CN109355580A - A kind of novel plastic mould steel SPM and preparation method thereof - Google Patents
A kind of novel plastic mould steel SPM and preparation method thereof Download PDFInfo
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- CN109355580A CN109355580A CN201811595815.3A CN201811595815A CN109355580A CN 109355580 A CN109355580 A CN 109355580A CN 201811595815 A CN201811595815 A CN 201811595815A CN 109355580 A CN109355580 A CN 109355580A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
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- 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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
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- Mechanical Engineering (AREA)
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- Crystallography & Structural Chemistry (AREA)
- Forging (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses a kind of novel plastic mould steel SPM, are related to mould steel manufacturing technology field.The weight percentage of novel plastic mould steel chemical analysis are as follows: C 0.25-0.29%, Si 0.15-0.35%, Mn 1.40-1.60%, Cr 1.25-1.45%, Mo 0.40-0.60%, Ni 1.10-1.20%, V 0.10-0.20%, P≤0.020, S≤0.003, remaining is Fe and inevitable impurity and microelement.Alloy proportion, system refining techniques, big forging ratio forging technology and the advanced pre- hard treatment process that the present invention optimizes by using uniqueness, so that material has an outstanding comprehensive performance, the various aspects of performance such as the degree of purity and consistency of material, polishing and erosion line performance, harden ability and uniformity of hardness, machining property, heat conductivity, welding performance, toughness and wearability have compared with conventional plastic mould steel to be promoted by a relatively large margin and is optimized.
Description
Technical field
The present invention relates to a kind of mold materials, specially novel pre- duroplasts mould steel, are mainly used for great surface quality and want
The plastic mould asked is related to mould steel manufacturing technology field.
Background technique
Mould industry is the mother of product, is most important basic equipment industry in product manufacturing, main species have the modern designs of plastics,
Stamping die, casting die, forging die, extrusion die, glass molds, wire drawing die, rubber pattern etc., wherein plastic mould accounting 30% or so.Mould
Having material is die ontology base material, is to ensure that the basic key factor of mold performance and quality, and mould steel depending on the application and uses
Condition can be divided into plastic die steel, hot die steel, cold work die steel and high-speed steel etc., and wherein plastic die steel total amount accounts for
Than more than 30%.
Transition and upgrade and innovation and development of the mould industry of China by more than 30 years have achieved world's mold manufacture big country
With big trading nation and constantly accelerate to world's mold make the country prosperous transformation.Along with the development of mould industry, domestic mould steel is special
Industry producer quantity, rolling shapes, credit rating and stability, marketing system establish etc. achieve considerable promotion and into
Step.But domestic mould steel at this stage the problem of and it is insufficient be also it will be apparent that being mainly shown as quality stability and import
Mould steel has a certain gap, the application of innovative development and market is insufficient, kind is not complete enough, system is promoted and brand building dynamics
Deficiency is significantly greater than export volume etc. in the obvious relatively low, import volume of high-end and middle and high-end market occupation rate.
Has the plastic die steel of many decades as a kind of production application, 718 (moral marks 1.2738) are because having preferable erosion
Line processing and polishing performance, the advantages that easy to use, cost is relatively low, cost performance is good, and become the maximum modeling of market dosage
Expect one of mould steel, is widely used in the plastic mould of the products such as automobile interior exterior decorations, household electrical appliances, office equipment, toy, building materials.But
Because its proportioning components not enough optimizes, smelts the factors such as not fine enough, degree of purity is relatively low, cause material in polishing performance, erosion line
There is shortcoming and defect in energy, toughness, processability, heat conductivity, wearability, weldability etc., increasingly cannot be fine
Ground meets the items such as the plastic moulds such as automobile, household electrical appliances Surface Quality, processing efficiency, molding cycle, intensity service life, maintenance maintenance
The requirement of performance quality increasingly promoted.Therefore it needs to carry out existing mould steel innovative improvement and popularization and application.
Summary of the invention
It is an object of the invention to improve common plastic die steel 718/1.2738, a kind of properties are provided and are promoted
Improved novel plastic mould steel SPM.
To achieve the above object, the invention provides the following technical scheme: by the basis of 718/1.2738 composition again
Proportion optimizing, and obtained using relatively finer smelting, more optimized forging technology and relatively special heat treatment process
Obtain the plastic die steel SPM completely newly improved.
718/1.2738 chemical analysis of conventional plastic mould steel are as follows: C 0.36-0.42%, Si 0.20-0.40%, Mn
1.30-1.70%, Cr 1.80-2.10%, Mo 0.15-0.25%, Ni 0.90-1.10%, P≤0.025, S≤0.006, its
Remaining is Fe and impurity.Weight percentage after the optimizing components proportion of steel of the invention are as follows: C 0.25-0.29%, Si
0.20-0.40%, Mn 1.30-1.70%, Cr 1.25-1.45%, Mo 0.40-0.60%, Ni 1.00-1.20%, V
0.10-0.20%, P≤0.020%, S≤0.003%, remaining is Fe and inevitable impurity and microelement.
It is matched according to above-mentioned chemical component, the system using arc melting EF+ external refining LF+ vacuum outgas VD is fine
It smelts, obtains accurate composition, sulphur phosphorus and the lower mold steel ingot of non-metallic inclusion content, and according to correct annealing process
By ingot annealing.
After Heating Steel Ingots to forging temperature, forging is pulled out using the progress pier of Bi≤4 is forged, by steel forging to desired ruler
It is very little, steel are made annealing treatment later.
Steel after annealing are quenched and are tempered (hardness HRC38-42) according to correct heat treatment process, are completed
The manufacture of novel plastic mould steel.
Compared with conventional plastic mould steel 718/1.2738, beneficial effects of the present invention are as follows: novel plastic mould steel SPM
It is matched by the modification of alloying component, using system refinery practice and big forging ratio forging technology, in conjunction with advanced unique pre- hard place
Science and engineering skill makes material have outstanding comprehensive performance, comprising: high cleanliness and consistency, low segregation, tissue fine and even；It is excellent
Good polishing and erosion line process performance；Hardness more it is high more evenly, wearability it is good；Outstanding processability, toughness, heat conductivity,
Welding performance etc..Above-mentioned properties of the invention have different degrees of improvement and promotion than conventional plastic mould steel and
Material cost is only increased slightly, so as to preferably meet the needs of mainstreams such as household electrical appliances, automobile plastic mould is to material and want
It asks, advantageously promotes mould steel upgrading and import substitution, realize good quality and economic benefit.
The SPM technological process of production:
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction in the embodiment of the present invention, it is clear that institute
The embodiment of description is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention,
Every other embodiment obtained by those of ordinary skill in the art without making creative efforts, belongs to this hair
The range of bright protection.
Embodiment
Steps are as follows for a kind of preparation method of novel plastic mould steel SPM:
Step 1: the elementary composition weight percent according to mould steel carries out feed proportioning (C0.25-0.29%, Si
0.20-0.40%, Mn 1.30-1.70%, Cr 1.25-1.45%, Mo0.40-0.60%, Ni 1.00-1.20%, V
0.10-0.20%, remaining be Fe), required raw material is placed in melting in electric arc furnaces, smelting temperature is 1500-1550 DEG C, molten
Refining time 200-250 minute, be transferred to again after sample detection molten iron composition is substantially up to standard LF furnace progress external refining 50-60 minutes,
And necessary fine tuning is carried out to composition, it then carries out vacuum outgas 20-30 minutes in VD vacuum degassing furnace, is being protected after refining
It is poured steel ingot under atmospheric condition, carries out annealing destressing processing after steel ingot is cooling with 700-750 DEG C.
Step 2: selecting forging tonnage to be suitble to for 900-950 DEG C of forging temperature of the Heating Steel Ingots of step 1 to mould steel
Forging press, with not less than 4 forging ratio and requirement size carry out jumping-up forging, obtain mold steel forgings, later by forging
It is made annealing treatment with 700-750 DEG C.
Step 3: 850-880 DEG C of austenitizing temperature of the forging platform stove heating to material to step 2, keep the temperature 30 points
Forging is transferred to be quickly cooled down in quenching bath and quench by (center to Wen Houqi count) after clock, be cooled to 50-70 DEG C of tempering immediately,
At least keeping the temperature 2 hours in 530-550 DEG C selected of tempering temperature, (center to Wen Qiji), tempering no less than twice, obtain
Hardness is HRC38-42 mould steel finished product.
It is detected Step 4: implementing comprehensive examine to the mould steel finished product of step 3, including chemical component, field trash etc.
Grade, hardness, inherent quality (flaw detection), outer dimension and surface quality etc. are put in storage sale after passed examination.
Chemical component inspection is carried out with spectroanalysis instrument to the novel plastic mould steel of embodiment, by measure it is each chemistry at
Divide and contrasted with aforementioned ingredients, all component contents are up to standard.
Novel plastic mould steel Brinell hardness tester or Leeb Hardness Tester to embodiment carry out firmly the both ends of the surface of forging
Degree detection (test point is no less than 5, is evenly distributed), hardness HRC38-42, with section hardness uniformity ± 2HRC.
Ultrasonic wave spy is carried out to the novel plastic mould steel defectoscope of embodiment, according to IV standard of GB/T6402-2008
Wound, detection confirmation forging without white point, crackle, shrinkage cavity, bubble, be mingled with the defects of exist.
Non-metallic inclusion test is carried out to the novel plastic mould steel of embodiment, is examined by method A in GB/T10561
It surveys, it is ≤1.5 that A/B/C/D class, which is slightly thin,.
Shape and dimension control are carried out to the novel plastic mould steel of embodiment, wherein curvature≤3mm/m, total curvature
≤ 0.3%L (L is total length), edges and corners radius of corner R≤10mm., section cut gradient≤10mm；Size meet thickness 0~+
The deviation regulation of 10mm, 0~+15mm of width.
Surface quality inspection is carried out to the novel plastic mould steel of embodiment, confirms material surface flawless, folding, knot
Scar, the defects of being mingled with, oxide skin are removed clean.
Novel plastic mould steel SPM has promoted and applied many years, material maturity height.According to the verification test situation of material,
The use of comprehensive market client is fed back and related identification, now by the main performance or index comparison of SPM and 1.2738 two kinds of materials
It is described as follows:
Although an embodiment of the present invention has been shown and described, for those of ordinary skills, Ke Yili
Solution without departing from the principles and spirit of the present invention can to these embodiments carry out it is a variety of variation, modification, replacement and
Modification, the scope of the present invention is defined by the appended.
Claims (2)
1. a kind of novel plastic mould steel SPM, compositional characteristic are: the mould steel includes that following weight percent is former
Material: C 0.25-0.29, Si 0.15-0.35, Mn 1.4-1.6, Cr1.25-1.45, Mo0.40-0.60, Ni1.1-1.2, V
0.1-0.15, P≤0.02, S≤0.003, remaining is Fe and inevitable impurity.
2. a kind of preparation method of novel plastic mould steel SPM, it is characterised in that:
Step 1: required raw material is placed in melting in electric arc furnaces, smelting temperature is 1500-1550 DEG C, sample detection molten iron
LF furnace is transferred to after composition is up to standard again to carry out external refining 60-100 minutes, vacuum outgas is then carried out in VD vacuum degassing furnace
20-30 minutes, steel ingot is poured after refining under the conditions of protective atmosphere, carries out annealing destressing after steel ingot is cooling with 700-750 DEG C
Processing.
Step 2: selecting and forging tonnage suitable forging 900-950 DEG C of forging temperature of the Heating Steel Ingots of step 1 to mould steel
Press, with not less than 4 forging ratio and requirement size carry out jumping-up forging, obtain mold steel forgings, later by forging with
700-750 DEG C is made annealing treatment.
Step 3: after 850-880 DEG C of austenitizing temperature of the forging platform stove heating to material to step 2, heat preservation 30 minutes
Forging is transferred to be quickly cooled down in quenching bath and quench by (counting at center to Wen Houqi), is cooled to 50-70 DEG C and is tempered, is selecting immediately
530-550 DEG C fixed of tempering temperature at least keeps the temperature 2 hours, and (center to Wen Qiji), tempering no less than twice, obtain hardness
For HRC38-42 mould steel finished product.
Step 4: to the mould steel finished product of step 3 implement it is comprehensive examine detection, including it is chemical component, field trash grade, hard
Degree, inherent quality (flaw detection), outer dimension and surface quality etc. are put in storage sale after passed examination.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811595815.3A CN109355580A (en) | 2018-12-25 | 2018-12-25 | A kind of novel plastic mould steel SPM and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811595815.3A CN109355580A (en) | 2018-12-25 | 2018-12-25 | A kind of novel plastic mould steel SPM and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110016537A (en) * | 2019-03-20 | 2019-07-16 | 江阴兴澄特种钢铁有限公司 | A kind of production method of plastic mould steel refining ingot casting low-sulfur, phosphorus and low inclusion content |
| CN113881893A (en) * | 2021-09-10 | 2022-01-04 | 北京科技大学 | Rare earth Ce reinforced hot-work plastic die steel |
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| CN101311293A (en) * | 2007-05-24 | 2008-11-26 | 宝山钢铁股份有限公司 | Large-scale mold module and method for manufacturing same |
| CN102268599A (en) * | 2011-08-01 | 2011-12-07 | 南京钢铁股份有限公司 | Production technology of non-modulated plastic die steel thick plate |
| CN102286698A (en) * | 2010-06-17 | 2011-12-21 | 宝山钢铁股份有限公司 | Plastic mold steel and manufacture method thereof |
| CN104674132A (en) * | 2013-11-27 | 2015-06-03 | 斗山重工业株式会社 | Hybrid mold steel and manufacturing method thereof |
| CN107974623A (en) * | 2017-12-22 | 2018-05-01 | 浙江天基重工机械有限公司 | A kind of plastic die steel and preparation method thereof |
-
2018
- 2018-12-25 CN CN201811595815.3A patent/CN109355580A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101311293A (en) * | 2007-05-24 | 2008-11-26 | 宝山钢铁股份有限公司 | Large-scale mold module and method for manufacturing same |
| CN102286698A (en) * | 2010-06-17 | 2011-12-21 | 宝山钢铁股份有限公司 | Plastic mold steel and manufacture method thereof |
| CN102268599A (en) * | 2011-08-01 | 2011-12-07 | 南京钢铁股份有限公司 | Production technology of non-modulated plastic die steel thick plate |
| CN104674132A (en) * | 2013-11-27 | 2015-06-03 | 斗山重工业株式会社 | Hybrid mold steel and manufacturing method thereof |
| CN107974623A (en) * | 2017-12-22 | 2018-05-01 | 浙江天基重工机械有限公司 | A kind of plastic die steel and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110016537A (en) * | 2019-03-20 | 2019-07-16 | 江阴兴澄特种钢铁有限公司 | A kind of production method of plastic mould steel refining ingot casting low-sulfur, phosphorus and low inclusion content |
| CN113881893A (en) * | 2021-09-10 | 2022-01-04 | 北京科技大学 | Rare earth Ce reinforced hot-work plastic die steel |
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Application publication date: 20190219 |