CN1112265C - Centrifugal electroslag casting process of producing forge steel for tools and dies - Google Patents
Centrifugal electroslag casting process of producing forge steel for tools and dies Download PDFInfo
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- CN1112265C CN1112265C CN 00121474 CN00121474A CN1112265C CN 1112265 C CN1112265 C CN 1112265C CN 00121474 CN00121474 CN 00121474 CN 00121474 A CN00121474 A CN 00121474A CN 1112265 C CN1112265 C CN 1112265C
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Abstract
The present invention relates to a method for producing forging steel materials of tools and moulds by using an electroslag centrifugal casting method. The present invention relates to a method for producing forging steel materials of tools and moulds by using electroslag centrifugal casting hollow blanks. The blanks can be cut into a shape suitable for forging processing by adopting machine cutting or other cutting methods according to the size and quality characteristics of the casting blanks, and can be made into blank materials which can be directly applied to manufacturing the steel materials of tools and moulds by appropriate forging and processing. The present invention has the advantages of compact technology, high material utilization ratio and low forging ratio, and the steel materials of tools and moulds with high quality can be manufactured by lower cost.
Description
Technical field:
The present invention relates to electroslag smelting casting and forging field, be particularly suitable for a kind of new technology of the forging production of mould steel.
Background technology:
At present, generally adopt forging method to produce mould steel, process route mainly contains two kinds of melting+die casting+forging and electroslag smelting casting+forging.The former is of poor quality for these two kinds of methods, latter's complex procedures, cost height, simultaneously both crops, back-end crop amount are bigger, in order to guarantee product quality, again big forging ratio must be set, for example the steel ingot of hot die steel H13 is forged and add man-hour, lumber recovery has only about 70%, and its forging ratio reaches 7～8.In August, 91, University of Science ﹠ Technology, Beijing applied for the patent of invention of " induction centrifugal electroslag casting abnormity hollow casting ", can produce high-quality hollow blank, but nobody expected can be used as the production mould steel always.
Summary of the invention:
The object of the invention is to utilize the measured outstanding feature of centrifugal electroslag casting abnormity hollow casting matter to produce the mould steel blank, aspect mechanical performance and serviceability all above forging with the trade mark, cut into the blank that varies in size as required, process to directly applying to the blank of tool and mould through qualified forging.
The present invention relates to a kind of production method of producing tool and mould forging material, processing step is induction centrifugal electroslag casting → hollow blank → cutting → forging, it is characterized in that: hollow blank steel grade is a mould steel, inside diameter ranges is 100～1000mm, within external diameter scope 120～2000mm, substance is between 50～2000kg, and according to the size and the quality characteristic of spray, cutting into 2～20, forging ratio is 1.8～5 variform blanks.For guaranteeing the mould steel product quality, the working position that is processed into the tool and mould blank can be forged in the outer surface or the position, upper and lower end face of blank during forging, when the working position of mould steel blank comprises the inner surface position of strand, then must forge with aximal deformation value, or first car goes the relatively poor part of hollow strand inner surface quality before cutting, and then cuts to forge and be processed into the blank that can directly apply to the worker mould.
The invention has the advantages that: when adopting the induction centrifugal electroslag casting method to produce spray, its material recovery rate height generally can reach more than 90%.Adopt centrifugal electroslag casting; owing in process of setting, be subjected to effective refining of action of centrifugal force, electroslag and the directional solidification under the flux shielding, the continuous casting billet structure densification of production, better performances; service life even surpass forging, be referred to as " liquid die forging " with the trade mark.Especially in the outer surface portions of induction centrifugal electroslag casting or centrifugal electroslag casting spare, because centrifugal force is big and cooling velocity is fast, performance has has met or exceeded the level of forging.Therefore, need only be with less deflection, when satisfying tool and mould working position performance requirement, the strand of well cutting can directly forge and be machined for the blank that tool and mould is made, and cost also reduces greatly.
Description of drawings:
Fig. 1 is a product deformation process sketch
The specific embodiment:
Embodiment 1 is the H13 round pie hot die blank that adopts this explained hereafter, appearance and size is diameter 320mm, high 140mm, heavy 88kg, its production technology is that 550mm, internal diameter are the hollow ring H13 cast blank of 350mm, heavy 560kg for the 200mm height for produce external diameter with induction centrifugal electroslag casting, method with machine cuts is cut into 6, is processed into the round pie blank of diameter 325mm, high 143mm, heavy 92kg through forging.With the hot die that the H13 blank of this explained hereafter is made, the blank that its service life, more traditional electroslag remelting forging Daye Special Steel Co., Ltd produced has improved about 30%.The hot die blank of making of the H13 blank of this explained hereafter, because technological process is short, once forges, need not the consutrode of purchasing, forging ratio only is 2, stock utilization is up to more than 90%, thereby production cost has reduced by 30%～40% than traditional electroslag remelting H13 forging.
Embodiment 2 is the 85Cr2MoV cold roll blanks that adopt this explained hereafter, appearance and size is diameter 350mm, long 460mm, heavy 345kg, its production technology is that 700mm, internal diameter are the hollow ring 85Cr2MoV cast blank of 460mm, heavy 1180kg for the 300mm height for produce external diameter with induction centrifugal electroslag casting, method with machine cuts is cut into 3, is processed into the round pie blank of diameter 370mm, long 465mm, heavy 35lkg through forging.With the cold roll that the 85Cr2MoV blank of this explained hereafter is made, the blank that its service life, more traditional electroslag remelting forging Daye Special Steel Co., Ltd produced has improved about 36%.The cold roll blank of making of the 85Cr2MoV blank of this explained hereafter, because technological process is short, once forge, need not the consutrode of purchasing, forging ratio only is 2, stock utilization is up to more than 90%, thereby production cost has reduced by 30%～40% than traditional electroslag remelting 85Cr2MoV forging.
Claims (2)
1, produces the production method of tool and mould forging material, processing step is induction centrifugal electroslag casting → hollow blank → cutting → forging, it is characterized in that: hollow blank steel grade is a mould steel, inside diameter ranges is 100～1000mm, within external diameter scope 120～2000mm, substance is between 50～2000kg, and according to the size and the quality characteristic of spray, cutting into 2～20, forging ratio is 1.8～5 variform blanks.
2, production method as claimed in claim 1, the working position that is processed into the tool and mould blank can be forged in the outer surface or the position, upper and lower end face of blank when it is characterized in that forging, when the working position of mould steel blank comprises the inner surface position of strand, then must forge with aximal deformation value, or first car goes the relatively poor part of hollow strand inner surface quality before cutting, and then cuts to forge and be processed into the blank that can directly apply to the worker mould.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00121474 CN1112265C (en) | 2000-07-25 | 2000-07-25 | Centrifugal electroslag casting process of producing forge steel for tools and dies |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00121474 CN1112265C (en) | 2000-07-25 | 2000-07-25 | Centrifugal electroslag casting process of producing forge steel for tools and dies |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1335212A CN1335212A (en) | 2002-02-13 |
| CN1112265C true CN1112265C (en) | 2003-06-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00121474 Expired - Fee Related CN1112265C (en) | 2000-07-25 | 2000-07-25 | Centrifugal electroslag casting process of producing forge steel for tools and dies |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1112265C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105436368B (en) * | 2014-09-01 | 2017-04-19 | 中国科学院金属研究所 | Superhigh-temperature crossed large-deformation forging method for improving structure uniformity of tool and mold steel |
| CN113649540B (en) * | 2021-08-13 | 2022-04-15 | 北京科技大学 | Method for refining H13 hollow casting liquated carbide |
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2000
- 2000-07-25 CN CN 00121474 patent/CN1112265C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1335212A (en) | 2002-02-13 |
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| CF01 | Termination of patent right due to non-payment of annual fee |