CN108118332A - A kind of method for improving warm and hot forging die life - Google Patents
A kind of method for improving warm and hot forging die life Download PDFInfo
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- CN108118332A CN108118332A CN201711128258.XA CN201711128258A CN108118332A CN 108118332 A CN108118332 A CN 108118332A CN 201711128258 A CN201711128258 A CN 201711128258A CN 108118332 A CN108118332 A CN 108118332A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/07—Alloys based on nickel or cobalt based on cobalt
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0047—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents
- C22C32/0052—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents only carbides
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mounting, Exchange, And Manufacturing Of Dies (AREA)
- Forging (AREA)
Abstract
The invention discloses a kind of methods for improving warm and hot forging die life, mold is successively by forging and stamping, annealing, quenching, tempering and laser melting and coating process, die ＆ mold treatment technique and laser melting and coating process are combined by the present invention, form a set of brand-new mold method of hot forging, forging internal stress, crystal grain thinning are eliminated by heat treatment process, die hardness is promoted to homogenize, the excellent cladding layer of wear-resisting property is formed by laser melting and coating process, reduce influence of the general wear to die life, die life is improved, reduces enterprise operation cost.
Description
Technical field
The present invention relates to hot forged mould processing technique field, in particular to a kind of side for improving warm and hot forging die life
Method.
Background technology
In machine industry, various hot forged moulds can be rated as the mother of forging.In use, forging mold early stage
Internal break phenomenon is very serious, and some molds make a call to tens and occur as soon as fatigue crack, and some die cavitys cave in.It is existing from forging
Field, which is investigated the cause, recognizes that the annual loss from spoilage of extraordinary die steel using 5CrNiMo materials as representative has 20 tons or more, market
Economic value counts roughly 320,000 yuan, and loss caused by schedule delays is more difficult to estimate.Therefore, the hot forged mould service life is shorter, is always
The a difficult problem that one big problem of forging industry and manufacturing enterprise develop production.
For many years, for domestic and international professional to solve the above problems, constantly promoting Service Life of Hot Forging Die, progress is big
The scientific research of amount and extensive production practices, such as：The special new material of hot-work die is constantly developed, strengthening process equipment carries
High mold design and manufacturing technology level have promoted the technological progress of mould manufacturing industry, but overall is not still very good.
The content of the invention
The present invention provides a kind of methods for improving warm and hot forging die life.
To achieve the above object, the present invention provides following technical solution：
A kind of method for improving warm and hot forging die life, mold melt successively by forging and stamping, annealing, quenching, tempering and laser
Coating process specifically includes following steps：
S1：Forging and stamping, the initial temperature of forging is 1200-1300 DEG C, and final forging temperature is not less than 800 DEG C, air-cooled 30-60s, if
Final forging temperature is excessively high, easily forms coarse grain, mold mechanical property is reduced, conversely, the forging and stamping degradation of mold；
S2：Mold is heated to 800-820 DEG C, keeps the temperature 4-5h, be cooled to less than 380 DEG C, come out of the stove, be air-cooled to room by annealing
Temperature inspects 4 points by random samples, when hardness is 185HB-210HB, carries out step S3, conversely, repeating step S2；
S3：Mold is heated to 850-870 DEG C by quenching, keeps the temperature 5-6h, and heating process uses gradient increased temperature mode, comes out of the stove,
750-780 DEG C is cooled to, mold is placed in quenching oil, oil cooling is to 180-200 DEG C；
S4：Tempering, temperature are 450-470 DEG C, and single tempering time is 6-8h, and times of tempering is no less than 1 time, adjacent
The double tempering time is no more than 4-6h；
S5：Laser melting coating, cladding powder include 5% mesoporous tungsten carbide and 95%Co base alloy powders, the output of laser
Power is 2.5-3kW, and scanning linear velocity is 30-35mm/s, powder feed rate 25-30g/min.
Using high power laser and high scanning linear velocity, after die surface forms molten bath, laser can be rapidly directed away from
Molten bath, the cladding powder fast cooling of melting form the tiny cladding layer of crystal grain, improve the hardness and wearability of cladding layer
Can, in addition, in the process, laser melting coating is few to the heat radiation of mold, avoids generating reheat crack(ing) or bubble, improve mold
Service life.
Inventor has found in long-term practice：Hot forged mould in use, due to bearing at high temperature for a long time repeatedly
Machinery and alternating load, when cavity surface temperature is up to 500 DEG C or more, mold easily generates heat fatigue cracking, high-temperature oxydation, height
Temperature abrasion etc., causes local location to fail, and high temperature wear is hot forged mould main failure forms, therefore, improves mold high temperature
Polishing machine is to improve the key factor of its service life.On this basis, inventor is to the work in cladding powder, cladding process
Skill parameter is improved, and to obtain the uniform cladding layer of hardness, improves the high temperature wear resistant performance of mold.
Further, in the step S3, during gradient increased temperature, heating rate is less than 200 DEG C/h, and temperature is 350
DEG C, 540 DEG C, 720 DEG C when, keep the temperature 1-1.5h.
Further, in the step S4, following steps are specifically included：
S41：When mold is middle-size and small-size, height is less than 375mm, and times of tempering is 1-2 times, and the adjacent double tempering time is not
More than 6h, 4 points are inspected by random samples, when hardness is 39HB-47HB, carry out step S5, conversely, repeating step S4；
S42：When mold is large-scale, height is more than 375mm, and times of tempering is 3-5 times, and the adjacent double tempering time does not surpass
4h is crossed, inspects 4 points by random samples, when hardness is 32HB-36HB, carries out step S5, conversely, repeating step S4.
Further, Co base alloy powders include following mass fraction recipe ingredient：
Fe70-76 parts, Cr15-17 parts, Nr5-7 parts, Mo1.5-1.9 parts, Mn0.4-0.46 parts, Nb 0.085-0.095
Part, 1.11-1.14 parts of Co, 0.03-0.05 parts of Ti.
Further, in the step S5, following steps are specifically included：
S51：Clear up die surface；
S52：Mold is cut or is ground, processing capacity 0.5-3mm, if processing capacity is excessive, it is necessary to laser melting coating
Cladding layer is thicker, adds cladding cost, is specially：
As processing capacity≤2.0mm, in one layer of laser cladding layer of die surface cladding；
As processing capacity ＞ 2.0mm, in two layers of laser cladding layer of die surface cladding.
Further, machining is further included after the step S5, surplus is left between the overall thickness and processing capacity of cladding layer,
The surplus is 0.5-0.8mm, carries out machining to the die surface after cladding, machining amount is equal with surplus.
Inventor has found in long-term practice：At clad layer surface 0.5-0.8mm, the hardness of cladding layer and wear-resisting
Therefore performance, leaves surplus, i.e. cladding layer is higher than mold apparently higher than other regions between the overall thickness and processing capacity of cladding layer
Originally surface 0.5-0.8mm regard the best region of hardness and wear-resisting property as the new surface of mold, hence it is evident that increase by machining
Add the wear-resisting property and service life of mold.
Further, in the step S5, the distance of laser output and die surface is 400-410mm, and laser facula is
Square, the hot spot length of side is 4.8-5.2mm.
The beneficial effects of the invention are as follows：
1st, die ＆ mold treatment technique and laser melting and coating process are combined, form a set of brand-new mold method of hot forging,
Forging internal stress, crystal grain thinning are eliminated by heat treatment process, die hardness is promoted to homogenize, is formed by laser melting and coating process
The excellent cladding layer of wear-resisting property reduces influence of the general wear to die life, improves die life, reduces enterprise's warp
Seek cost.
2nd, mesoporous tungsten carbide and base alloy powder are subjected to proportioning and form new cladding powder, meanwhile, adjust cladding process
In technological parameter, to achieve the purpose that cladding layer does not have a crackle, cladding layer is from top to bottom all by carbide hard phase composition, firmly
Degree is uniform.When mold works under 600 DEG C of high temperature, due to the effect of carbide hard phase, the high temperature abrasion resistance of cladding layer is compared
Die matrix improves 3 times, and high temperature wear form is based on oxidative wear.
Specific embodiment
Below in conjunction with the embodiment of the present invention, the technical solution in the embodiment of the present invention is clearly and completely described,
Obviously, described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, those of ordinary skill in the art's all other embodiments obtained without making creative work, all
Belong to the scope of protection of the invention.
Embodiment one：
The present embodiment by warm and hot forging material be 5CrNiMo, highly for the middle-size and small-size mold of 260mm exemplified by, mold passes through successively
Cross forging and stamping, annealing, quenching, tempering and laser melting and coating process.
A kind of method for improving warm and hot forging die life, specifically includes following steps：
S1：Forging and stamping, the initial temperature of forging is 1200 DEG C, and final forging temperature is 800 DEG C, air-cooled 30s.
S2：Mold is heated to 800 DEG C, keeps the temperature 4h, be cooled to 370 DEG C, come out of the stove, be air-cooled to room temperature, inspects 4 by random samples by annealing
Point when hardness is 185HB-210HB, carries out step S3, conversely, repeating step S2.
S3：Quenching, mold is heated, and heating process uses gradient increased temperature mode, and heating rate is 180 DEG C/h, and
When temperature is 350 DEG C, 540 DEG C, 720 DEG C, 1h is kept the temperature, is heated to 850 DEG C, 5h is kept the temperature, comes out of the stove, be cooled to 750 DEG C, mold is put
In quenching oil, oil cooling is to 180 DEG C.
S4：Tempering, temperature are 450 DEG C, tempering time 6h, and times of tempering is 1 time, inspects 4 points by random samples, and hardness is
During 39HB-47HB, step S5 is carried out, conversely, repeating step S4.
S5：Laser melting coating, cladding powder include 5% mesoporous tungsten carbide and 95%Co base alloy powders, the output of laser
Power is 2.5kW, and scanning linear velocity is 30mm/s, powder feed rate 25g/min, and the distance of laser output and die surface is
400mm, laser facula are square, and the hot spot length of side is 4.8mm, is specifically included：
S51：Clear up die surface；
S52：Mold is cut or is ground, processing capacity 0.5mm, in one layer of laser cladding layer of die surface cladding.
S6：Machining leaves surplus between the overall thickness and processing capacity of cladding layer, the surplus is 0.5mm, after cladding
Die surface carry out machining, machining amount is equal with surplus.
Wherein, Co base alloy powders include following mass fraction recipe ingredient：Fe70 parts, Cr15 parts, Nr5 parts, Mo1.5
Part, Mn0.4 parts, 0.085 part of Nb, 1.11 parts of Co, 0.03 part of Ti.
Embodiment two：
The present embodiment by warm and hot forging material be 5CrNiMo, highly for the middle-size and small-size mold of 370mm exemplified by, mold passes through successively
Cross forging and stamping, annealing, quenching, tempering and laser melting and coating process.
A kind of method for improving warm and hot forging die life, specifically includes following steps：
S1：Forging and stamping, the initial temperature of forging is 1250 DEG C, and final forging temperature is 830 DEG C, air-cooled 40s.
S2：Mold is heated to 810 DEG C, keeps the temperature 4.5h, be cooled to 320 DEG C, come out of the stove by annealing, is air-cooled to room temperature, sampling observation 4
It is a, when hardness is 185HB-210HB, step S3 is carried out, conversely, repeating step S2.
S3：Quenching, mold is heated, and heating process uses gradient increased temperature mode, and heating rate is 150 DEG C/h, and
When temperature is 350 DEG C, 540 DEG C, 720 DEG C, 1-1.5h is kept the temperature, is heated to 860 DEG C, 5.5h is kept the temperature, comes out of the stove, is cooled to 760 DEG C, it will
Mold is placed in quenching oil, and oil cooling is to 190 DEG C.
S4：Tempering, temperature are 460 DEG C, and single tempering time is 7h, and times of tempering is 2 times, during adjacent double tempering
Between be no more than 6h, inspect 4 points by random samples, when hardness is 39HB-47HB, carry out step S5, conversely, repeating step S4.
S5：Laser melting coating, cladding powder include 5% mesoporous tungsten carbide and 95%Co base alloy powders, the output of laser
Power is 2.8kW, and scanning linear velocity is 33mm/s, powder feed rate 26g/min, and the distance of laser output and die surface is
408mm, laser facula are square, and the hot spot length of side is 5.0mm, is specifically included：
S51：Clear up die surface；
S52：Mold is cut or is ground, processing capacity 2.5mm, in two layers of laser cladding layer of die surface cladding.
S6：Machining leaves surplus between the overall thickness and processing capacity of cladding layer, the surplus is 0.6mm, after cladding
Die surface carry out machining, machining amount is equal with surplus.
Wherein, Co base alloy powders include following mass fraction recipe ingredient：Fe73 parts, Cr16 parts, Nr6 parts, Mo1.7
Part, Mn0.43 parts, 0.09 part of Nb, 1.12 parts of Co, 0.04 part of Ti.
Embodiment three：
The present embodiment by warm and hot forging material be 5CrNiMo, highly for the large mold of 380mm exemplified by, mold passes through successively
Forging and stamping, annealing, quenching, tempering and laser melting and coating process.
A kind of method for improving warm and hot forging die life, specifically includes following steps：
S1：Forging and stamping, the initial temperature of forging is 1300 DEG C, and final forging temperature is 850 DEG C, air-cooled 60s.
S2：Mold is heated to 820 DEG C, keeps the temperature 5h, be cooled to 375 DEG C, come out of the stove, be air-cooled to room temperature, inspects 4 by random samples by annealing
Point when hardness is 185HB-210HB, carries out step S3, conversely, repeating step S2.
S3：Quenching, mold is heated, and heating process uses gradient increased temperature mode, and heating rate is 170 DEG C/h, and
When temperature is 350 DEG C, 540 DEG C, 720 DEG C, 1.5h is kept the temperature, is heated to 870 DEG C, 6h is kept the temperature, comes out of the stove, be cooled to 780 DEG C, by mold
Quenching oil is placed in, oil cooling is to 200 DEG C.
S4：Tempering, temperature are 470 DEG C, and single tempering time is 6h, and times of tempering is 3 times, during adjacent double tempering
Between be no more than 4h, inspect 4 points by random samples, when hardness is 32HB-36HB, carry out step S5, conversely, repeating step S4.
S5：Laser melting coating, cladding powder include 5% mesoporous tungsten carbide and 95%Co base alloy powders, the output of laser
Power is 3kW, and scanning linear velocity is 35mm/s, powder feed rate 30g/min, and the distance of laser output and die surface is
410mm, laser facula are square, and the hot spot length of side is 5.2mm, is specifically included：
S51：Clear up die surface；
S52：Mold is cut or is ground, processing capacity 1.5mm, in one layer of laser cladding layer of die surface cladding.
S6：Machining leaves surplus between the overall thickness and processing capacity of cladding layer, the surplus is 0.8mm, after cladding
Die surface carry out machining, machining amount is equal with surplus.
Wherein, Co base alloy powders include following mass fraction recipe ingredient：Fe76 parts, Cr17 parts, Nr7 parts, Mo1.9
Part, Mn0.46 parts, 0.095 part of Nb, 1.14 parts of Co, 0.05 part of Ti.
Example IV：
The present embodiment by warm and hot forging material be 5CrNiMo, highly for the large mold of 540mm exemplified by, mold passes through successively
Forging and stamping, annealing, quenching, tempering and laser melting and coating process.
A kind of method for improving warm and hot forging die life, specifically includes following steps：
S1：Forging and stamping, the initial temperature of forging is 1280 DEG C, and final forging temperature is 820 DEG C, air-cooled 50s.
S2：Mold is heated to 810 DEG C, keeps the temperature 5h, be cooled to 330 DEG C, come out of the stove, be air-cooled to room temperature, inspects 4 by random samples by annealing
Point when hardness is 185HB-210HB, carries out step S3, conversely, repeating step S2.
S3：Quenching, mold is heated, and heating process uses gradient increased temperature mode, and heating rate is 200 DEG C/h, and
When temperature is 350 DEG C, 540 DEG C, 720 DEG C, 1.5h is kept the temperature, is heated to 870 DEG C, 6h is kept the temperature, comes out of the stove, be cooled to 780 DEG C, by mold
Quenching oil is placed in, oil cooling is to 200 DEG C.
S4：Tempering, temperature are 460 DEG C, and single tempering time is 8h, and times of tempering is 5 times, during adjacent double tempering
Between be no more than 4h, inspect 4 points by random samples, when hardness is 32HB-36HB, carry out step S5, conversely, repeating step S4.
S5：Laser melting coating, cladding powder include 5% mesoporous tungsten carbide and 95%Co base alloy powders, the output of laser
Power is 2.8kW, and scanning linear velocity is 34mm/s, powder feed rate 29g/min, and the distance of laser output and die surface is
408mm, laser facula are square, and the hot spot length of side is 5.1mm, is specifically included：
S51：Clear up die surface；
S52：Mold is cut or is ground, processing capacity 2.5mm, in two layers of laser cladding layer of die surface cladding.
S6：Machining leaves surplus between the overall thickness and processing capacity of cladding layer, the surplus is 0.7mm, after cladding
Die surface carry out machining, machining amount is equal with surplus.
Wherein, Co base alloy powders include following mass fraction recipe ingredient：Fe76 parts, Cr16 parts, Nr6 parts, Mo1.8
Part, Mn0.45 parts, 0.095 part of Nb, 1.14 parts of Co, 0.04 part of Ti.
Comparative example one：
The present embodiment part identical with embodiment one repeats no more, unlike：
Tempering time is 6h, and times of tempering is 1 time.
Comparative example two：
The present embodiment part identical with embodiment two repeats no more, unlike：
Mold is successively by forging and stamping, annealing, quenching, tempering process, without laser melting and coating process.
Comparative example three：
The present embodiment part identical with embodiment three repeats no more, unlike：
Single tempering time is 6h, and times of tempering is 1 time.
Comparative example four：
The present embodiment part identical with example IV repeats no more, unlike：
Mold is successively by forging and stamping, annealing, quenching, tempering process, without laser melting and coating process.
Contrast test：
To the mold of embodiment one to four, one to four warm and hot forging of comparative example, performance detection is carried out in same position, draws reality
Test data such as table 1：
Table 1：
Above-mentioned experiment is carried out in Shandong energy refitting southern Shandong equipment manufacturing Co., Ltd of group laboratory by as above testing
Data are analyzed as follows：
The mold of one to four warm and hot forging of embodiment, inner hardness is uniform, and cladding layer has high temperature abrasion resistance, forges
800 or so fashion can use, and improve the service life of mold, reduce enterprise operation cost.
Comparative example one and comparative example three are insufficient due to being tempered, and cause mold temper number high, although cladding layer has
High temperature abrasion resistance still, since mould inside hardness is uneven, causes always to forge the forging that number of packages is significantly less than embodiment one to four
Piece number.
Comparative example two and comparative example four cause mold to avoid not having high temperature abrasion resistance due to not carrying out laser melting coating, into
And cause always to forge number of packages minimum.
Moreover, it will be appreciated that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
Using specification as an entirety, the technical solutions in each embodiment can also be properly combined, forms those skilled in the art
It is appreciated that other embodiment.
Claims (7)
- A kind of 1. method for improving warm and hot forging die life, which is characterized in that mold is successively by forging and stamping, annealing, quenching, tempering And laser melting and coating process, specifically include following steps：S1：Forging and stamping, the initial temperature of forging is 1200-1300 DEG C, and final forging temperature is not less than 800 DEG C, air-cooled 30-60s；S2：Mold is heated to 800-820 DEG C, keeps the temperature 4-5h, be cooled to less than 380 DEG C, come out of the stove, be air-cooled to room temperature, taken out by annealing 4 points are examined, when hardness is 185HB-210HB, carry out step S3, conversely, repeating step S2；S3：Mold is heated to 850-870 DEG C by quenching, keeps the temperature 5-6h, and heating process uses gradient increased temperature mode, comes out of the stove, and cools down To 750-780 DEG C, mold is placed in quenching oil, oil cooling is to 180-200 DEG C；S4：Tempering, temperature are 450-470 DEG C, and single tempering time is 6-8h, and times of tempering is no less than 1 time, it is adjacent twice Tempering time is no more than 4-6h；S5：Laser melting coating, cladding powder include 5% mesoporous tungsten carbide and 95%Co base alloy powders, the output power of laser For 2.5-3kW, scanning linear velocity is 30-35mm/s, powder feed rate 25-30g/min.
- 2. a kind of method for improving warm and hot forging die life according to claim 1, it is characterised in that：The step S3 In, during gradient increased temperature, heating rate be less than 200 DEG C/h, and temperature be 350 DEG C, 540 DEG C, 720 DEG C when, keep the temperature 1- 1.5h。
- 3. a kind of method for improving warm and hot forging die life according to claim 1, it is characterised in that：The step S4 In, specifically include following steps：S41：When mold height is less than 375mm, times of tempering is 1-2 times, and the adjacent double tempering time is no more than 6h, inspects 4 by random samples Point when hardness is 39HB-47HB, carries out step S5, conversely, repeating step S4；S42：When mold height is more than 375mm, times of tempering is 3-5 times, and the adjacent double tempering time is no more than 4h, inspects 4 by random samples Point when hardness is 32HB-36HB, carries out step S5, conversely, repeating step S4.
- 4. according to the method for claim 2-3 any raising warm and hot forging die lifes a kind of, it is characterised in that：Co bases close Bronze end includes following mass fraction recipe ingredient：Fe70-76 parts, Cr15-17 parts, Nr5-7 parts, Mo1.5-1.9 parts, Mn0.4-0.46 parts, 0.085-0.095 parts of Nb, Co 1.11-1.14 parts, 0.03-0.05 parts of Ti.
- 5. a kind of method for improving warm and hot forging die life according to claim 4, it is characterised in that：The step S5 In, specifically include following steps：S51：Clear up die surface；S52：Mold is cut or is ground, processing capacity 0.5-3mm is specially：As processing capacity≤2.0mm, in one layer of laser cladding layer of die surface cladding；As processing capacity ＞ 2.0mm, in two layers of laser cladding layer of die surface cladding.
- 6. a kind of method for improving warm and hot forging die life according to claim 5, it is characterised in that：The step S5 it After further include machining, leave surplus between the overall thickness and processing capacity of cladding layer, the surplus is 0.5-0.8mm, to cladding Die surface afterwards carries out machining, and machining amount is equal with surplus.
- 7. a kind of method for improving warm and hot forging die life according to claim 5, it is characterised in that：The step S5 In, the distance of laser output and die surface is 400-410mm, and laser facula is square, and the hot spot length of side is 4.8-5.2mm.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN108746374A (en) * | 2018-07-20 | 2018-11-06 | 重庆大学 | A kind of preparation method of the hot stamping forming die insert with conformal cooling channel |
| CN109530592A (en) * | 2018-11-30 | 2019-03-29 | 攀枝花市科发机械制造有限公司 | A kind of high speed steel shaft forging technology |
| CN111872294A (en) * | 2020-07-14 | 2020-11-03 | 山东能源重装集团金源机械有限公司 | Method for improving forging processing quality of petroleum elevator |
| CN114351135A (en) * | 2021-12-15 | 2022-04-15 | 方智模具技术(昆山)有限公司 | High-performance die and preparation process thereof |
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