly that mold materials top layer formative tissue is thick, hardness is high.In order to improve tissue and the performance of repairing district HAZ, inevitably need carry out long high temperature postwelding tempering heat treatment (PWHT).Although PWHT is highly profitable to reducing the HAZ hardness number and improving its toughness, it also brings a series of problems usually, adds PWHT equipment and increases cost as needs, mould repair length consuming time and cause that equipment is long-time stops work etc.Therefore, the mould REPAIR WELDING new technology of a kind of PWHT of need not of exploitation has remarkable economic efficiency.
By the retrieval existing literature as can be known, Canonico D A etc. has proposed half welding bead technology (half bead technique) in paper " Half bead welding technique ", Albuquerque D, Victor HC etc. has proposed double-deck temper bead/ annealing bead technology in paper " Effect of nonmetallic inclusion and banding on the success of the two-layer temper bead welding technique ", Lundin C has proposed control deposition technique etc. in paper " Controlled Deposition Techniques for Improvement of Fabrication and Service Performance of Cr-Mo Steels ".The common feature of these technologies is to utilize to reach the postorder welding bead of interlayer in the layer to the drawing effect of preorder welding bead HAZ, obtains the reparation heat affected area that hardness and toughness meet the demands, thereby realizes removing from the purpose of PWHT operation.Wherein double-deck temper bead/ annealing bead technology is widely used recovery technique, and its difficult point is how to determine the sweating heat input combination of the first floor and the second layer (tempering layer) of optimum Match, to obtain optimum tempering layer welding bead to the tempering effect of first floor welding bead HAZ.Generally be to obtain by trial and error method according to the actual welding principle of experience at present, need through repeated tests, and data precision be relatively poor that effect is unsatisfactory.And the Higuchi process optimization model that proposes in recent years carries out theory to derive by based on the actual welding repair data, can simple and directly obtain interlayer heat input combination preferably economically.But this method mainly is at traditional arc-welding restorative procedure, and the influence of its overlapping rate when not considering multi-pass welding, experiment shows, its postorder welding bead of different overlapping rates is also different to the tempering effect of preorder welding bead, and when multi-pass welding, the height of cladding layer is also different under the different overlapping rate situations.
Summary of the invention
At defective of the prior art, the purpose of this invention is to provide a kind of laser melting coating restorative procedure of mould steel.
The invention provides a kind of laser melting coating restorative procedure of mould steel, described method comprises the steps:
The described step of setting up the Higuchi model is as follows:
Step 2.1 is between dividing regions: HAZ is divided into 4 microcells: coarse grain zone, fine grained region, critical zone and effective refined zone;
Step 2.2, the size of selected R, P, H and S technological parameter;
Step 2.3 by the relation between relative position and the size between each microcell of HAZ of analyzing second layer tempering layer welding bead and first floor welding bead, can be set up the Higuchi model.
Preferably, in the step 2.1, the fusing point of described coarse grain zone is that 1000 ℃, the fusing point of fine grained region are that 912～1000 ℃, critical zone fusing point are 727～912 ℃, effectively the refined zone fusing point is 550～727 ℃.
Preferably, in the step 2.1, described coarse grain zone, fine grained region and critical zone are collectively referred to as the harden zone, and defining of described effective refined zone is relevant with concrete repair materials.
Preferably, in the step 2, the harden zone size H that described weld seam characteristic is the heat affected area, effective softened zone size S, molten wide W, fusion penetration P, single track cladding layer area V
0, cladding layer average thickness R ', optimum welding bead overlapping rate a, multi-pass welding cladding layer average thickness R '.
Preferably, in the step 3, when described correction is optimized the Higuchi model and is applicable to the multiple tracks cladding, in the optimum layer welding bead overlapping rate be the postorder welding bead relatively before welding bead overlapping rate in the offset distance of the welding bead layer when equaling the refined zone size, the multiple tracks cladding layer average thickness R ' of ground floor is calculated as follows:
R′=V/[(1-a)*W]
Wherein V is the cladding material of unit interval fusing, and a is a layer interior welding bead overlapping rate, and W is the width of fusion zone;
The heat affected area is divided into harden zone and softened zone, when multi-pass welding, follow-up welding bead has drawing effect to the preorder welding bead, when if the offset distance L of the preceding relatively welding bead of back welding bead equals refined zone size S, the area in tempering zone is not with vanishing, obviously the overlapping rate α between the welding bead is optimum before and after this time, and its computing formula is a=1-S/W;
When multi-pass welding, the floor height difference of different overlapping rate welding beads.Therefore the Higuchi model is done following improvement: with the molten high R of the multiple tracks cladding layer thickness R ' replacement single pass welding of considering the overlapping rate influence.Under the certain situation of technological parameters such as laser power and cladding speed, the cladding material volume V of fusing in the unit interval
0Be constant, establishing overlapping rate is α, and single pass welding is molten wide to be W, and then cladding layer average thickness R ' with the pass of overlapping rate α is: R '=V
0/ ((1-α) * W)
It is as follows to revise the double-deck tempering process parameters model of back Higuchi:
Δ
1＝A
2-A
1＝（P
２+H
２+S
２）-(R′
1+P
1+H
1)＞0
Δ
2＝B
1-B
2＝(R′
1+P
1)-(P
2+H
2)＞0
a=1-S/W
R'=V
0/((1-a)*W)
Wherein,
A
1=R
1+P
1+H
1，A
2=P
2+H
2+S
2，
B
1=R
1+P
1，B
2=P
2+H
2，
P
1Be the fusion penetration of ground floor cladding layer, P
2Fusion penetration for second layer cladding layer;
R
1Be the cladding layer thickness of ground floor, R
2Thickness for second layer cladding layer;
H
1Be the harden zone size of ground floor cladding layer, H
2Harden zone size for second layer cladding layer;
S
1The effectively softening size, S of going for the ground floor cladding layer
2Effective softened zone size for second layer cladding layer.
From top model as can be known, Δ
1Provided the lower limit of interlayer energy density combination, and the Δ in the model
2Provided the higher limit of interlayer energy density combination, overlapping rate a has then provided the postorder welding bead of tempering in the layer and the best overlapping rate between the preorder welding bead.R' represents that then they are molten high different under the different overlapping rate situations, and the multiple tracks laser melting coating that the R' in the model has provided under optimum overlapping rate situation on average melts high computational methods;
In the top process optimization model, 4 formula contain 12 variablees altogether, can not directly obtain interlayer optimal energy density combinations, can only obtain the span of interlayer energy density combination under the different overlapping rate a, so also need further to handle.
Preferably, in the step 3, with described weld seam characteristic bring in the revised optimization Higuchi model in the optimum layer welding bead overlapping rate and interlayer optimal energy be specially:
The model data S and the W that obtain according to experiment then can obtain the theoretical optimum welding bead overlapping rate a of different laser melting coating energy density values correspondences by formula a=1-S/W, obviously energy density not simultaneously, its optimum welding bead overlapping rate a has difference.
Model data V, the W and the overlapping rate a that are obtained by experiment are according to formula R '=V
0/ ((1-α) * W), calculating is under different-energy density, the thickness R ' of its cladding layer during the difference overlapping rate by the P under the different-energy density, H, S, V, W and the optimum welding bead overlapping rate a that calculates and cladding layer thickness R ', calculates the restrictive condition Δ under the different-energy density combinations
1With the condition Δ
2, when obtaining different overlapping rate, all formula Δs that satisfy condition
1＞0 and Δ
2＞0 energy density combination.
Based on top principle, can be met the optimal energy density combinations of condition, under this technological parameter, mould steel is carried out the laser melting coating reparation of the double-deck tempering of multiple tracks, can realize need not the heat treated mould steel of follow-up high tempering and repair fast, its tissue and performance are not less than even are better than tissue and the performance that postwelding carries out tempering heat treatment again.
Preferably, in the step 1, described Δ
1And Δ
2Calculating formula as follows:
Δ
1=A
2-A
1=(P
2+H
2+S
2)-(R
1+P
1+H
1)>0，
Δ
2=B
1-B
2=(R
1+P
1)-(P
2+H
2)>0。
The restrictive condition Δ
1Be to want enough greatly in order to ensure the relative first floor welding bead of the hot input value of tempering layer welding bead, make its effective refined zone (S
2) can " cover " also harden zone (the H of " softening " first floor welding bead HAZ
1), and Δ
1More good on the occasion of the more big tempering effect that means.And the restrictive condition Δ
2Then be the harden zone that forms in order to ensure first floor welding bead can be under the heat effect of tempering layer welding bead by underhardening again.
Preferably, in the step 2, described optimum energy density combinations meets the following conditions simultaneously:
(1) first floor energy density is little;
(2) at Δ
2Under＞0 the prerequisite, select bigger Δ
1Value;
(3) under the uniform prerequisite of cladding layer thickness, select bigger overlapping rate.
Compared with prior art, the present invention has following beneficial effect:
(1) the double-deck tempering laser melting coating restorative procedure of mould steel provided by the invention, hot input quantity and optimum process parameter before and after can accurately controlling between welding bead and the interlayer welding bead, realization need not the mould of subsequent heat treatment and repairs fast.
(2) the invention still further relates to multi-pass welding at double-deck tempering laser melting coating restorative procedure, because being subjected to the influence of overlapping rate in the process, so the present invention has adopted the optimum overlapping rate of welding bead in the quantitative computation layer, and the method for the average cladding layer height of multi-pass welding, the Higuchi model is optimized and improves, adopt double-deck tempering technology that mould steel is repaired based on laser cladding method then, utilize road, back weld seam to the drawing effect of the HAZ of preceding road weld seam, utilize second layer weld seam to the drawing effect of ground floor weld seam HAZ, optimize model by improved Higuchi, the ratio of welding bead overlapping rate and the optimum hot input quantity of interlayer in the layer that is accurately mated, the accurate mould that need not subsequent heat treatment of realizing is repaired fast.
(3) the inventive method is simple, realize easily, and the efficient height, the accuracy rate height, the quality height has been saved repair time, has improved economic benefit.
Description of drawings
By reading the detailed description of non-limiting example being done with reference to the following drawings, it is more obvious that other features, objects and advantages of the present invention will become:
Fig. 1 is each microdistribution of heat affected area and structural transformation schematic diagram;
Fig. 2 is double-deck temper bead/ annealing bead know-why schematic diagram;
Fig. 3 is a layer interior multi-track overlapping schematic diagram;
Fig. 4 is Higuchi test specimen hardness measurement position view.
The specific embodiment
The present invention is described in detail below in conjunction with specific embodiment.Following examples will help those skilled in the art further to understand the present invention, but not limit the present invention in any form.Should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, can also make some distortion and improvement.These all belong to protection scope of the present invention.
Present embodiment relates to a kind of laser melting coating restorative procedure of mould steel, and its method comprises the steps:
Each microdistribution schematic diagram of heat affected area is asked for an interview Fig. 1, wherein A
1727 ℃ of temperature, expression eutectoid reaction temperature.A
2Represent ferritic curie point.A
3727～912 ℃ of temperature ranges, ferritic transformation are that austenitic end of a period line (heating) or austenite change ferritic initial (cooling), A into
41394～1495 ℃ of range temperature, high temperature ferrite change austenitic end of a period line (cooling) into or austenite changes the ferritic initial of high temperature (heating), A into
Cm727～1148 ℃ of temperature ranges, the solubility curve of carbon in austenite also becomes the line of separating out of cementite, and double-deck temper bead/ annealing bead know-why schematic diagram sees also Fig. 2, wherein A
1=R
1+ P
1+ H
1, A
2=P
2+ H
2+ S
2, B
1=R
1+ P
1, B
2=P
2+ H
2, " multi-track overlapping " schematic diagram is asked for an interview Fig. 3.
The present invention adopts at mould steel AISI P20, and the laser melting coating material adopts self-control alloy powder, granularity 100～200 orders.Test used laser melting coating equipment and comprise the semiconductor laser (spot width is 6mm, and laser beam energy is respectively the high cap distribution of gaussian sum at fast axle and slow axis) of 3.5kW, FANUC robot and coaxial powder feeding system etc.Powder feeding rate is 15g/min.Protection gas is pure argon, and flow is 10L/min.
(1) image data: along as shown in Figure 41,2, article 3, traverse the rectilinear direction of HAZ and obtain microhardness value (getting spacing 0.1mm ready), get its mean value and draw the hardness distribution curve, and select for use 550HV as the average hardness value of P20 steel quenching attitude tissue, be used for determining harden zone size H and the effective softened zone size S of HAZ; Molten wide W and fusion penetration P pass through optical microscope measuring; Single track cladding layer area V
0Measure by image software, be used for calculating cladding layer average thickness R '.Can obtain its optimum overlapping rate a and molten high value R ' respectively according to the overlapping rate computing formula of revising Higuchi optimization model and multi-pass welding cladding layer average thickness computing formula.The result is as shown in table 2 for the Higuchi test data.
(2) set up the Higuchi model, optimize technological parameter, get the weld seam characteristic;
The base material that present embodiment adopts is quenching attitude P20 steel, 860 ℃ of its hardening heats, insulation 20min, oil cooling.
Adopt melting and coating process parameter as shown in table 1, obtain the single track Higuchi sample of 4 groups of different laser melting coating energy density values.
Table 1Higuchi test laser cladding technological parameter
Table 2 P20 steel laser melting coating Higuchi test data result
(3) revise optimization Higuchi model, described weld seam characteristic is brought in the revised optimization Higuchi model derive, namely get welding bead overlapping rate and interlayer optimal energy in the optimum layer.
(a) determine optimum welding bead overlapping rate in the layer
As known from Table 2, the laser melting coating energy density is at 5～13.3kJ/cm
2When changing in the scope, theoretical optimum welding bead overlapping rate is in 62%～76% scope, greater than 50% overlapping rate of traditional habit use.Under the prerequisite that can obtain even cladding layer thickness, select bigger overlapping rate to obtain with back welding bead in the layer the drawing effect greatly of preceding welding bead heat affected area, therefore consider the actual conditions of welding, choose the 70% optimum overlapping rate as welding bead in the layer.
(b) derivation of optimum interlayer energy density combination
According to Higuchi laser melting coating optimal model as can be known, realize the optimum tempering effect of interlayer, then the combination of interlayer energy density need be satisfied model condition Δ
1And Δ
2, corresponding cladding layer thickness calculates by model condition R ', in the optimum layer wherein the welding bead overlapping rate be choose previously 70%, formula row that this derives used are as follows a bit:
Δ
1＝A
2-A
1＝(P
2+H
2+S
2)-(R′
1+P
1+H
1)＞0
Δ
1＝B
1-B
2＝(R′
1+P
1)-(P
2+H
2)＞0
R′＝V
0/((1-a)*W)
By calculating as can be known, when overlapping rate is 70%, for the restrictive condition Δ
1, cladding energy density combination 5﹠amp is only arranged; 8.3,5﹠amp; 10,5﹠amp; 13.3 and 8.3﹠amp; 13.3 kJ/cm
2Can satisfy Δ
1＞0, and be not difficult to find that all combinations that satisfy condition have all selected lower first floor energy density values and the tempering layer energy density values higher than the first floor for use, this is because less first floor energy density values can obtain the heat affected area of reduced size, and selects for use a bigger tempering layer energy density values can obtain the drawing effect largely to first floor cladding layer HAZ.For the restrictive condition Δ
2, except 5﹠amp; 13.3kJ/cm
2Outside the combination, other all combinations can both be satisfied Δ
2＞0.This restrictive condition be the harden zone that forms in order to ensure first floor welding bead can be under the heat effect of tempering layer welding bead by underhardening again, and first floor energy density values is at 5～13.3kJ/cm
2All obtain enough big cladding layer thickness in the time of in the scope, had only the interlayer energy density to be combined as 5﹠amp; 13.3kJ/cm
2The time, under maximum this extreme case in first floor cladding layer thickness minimum and tempering layer harden zone, just hardening phenomenon again can take place namely.
Table 3 is the interlayer energy density combination of satisfying two restrictive conditions simultaneously, and from table as can be seen, when optimum overlapping rate 70%, the interlayer energy density combination that can satisfy two restrictive conditions simultaneously has 5﹠amp; 8.3,5﹠amp; 10 and 8.3﹠amp; 13.3kJ/cm
2Three groups, satisfying try one's best under the prerequisite of restrictive condition big principle, 5﹠amp as can be known in the little and tempering layer energy density values of obtaining to try one's best under the good prerequisite that is shaped based on first floor energy density values; 10kJ/cm
2Be the combination of anticipated optimal set interlayer energy density.
During table 3 70% overlapping rate, the combination of the energy density of the formula that satisfies condition
The optimum interlayer energy density of determining according to the Higuchi correction model of P20 mould steel is combined as 5﹠amp; 10kJ/cm
2Select for use this energy density combination that P20 mould steel is carried out the reparation of double-deck tempering laser melting coating, can obtain to be organized as the reparation heat affected area of average tempering sorbite, the about 400HV of average hardness, its repairing effect is better than carrying out the conventional monolayers mould repair technology of follow-up tempering heat treatment.
In sum, the present invention optimizes original Higuchi model, has considered the optimum overlapping rate problem between the interior welding bead of multiple tracks layer in the actual repair process, has also revised its molten high computational methods when multi-pass welding.Based on this process parameter optimizing model, can accurately predict the optimum process parameter of double-deck tempering laser melting coating.The theory that only needs to repair related data by a small amount of actual welding is derived, can simple and directly obtain optimum interlayer energy input combination economically, thereby can only carry out the reparation of double-deck multiple tracks laser melting coating by suitable energy combination to material, and need not follow-up high tempering heat treatment, can obtain repairing the heat affected area microstructure performance in district and hardness with the basically identical repairing effect of mother metal.Improve repairing quality, saved repair time, improved economic benefit.Greatly reduce cost, saved repair time, have remarkable economic efficiency.
More than specific embodiments of the invention are described.It will be appreciated that the present invention is not limited to above-mentioned specific implementations, those skilled in the art can make various distortion or modification within the scope of the claims, and this does not influence flesh and blood of the present invention.
Claims (8)
1. the laser melting coating restorative procedure of a mould steel is characterized in that, described method comprises the steps:
Step 1, image data: each 30 degree and 3 rectilinear directions of traversing HAZ are obtained microhardness value along about the cladding section of weld joint center, get the mean value of described microhardness value and draw the hardness distribution curve, get the harden zone size H of HAZ and effective softened zone size S; Must melt wide W and fusion penetration P by optical microscope measuring;
Step 2 is set up the Higuchi model, optimizes technological parameter, gets the weld seam characteristic;
Step 3, revise and optimize the Higuchi model, with described weld seam characteristic bring in the revised optimization Higuchi model welding bead overlapping rate and interlayer optimal energy in the optimum layer, welding bead overlapping rate and interlayer optimal energy are sent to welding machine in the optimum layer of gained, are the reparation that technological parameter carries out mould steel to get data;
The described step of setting up the Higuchi model is as follows:
Step 2.1 is between dividing regions: HAZ is divided into 4 microcells: coarse grain zone, fine grained region, critical zone and effective refined zone;
Step 2.2, the size of selected R, P, H and S technological parameter, wherein R, P, H and S are respectively molten height, fusion penetration, harden zone, effective softened zone size;
Step 2.3 by the relation between relative position and the size between each microcell of HAZ of analyzing second layer tempering layer welding bead and first floor welding bead, can be set up the Higuchi model.
2. the laser melting coating restorative procedure of mould steel according to claim 1, it is characterized in that, in the step 2.1, the fusing point of described coarse grain zone is that 1000 ℃, the fusing point of fine grained region are that 912～1000 ℃, critical zone fusing point are 727～912 ℃, effectively the refined zone fusing point is 550～727 ℃.
3. the laser melting coating restorative procedure of mould steel according to claim 1 is characterized in that, in the step 2.1, described coarse grain zone, fine grained region and critical zone are collectively referred to as the harden zone, and defining of described effective refined zone is relevant with repair materials.
4. the laser melting coating restorative procedure of mould steel according to claim 1 is characterized in that, in the step 2, and the harden zone size H that described weld seam characteristic is the heat affected area, effective softened zone size S, molten wide W, fusion penetration P, single track cladding layer area V
0, cladding layer average thickness R ', optimum welding bead overlapping rate a, multi-pass welding cladding layer average thickness R '.
5. the laser melting coating restorative procedure of mould steel according to claim 1, it is characterized in that, in the step 3, when described correction optimization Higuchi model is applicable to the multiple tracks cladding, in the optimum layer welding bead overlapping rate be the postorder welding bead relatively before welding bead overlapping rate in the offset distance of the welding bead layer when equaling the refined zone size, the multiple tracks cladding layer average thickness R ' of ground floor is calculated as follows:
R′=V/[(1-a)*W]
Wherein V is the cladding material of unit interval fusing, and a is a layer interior welding bead overlapping rate, and W is for molten wide.
6. the laser melting coating restorative procedure of mould steel according to claim 1 is characterized in that, in the step 3, with described weld seam characteristic bring in the revised optimization Higuchi model in the optimum layer welding bead overlapping rate and interlayer optimal energy be specially:
Step 1 is got P, H, S, V, W, optimum welding bead overlapping rate a and cladding layer thickness R ' under the different-energy density, calculates the restrictive condition Δ by Higuchi optimum process parameter model
1And Δ
2, Δ is satisfied in screening simultaneously
1＞0 and Δ
2＞0 energy density combination;
Step 2, the further screening of energy density combination with step 1 filters out draws the optimal energy density combinations.
7. the laser melting coating restorative procedure of mould steel according to claim 6 is characterized in that, in the step 1, the calculating formula of described Δ 1 and Δ 2 is as follows:
Δ
1=A
2-A
1=(P
2+H
2+S
2)-(R
1+P
1+H
1)>0，
Δ
2=B
1-B
2=(R
1+P
1)-(P
2+H
2)>0，
Wherein,
A
1=R
1+P
1+H
1，A
2=P
2+H
2+S
2，
B
1=R
1+P
1，B
2=P
2+H
2，
P
1Be the fusion penetration of ground floor cladding layer, P
2Fusion penetration for second layer cladding layer;
R
1Be the cladding layer thickness of ground floor, R
2Thickness for second layer cladding layer;
H
1Be the harden zone size of ground floor cladding layer, H
2Harden zone size for second layer cladding layer;
S
1The effectively softening size, S of going for the ground floor cladding layer
2Effective softened zone size for second layer cladding layer.
8. the laser melting coating restorative procedure of mould steel according to claim 6 is characterized in that, in the step 2, described optimum energy density combinations meets the following conditions simultaneously:
(1) first floor energy density is little;
(2) at Δ
2Under＞0 the prerequisite, select bigger Δ
1Value;
(3) under the uniform prerequisite of cladding layer thickness, select bigger overlapping rate.
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| CN103695901A (en) * | 2013-12-27 | 2014-04-02 | 中国科学院半导体研究所 | Method for eliminating multi-channel laser cladding overlapping holes |
| CN104480465A (en) * | 2014-12-24 | 2015-04-01 | 上海交通大学 | Method for manufacturing nickel-based monocrystal high-temperature alloy component by utilizing laser cladding technology |
| CN104656437A (en) * | 2014-12-03 | 2015-05-27 | 郑州轻工业学院 | Method for predicting surface size of laser cladding layer based on processing parameters |
| CN105583522A (en) * | 2016-03-21 | 2016-05-18 | 苏州大学 | Cladding layer lateral overlapping method and device |
| CN106695144A (en) * | 2015-07-17 | 2017-05-24 | 机械科学研究院哈尔滨焊接研究所 | Welding repair method for nuclear power equipment made of low-alloy high-strength steel |
| CN108559995A (en) * | 2018-02-28 | 2018-09-21 | 东北大学 | A kind of method of laser cladding technological parameter optimization in plane |
| CN115319242A (en) * | 2022-07-19 | 2022-11-11 | 广西防城港核电有限公司 | Method for repairing welding defect of valve lip |
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| CN103695901A (en) * | 2013-12-27 | 2014-04-02 | 中国科学院半导体研究所 | Method for eliminating multi-channel laser cladding overlapping holes |
| CN103695901B (en) * | 2013-12-27 | 2016-01-20 | 中国科学院半导体研究所 | Eliminate the method for multi-pass laser cladding overlap joint hole |
| CN104656437A (en) * | 2014-12-03 | 2015-05-27 | 郑州轻工业学院 | Method for predicting surface size of laser cladding layer based on processing parameters |
| CN104656437B (en) * | 2014-12-03 | 2017-07-14 | 郑州轻工业学院 | The method that laser cladding layer surface size is predicted based on machined parameters |
| CN104480465A (en) * | 2014-12-24 | 2015-04-01 | 上海交通大学 | Method for manufacturing nickel-based monocrystal high-temperature alloy component by utilizing laser cladding technology |
| CN106695144A (en) * | 2015-07-17 | 2017-05-24 | 机械科学研究院哈尔滨焊接研究所 | Welding repair method for nuclear power equipment made of low-alloy high-strength steel |
| CN106695144B (en) * | 2015-07-17 | 2020-04-24 | 哈尔滨焊接研究院有限公司 | Welding repair method for nuclear power equipment made of low-alloy high-strength steel |
| CN105583522A (en) * | 2016-03-21 | 2016-05-18 | 苏州大学 | Cladding layer lateral overlapping method and device |
| WO2017161932A1 (en) * | 2016-03-21 | 2017-09-28 | 苏州大学张家港工业技术研究院 | Method and device for laterally overlapping cladding layers |
| CN108559995A (en) * | 2018-02-28 | 2018-09-21 | 东北大学 | A kind of method of laser cladding technological parameter optimization in plane |
| CN115319242A (en) * | 2022-07-19 | 2022-11-11 | 广西防城港核电有限公司 | Method for repairing welding defect of valve lip |
| CN115319242B (en) * | 2022-07-19 | 2023-12-29 | 广西防城港核电有限公司 | Repair method for valve lip welding defect |
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