CN107574295A - Aluminium alloy casting die steel production technology - Google Patents
Aluminium alloy casting die steel production technology Download PDFInfo
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- CN107574295A CN107574295A CN201710963017.0A CN201710963017A CN107574295A CN 107574295 A CN107574295 A CN 107574295A CN 201710963017 A CN201710963017 A CN 201710963017A CN 107574295 A CN107574295 A CN 107574295A
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- forging
- casting die
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Abstract
A kind of aluminium alloy casting die steel production technology of the present invention, its processing step are：A, 200mm Electro Slag Remelting Steel hot rollings are forged into required geomery forging stock；B, forging stock low temperature enters the preheating of stove two-stage, and one-level preheats 450 DEG C ~ 500 DEG C, is incubated 1 ~ 2.0h；Two level preheats 850 DEG C ~ 900 DEG C insulation 3min/mm；C, forging of coming out of the stove after 1160 DEG C ~ 1180 DEG C full and uniform heating and thermal insulations is to slowly warm up to after preheating insulation, 1100 DEG C ~ 1130 DEG C light hammer of initial forging temperature is beaten soon；When d, close to 960 DEG C ~ 1020 DEG C of final forging temperature；E, after last fiery forging and molding, forging direction is changed；F, multiply after forging stock is qualified in high waste heat return stove and be heated to 1100 ± 5 DEG C, oil quenching after insulation；G, forging stock carries out 740 ± 5 DEG C, 2 ~ 3h high temperings, air cooling；The present invention can increase substantially Die-casting Die Life.
Description
Technical field
The present invention relates to mold steel production method, and in particular to aluminium alloy casting die steel production technology.
Background technology
Hardware aluminium alloy casting die is few without cutting advanced Special Processes of Metal Castings technique, and stock utilization is up to 95%, castable to produce
The complex-shaped and thin-wall precise hardware of low roughness value.Aluminium alloy casting die condition of work is severe, at a high speed, high pressure and
Shaped under high temperature, bear high alternating hot and cold stress and mechanical stress comprehensive function, statistic data at home and abroad shows that the mould is main
Failure mode ratio：Heat fatigue cracking 60% ~ 70%, collapse block and fracture 15% ~ 25%, plastic deformation 15% ~ 20%, melting loss and erosion
5% ~ 10% and die casting not easy mold release and presentation quality difference etc..Compared with foreign countries, identical product, domestic aluminium alloy compression casting are produced
Mould service life is only the 1/2 of external industrially developed country.Therefore, it is necessary to greatly develop new material, promote new technology, meet head on to catch up with
Upper industrially developed country's level, participate in competition in the international market.
Though the steel ingot in existing aluminium alloy casting die steel technique, through split rolling method, alloy carbide has to be crushed to a certain degree,
But often along rolling direction in banding, net distribution, and matrix center portion then in chain, large grained and heaps shape distribution, center portion
It is alloy carbide >=5 grade, exceeded, mechanical property is had obvious directionality.Die Casting requires alloy carbide≤3 grade with steel.
Therefore, it is necessary to forged, not only obtain needed for forging stock geomery, it is often more important that smash carbide and with worrying strong modeling
Shape flowing is uniformly distributed in steel matrix, reaches center portion carbide≤3 grade, and carbonization pattern is fully improved, and becomes brittle carbides
To strengthen carbide.
The content of the invention
The technical problems to be solved by the invention are：It is hard that offer one kind is remarkably improved compression mod steel elevated temperature strength, high temperature
Degree, heat endurance, the aluminium alloy casting die steel production technology of Resisting fractre toughness.
In order to solve the above technical problems, a kind of aluminium alloy casting die steel production technology of the present invention, its processing step are：
A, 200mm Electro Slag Remelting Steel hot rollings are forged into required geomery forging stock；
B, forging stock low temperature enters the preheating of stove two-stage, and one-level preheats 450 DEG C ~ 500 DEG C, is incubated 1 ~ 2.0h；Two level preheating 850 DEG C ~ 900
DEG C insulation 3min/mm；
C, forging of coming out of the stove after 1160 DEG C ~ 1180 DEG C full and uniform heating and thermal insulations, initial forging temperature are to slowly warm up to after preheating insulation
1100 DEG C ~ 1130 DEG C light hammer is beaten soon, repeatedly upsetting pull extension, round as a ball and forging gengon；
When d, close to 960 DEG C ~ 1020 DEG C of final forging temperature, light hammer is beaten slowly, small forging ratio, lacks deflection；
E, after last fiery forging and molding, forging direction is changed；
F, multiply after forging stock is qualified in high waste heat return stove and be heated to 1100 ± 5 DEG C, oil quenching after insulation；
G, forging stock carries out 740 ± 5 DEG C, 2 ~ 3h high temperings, air cooling；
Preferably, 1055 ± 5 DEG C of the hardening heat.
Preferably, 640 ± 10 DEG C of the high tempering temperature, tempering time 2h.
Preferably, the Electro Slag Remelting Steel is H13 Electro Slag Remelting Steels.
Beneficial effects of the present invention：
In technique, forging smashes carbide and is uniformly distributed in steel matrix with worried strong moulding flowing, reaches center portion carbide
≤ 3 grades, carbonization pattern is fully improved, and becomes brittle carbides to strengthen carbide.
The forging stock low temperature of the present invention enters stove, preheats slowly heating, its homogeneous heating through two-stage, can effectively prevent " table occur
The heating defects such as black, male and female face among ripe inner life, inner ripe table life, two are white ", anti-forge crack.During close to final forging temperature, because temperature compared with
Low, material plasticity drastically reduces, and resistance of deformation is big, should gently hammer into shape beat slowly, small forging ratio, few deflection is anti-fracture.Last fire forging
After causing shape, change forging direction, make forging fibr tissue symmetrical around die cavity undulate.The acquisition of this technique productions
Fine and closely woven tempered sorbite tissue, 220 ~ 240HB of hardness, existing good cold machining processing characteristics, it is that preferable final quenching is pre- again
Tissue is handled, instead of spheroidizing after forging, simplifies process, when economize on electricity saves.Experiment shows, because steel microscopic structure and substructure are bright
It is aobvious to improve, spheroidizing can be avoided to increase substantially Die-casting Die Life because slow cooling separates out fragility chain-like carbide again.
Embodiment
With reference to embodiment, the present invention is further illustrated：
The invention discloses a kind of aluminium alloy casting die steel production technology, its processing step is：
A, 200mm Electro Slag Remelting Steel hot rollings are forged into required geomery forging stock；
B, forging stock low temperature enters the preheating of stove two-stage, and one-level preheats 450 DEG C ~ 500 DEG C, is incubated 1 ~ 2.0h；Two level preheating 850 DEG C ~ 900
DEG C insulation 3min/mm；
C, forging of coming out of the stove after 1160 DEG C ~ 1180 DEG C full and uniform heating and thermal insulations, initial forging temperature are to slowly warm up to after preheating insulation
1100 DEG C ~ 1130 DEG C light hammer is beaten soon, repeatedly upsetting pull extension, round as a ball and forging gengon；
When d, close to 960 DEG C ~ 1020 DEG C of final forging temperature, light hammer is beaten slowly, small forging ratio, lacks deflection；
E, after last fiery forging and molding, forging direction is changed；
F, multiply after forging stock is qualified in high waste heat return stove and be heated to 1100 ± 5 DEG C, oil quenching after insulation；
G, forging stock carries out 740 ± 5 DEG C, 2 ~ 3h high temperings, air cooling；
1055 ± 5 DEG C of the hardening heat.
640 ± 10 DEG C of the high tempering temperature, tempering time 2h.
The Electro Slag Remelting Steel is H13 Electro Slag Remelting Steels.
Embodiment one
A, 200mm H13 Electro Slag Remelting Steel hot rollings are forged into required geomery forging stock；
B, forging stock low temperature enters the preheating of stove two-stage, and one-level preheats 500 DEG C, is incubated 1.5h；Two level preheats 900 DEG C of insulation 3min/mm；
C, forging of coming out of the stove after 1150 DEG C of full and uniform heating and thermal insulations, the 1100 DEG C light hammer of initial forging temperature are to slowly warm up to after preheating insulation
Beat soon, repeatedly upsetting pull extension, round as a ball and forging gengon；
When d, close to 1000 DEG C of final forging temperature, light hammer is beaten slowly, small forging ratio, lacks deflection；
E, after last fiery forging and molding, forging direction is changed；
F, multiply after forging stock is qualified in high waste heat return stove and be heated to 1100 DEG C, oil quenching after insulation；
G, forging stock carries out 740 DEG C, 2h high temperings, air cooling.
Embodiment two
A, 200mm H13 Electro Slag Remelting Steel hot rollings are forged into required geomery forging stock；
B, forging stock low temperature enters the preheating of stove two-stage, and one-level preheats 450 DEG C, is incubated 2.0h；Two level preheats 900 DEG C of insulation 3min/mm；
C, forging of coming out of the stove after 1160 DEG C of full and uniform heating and thermal insulations, the 1130 DEG C light hammer of initial forging temperature are to slowly warm up to after preheating insulation
Beat soon, repeatedly upsetting pull extension, round as a ball and forging gengon；
When d, close to 1020 DEG C of final forging temperature, light hammer is beaten slowly, small forging ratio, lacks deflection；
E, after last fiery forging and molding, forging direction is changed；
F, multiply after forging stock is qualified in high waste heat return stove and be heated to 1105 DEG C, oil quenching after insulation；
G, forging stock carries out 745 DEG C, 3h high temperings, air cooling.
This technique processing forging alloy carbide top layer is consistent with center portion≤and 3 grades, become uneven carbide brittlement phase as carbon
Change phase, forging microscopic structure and substructure are obviously improved, and can avoid spheroidizing because slow cooling separates out fragility chain-like carbide, significantly
Degree improves Die-casting Die Life.
Claims (4)
1. a kind of aluminium alloy casting die steel production technology, its processing step are：
A, 200mm Electro Slag Remelting Steel hot rollings are forged into required geomery forging stock；
B, forging stock low temperature enters the preheating of stove two-stage, and one-level preheats 450 DEG C ~ 500 DEG C, is incubated 1 ~ 2.0h；Two level preheating 850 DEG C ~ 900
DEG C insulation 3min/mm；
C, forging of coming out of the stove after 1160 DEG C ~ 1180 DEG C full and uniform heating and thermal insulations, initial forging temperature are to slowly warm up to after preheating insulation
1100 DEG C ~ 1130 DEG C light hammer is beaten soon, repeatedly upsetting pull extension, round as a ball and forging gengon；
When d, close to 960 DEG C ~ 1020 DEG C of final forging temperature, light hammer is beaten slowly, small forging ratio, lacks deflection；
E, after last fiery forging and molding, forging direction is changed；
F, multiply after forging stock is qualified in high waste heat return stove and be heated to 1100 ± 5 DEG C, oil quenching after insulation；
G, forging stock carries out 740 ± 5 DEG C, 2 ~ 3h high temperings, air cooling.
2. aluminium alloy casting die steel production technology according to claim 1, it is characterised in that：The f steps hardening heat
1055±5℃。
3. aluminium alloy casting die steel production technology according to claim 1, it is characterised in that：The high tempering temperature
640 ± 10 DEG C, tempering time 2h.
4. aluminium alloy casting die steel production technology according to claim 1, it is characterised in that：The Electro Slag Remelting Steel is H13 electricity
Slag steel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710963017.0A CN107574295A (en) | 2017-10-17 | 2017-10-17 | Aluminium alloy casting die steel production technology |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710963017.0A CN107574295A (en) | 2017-10-17 | 2017-10-17 | Aluminium alloy casting die steel production technology |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101709428A (en) * | 2009-11-26 | 2010-05-19 | 上海大学 | Compound microalloy hot die steel with high heat resistance and preparation method thereof |
| CN102206739A (en) * | 2011-05-04 | 2011-10-05 | 上海大学 | Dual-refinement treatment process of hot mould steel structure |
| CN105525078A (en) * | 2015-11-15 | 2016-04-27 | 内蒙古北方重工业集团有限公司 | Preparation method for improving performance of 4Cr5MoSiV1 hot work die steel |
| CN106566997A (en) * | 2015-10-12 | 2017-04-19 | 宝钢特钢有限公司 | Hot work die steel for high-performance die-casting die and metallurgy manufacturing method thereof |
| CN106694768A (en) * | 2015-11-15 | 2017-05-24 | 内蒙古北方重工业集团有限公司 | Manufacturing method of H13 hollow core rod |
-
2017
- 2017-10-17 CN CN201710963017.0A patent/CN107574295A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101709428A (en) * | 2009-11-26 | 2010-05-19 | 上海大学 | Compound microalloy hot die steel with high heat resistance and preparation method thereof |
| CN102206739A (en) * | 2011-05-04 | 2011-10-05 | 上海大学 | Dual-refinement treatment process of hot mould steel structure |
| CN106566997A (en) * | 2015-10-12 | 2017-04-19 | 宝钢特钢有限公司 | Hot work die steel for high-performance die-casting die and metallurgy manufacturing method thereof |
| CN105525078A (en) * | 2015-11-15 | 2016-04-27 | 内蒙古北方重工业集团有限公司 | Preparation method for improving performance of 4Cr5MoSiV1 hot work die steel |
| CN106694768A (en) * | 2015-11-15 | 2017-05-24 | 内蒙古北方重工业集团有限公司 | Manufacturing method of H13 hollow core rod |
Non-Patent Citations (1)
| Title |
|---|
| 王荣滨: "铝合金连杆压铸模复合强化处理研究", 《五金科技》 * |
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Application publication date: 20180112 |