CN103320709A - Cold-work die steel material and alloy alterant - Google Patents
Cold-work die steel material and alloy alterant Download PDFInfo
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- CN103320709A CN103320709A CN2013102054726A CN201310205472A CN103320709A CN 103320709 A CN103320709 A CN 103320709A CN 2013102054726 A CN2013102054726 A CN 2013102054726A CN 201310205472 A CN201310205472 A CN 201310205472A CN 103320709 A CN103320709 A CN 103320709A
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Abstract
The invention relates to a cold-work die steel material and an alloy alterant. The cold-work die steel material is characterized in that: besides Fe, the material further comprises the following elements by weight: 1.55-1.75% of C, 11.50-12.50% of Cr, 0.20-0.30% of V, 0.45-0.55% of Mo, not more than 0.25% of Si, not more than 0.20% of Mn, not more than 0.030% of S, not more than 0.030% of P, not more than 0.15% of Ni, not more than 0.2% of Cu, and the balance Fe, wherein sum of weight percentage of each element is 100%. Compared with the prior art, the cold-work die steel material is used for casting, and the alloy alterant is added for raising performances of the cold-work die steel material. A cold-work die module is made by a casting technology, which saves energy, reduces waste of materials, and greatly shortens a production cycle.
Description
Technical field
The present invention relates to cold-work die steel, more particularly, relate to a kind of cold working die steel material and alloy inoculant.
Background technology
Existing cold-work die steel can't be applied to casting, there is defective in the performance of perhaps casting the foundry goods that obtains, therefore raw-material the changing of traditional cold-work die forged the break-in forging methods that adopt more, main forging process is: jumping-up-pulling-jumping-up, and the shortcoming of its existence is: the forging process process is complicated, and cost is high, the efficient of processing is low, and to forge module be simple square or right cylinder, differs larger with the true form of cold working die module, need to carry out machining again.In the machining process after forging, amount of machining is large, can cause the waste of lot of materials and the energy.
Summary of the invention
The technical problem to be solved in the present invention is, a kind of cold working die steel material and alloy inoculant applicable to casting is provided.
The technical solution adopted for the present invention to solve the technical problems is: a kind of cold working die steel material is provided, also comprises following element except Fe, by weight percentage: C 1.55～1.75%, Cr 11.50～12.50%, and V 0.20～0.30%, and Mo 0.45～0.55%, Si is not more than 0.25%, Mn is not more than 0.20%, S and is not more than 0.030%, P and is not more than 0.030%, Ni is not more than 0.15%, it is surplus that Cu is not more than 0.2%, Fe, and each element wt per-cent sum is 100%.
In cold working die steel material of the present invention, except Fe, also comprise following element in the material, by weight percentage: C 1.72%, Cr 12.03%, and V 0.25%, and Mo 0.50%, Si is not more than 0.25%, Mn is not more than 0.20%, S and is not more than 0.030%, P and is not more than 0.030%, Ni is not more than 0.15%, it is surplus that Cu is not more than 0.2%, Fe, and each element wt per-cent sum is 100%.
The present invention also provides a kind of alloy inoculant that is applicable to above-mentioned cold working die steel material, except Fe, also comprise following element in the alterant, by weight percentage: RE 14.0～20.5%, Mg 3.0～4.5%, and Si 25～30%, and Mn 3.0～4.0%, Ca 3.0～5.0%, Ti 1.5～2.5%, and Fe is surplus, and each element wt per-cent sum is 100%.
In alloy inoculant of the present invention, except Fe, also comprise following element in the alterant, by weight percentage: RE 18.2%, and Mg 4.1%, and Si 26.5%, and Mn 3.0%, and Ca 3.5%, and Ti 2.1%, and Fe is surplus, each element wt per-cent sum is 100%.
Implement cold working die module castmethod of the present invention, have following beneficial effect:
1, cold working die steel material of the present invention still has good performance after casting, has higher hardness and impelling strength, can satisfy the user demand of cold working die module.Make cold working die module by casting technique, the amount of machining of mould greatly reduces, when guaranteeing the cold-work die performance, and the waste of save energy and minimizing material, the production cycle also shortens greatly.
2, alloy inoculant of the present invention can join in the cold working die steel material, alloy inoculant is little on the linear shrinkage ratio impact, alterant can make foundry goods obtain reasonable metallographic structure, crystal grain thinning and raising hardness value and impelling strength, improve flowability and the solidifiability of molten steel, improve the component segregation of foundry goods and the cavity filling energy of molten steel, make the interior alloying elements distribution of foundry goods more even, reduce the surfaceness of foundry goods.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the structural representation of cold working die module;
Fig. 2 is the structural representation of rising head;
Fig. 3 is the front view of rising head;
Fig. 4 is the vertical view of rising head.
Embodiment
Understand for technical characterictic of the present invention, purpose and effect being had more clearly, now contrast accompanying drawing and describe the specific embodiment of the present invention in detail.
Except Fe, also comprise following element in the cold working die steel material of the present invention, by weight percentage: C1.55～1.75%, Cr 11.50～12.50%, V 0.20～0.30%, Mo 0.45～0.55%, and Si is not more than 0.25%, Mn and is not more than 0.20%, S is not more than 0.030%, P is not more than 0.030%, Ni and is not more than 0.15%, Cu and is not more than 0.2%, Fe is surplus, and each element wt per-cent sum is 100%.In a preferred embodiment of the invention, C 1.72%, and Cr 12.03%, V 0.25%, Mo 0.50%, and Si is not more than 0.25%, Mn and is not more than 0.20%, S is not more than 0.030%, P is not more than 0.030%, Ni and is not more than 0.15%, Cu and is not more than 0.2%, Fe is surplus, and each element wt per-cent sum is 100%.
The present invention also provides a kind of alloy inoculant for adding aforesaid cold working die steel material to, is used for improving the performance of material.Also comprise following element in the alloy inoculant except Fe, by weight percentage: RE 14.0～20.5%, and Mg 3.0～4.5%, Si 25～30%, and Mn 3.0～4.0%, and Ca 3.0～5.0%, Ti 1.5～2.5%, and Fe is surplus, and each element wt per-cent sum is 100%.The quality of the alterant that adds be cold working die steel material quality 0.15～0.45%.In a preferred embodiment of the invention, RE 18.2%, and Mg 4.1%, and Si 26.5%, and Mn 3.0%, and Ca 3.5%, and Ti 2.1%,, Fe is surplus, each element wt per-cent sum is 100%.The quality of the alterant that adds be cold working die steel material quality 0.4%.
Cold working die steel material of the present invention may further comprise the steps when being applied to the cold working die module casting:
S1, melting cold-work die steel molten steel; Select medium frequency induction melting furnace fusing molten steel, with magnesia as furnace lining material, a cylinder module is placed by central authorities at burner hearth, power with ruhmkorff coil after furnace lining is accomplished fluently is added to first 10KW, the baking furnace lining, insulation 6h is until the magnesia around the middle cylindrical module is fully sintered, till being black and becoming fragile (this process is the roaster lining material).Cylindrical module in the middle of taking out is put into the above-mentioned cold working die steel material that is ready to treat melting; To 30KW, keep test block in a hour to melt fully the heater coil power selection, obtain molten steel.
S2 adds above-mentioned alloy inoculant (rare earth alloy alterant) in the molten steel, obtains adding the molten steel of alterant, the quality of the alterant of adding be molten steel quality 0.15～0.45%.
Measure the temperature of molten steel with infrared thermometer, when reaching 1550 ℃, insert aluminium tapping (add during tapping the effect of rare earth and slotting aluminium: final deoxygenation and the purpose that breeds), adopt processings (employing wire feeding process adding alterant) of go bad of wire feeding process rare earth alloy.The inner core of the silk that adopts in the wire feeding process is the rare earth alloy alterant, and the outside of inner core coats Low Carbon Steel Pipe and aluminum pipe successively.The wall thickness of Low Carbon Steel Pipe is 0.2～2.5mm, and tapping temperature is higher or amount is larger, and tube wall is thicker; The wall thickness of aluminum pipe is 0.5～3.0mm, and wall thickness weighs 0.3～0.6Kg according to molten steel aluminum pipe per ton and makes.The techniques such as deoxidation, purification of molten steel, impurity modification, microalloy treatment can be finished by one step of wire feeding process.
S3; size according to cold working die module is made the evaporative pattern foam block; be evenly coated in the foam type surface after zircon flour coating is water-soluble; in baking oven, be heated to the moisture content in 60 ℃ of insulations oven dry in 1 hour coating; be coated with coating oven dry, three times until foam surface is tied the zirconium English powder protective layer of one deck densification fully repeatedly again.
Then will there be the foam block of zirconium English powder protective layer to imbed sandbox.The shape of cold working die module (selects one of inserting of assembled piece type sheet-metal press working mould in certain automobile production to be example) as shown in Figure 1.
Cast module (foam block that zirconium English powder protective layer is arranged) is placed vertically downward according to the foundry goods working face; dead head is arranged on the top of cast module; as far as possible near the triangle stiffening web position of pouring into a mould module; through relatively comprehensive, the difference of dead head position is to the certain influence that is distributed with of defective in the cast module.Dead head is arranged on the distribution of fixed face root formation shrinkage porosite shrinkage cavity and area is minimum, minimum number, therefore the optimum position of rising head is the fixed face root.Increase the size of dead head, do not have help to reducing final set liquidus line district in the foundry goods; Dead head undersized can make foundry goods produce too much shrinkage cavity, and be little on the impact of foundry goods internal porosity; The height that increases dead head can only increase the interior shrinkage cavity of dead head.Dead head size L * B * H is 110 * 85 * 80mm in the present embodiment, such as Fig. 2-shown in Figure 4.
S4, cast adds the molten steel of alterant; The liquidus temperature of cold-work die steel of the present invention is 1482 ℃, if teeming temperature is lower than material liquid phase temperature of solidification, can affect the mold filling and solidification processes of foundry goods, and choosing teeming temperature is 1500 ℃ of situations of observing shrinkage cavity and porosity.Through relatively comprehensive, along with the rising of teeming temperature, the volume change of the filling time of foundry goods and foundry goods internal porosity is little, and the shrinkage cavity change is many, the setting time of foundry goods also prolongs, and continues to improve the waste that teeming temperature can cause the energy, and therefore best casting pouring temperature is 1500 ℃.
S5 takes out the cold working die module foundry goods, and heat-treats.Foundry goods is SG2-5-12 in model, rated output 5KW, temperature rating is to carry out isothermal annealed processes in 1200 ℃ the well formula heat treatment furnace: being heated to 870 ℃ in well formula heat treatment furnace, is the temperature controller thermocouple measuring temperature of KSW-6D-16 by model, insulation 3h; Slow cooling to 740 ℃, insulation 3h; Come out of the stove behind the furnace cooling to 500 ℃, speed of cooling is less than 30 ℃/h.Carry out middle temperature quenching technology: be heated to 840 ℃, insulation 30min continues to be warmed up to 1040 ℃, and insulation 20min takes out oil quenching again.Carry out at last low-temperaturetempering technique: be heated to 200 ℃ in well formula heat treatment furnace, air cooling behind the insulation 2h obtains cold working die module.
The hardness of the cold working die module that makes by above-mentioned steps is 62HRC, and ultimate compression strength is 5100Mpa, and bending strength is 4000Mpa, can satisfy the user demand of cold-work die.
In another preferred embodiment of the present invention, except Fe, also comprise following element in the cold working die steel material, by weight percentage: C 1.72%, Cr 12.03%, and V 0.25%, and Mo 0.50%, Si 0.15%, Mn 0.10%, and S 0.020%, and P 0.015%, Ni 0.05%, Cu 0.1%, and Fe is surplus, and each element wt per-cent sum is 100%.
Also comprise following element in the alloy inoculant except Fe, by weight percentage: RE 18.2%, Mg4.1%, and Si 26.5%, and Mn 3.0%, and Ca 3.5%, and Ti 2.1%,, Fe is surplus, each element wt per-cent sum is 100%.The quality of the alterant that adds be cold working die steel material quality 0.4%.
Step when the cold working die steel material of the present embodiment is applied to the cold working die module casting is identical with the step in above-described embodiment, does not repeat them here.
The hardness of the cold working die module that makes by the present embodiment cold working die steel material and alloy inoculant is 63HRC, and ultimate compression strength is 5120Mpa, and bending strength is 4010Mpa, can satisfy the user demand of cold-work die.
The above is described embodiments of the invention by reference to the accompanying drawings; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment only is schematic; rather than restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not breaking away from the scope situation that aim of the present invention and claim protect, also can make a lot of forms, these all belong within the protection of the present invention.
Claims (4)
1. a cold working die steel material is characterized in that, also comprises following element in the material except Fe, by weight percentage: C 1.55～1.75%, and Cr 11.50～12.50%, and V 0.20～0.30%, Mo 0.45～0.55%, and Si is not more than 0.25%, Mn and is not more than 0.20%, S is not more than 0.030%, P is not more than 0.030%, Ni and is not more than 0.15%, Cu and is not more than 0.2%, Fe is surplus, and each element wt per-cent sum is 100%.
2. cold working die steel material according to claim 1 is characterized in that, also comprises following element in the material except Fe, by weight percentage: C 1.72%, and Cr 12.03%, and V 0.25%, Mo 0.50%, and Si is not more than 0.25%, Mn and is not more than 0.20%, S is not more than 0.030%, P is not more than 0.030%, Ni and is not more than 0.15%, Cu and is not more than 0.2%, Fe is surplus, and each element wt per-cent sum is 100%.
3. alloy inoculant that is applicable to claim 1 or 2 described cold working die steel materials, it is characterized in that, also comprise following element in the alterant except Fe, by weight percentage: RE 14.0～20.5%, and Mg 3.0～4.5%, Si 25～30%, Mn 3.0～4.0%, and Ca 3.0～5.0%, and Ti 1.5～2.5%, Fe is surplus, and each element wt per-cent sum is 100%.
4. alloy inoculant according to claim 3 is characterized in that, also comprises following element in the alterant except Fe, and by weight percentage: RE 18.2%, Mg 4.1%, and Si 26.5%, and Mn 3.0%, and Ca 3.5%, Ti 2.1%, and Fe is surplus, and each element wt per-cent sum is 100%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310205472.6A CN103320709B (en) | 2013-03-13 | 2013-05-28 | Cold working die steel material and alloy inoculant |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201310079850 CN103147008A (en) | 2013-03-13 | 2013-03-13 | Cold-work mould steel material and alloy modifying agent |
| CN201310079850.0 | 2013-03-13 | ||
| CN201310205472.6A CN103320709B (en) | 2013-03-13 | 2013-05-28 | Cold working die steel material and alloy inoculant |
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| CN103320709A true CN103320709A (en) | 2013-09-25 |
| CN103320709B CN103320709B (en) | 2015-12-09 |
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| CN201310205472.6A Active - Reinstated CN103320709B (en) | 2013-03-13 | 2013-05-28 | Cold working die steel material and alloy inoculant |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103924164A (en) * | 2014-04-10 | 2014-07-16 | 铜陵南江鑫钢实业有限公司 | High chrome alloy steel material and preparation method thereof |
| CN107937827A (en) * | 2017-11-24 | 2018-04-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Improve the production method of steel polishing performance |
| CN109957718A (en) * | 2017-12-26 | 2019-07-02 | 武汉理工大学 | A kind of casting cold work die steel and preparation method thereof |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105648359B (en) * | 2016-04-14 | 2018-01-12 | 山东鸿民轧辊模具有限公司 | A kind of wear-resisting cold work die steel and application and preparation method |
| CN106011691B (en) * | 2016-07-27 | 2018-07-03 | 东莞市闻誉实业有限公司 | Alloy product |
| CN114058959A (en) * | 2021-11-12 | 2022-02-18 | 成都先进金属材料产业技术研究院股份有限公司 | High-carbon die steel and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09125204A (en) * | 1995-10-31 | 1997-05-13 | Aichi Steel Works Ltd | Cold tool steel minimal in dimensional change after heat treatment and its production |
| CN1718816A (en) * | 2005-07-29 | 2006-01-11 | 龙南县龙钇重稀土材料有限责任公司 | Yttrium base rare earth silicon calcium iron alloy, its preparation method and use |
| CN1807657A (en) * | 2006-02-09 | 2006-07-26 | 谢廷声 | Steel-smelting alterant for molten steel refining |
| CN101314180A (en) * | 2008-05-12 | 2008-12-03 | 中钢集团邢台机械轧辊有限公司 | Cold-forming die steel collars anticentripetal composite casting technique for rail beam and section |
-
2013
- 2013-03-13 CN CN 201310079850 patent/CN103147008A/en not_active Withdrawn
- 2013-05-28 CN CN201310205472.6A patent/CN103320709B/en active Active - Reinstated
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09125204A (en) * | 1995-10-31 | 1997-05-13 | Aichi Steel Works Ltd | Cold tool steel minimal in dimensional change after heat treatment and its production |
| CN1718816A (en) * | 2005-07-29 | 2006-01-11 | 龙南县龙钇重稀土材料有限责任公司 | Yttrium base rare earth silicon calcium iron alloy, its preparation method and use |
| CN1807657A (en) * | 2006-02-09 | 2006-07-26 | 谢廷声 | Steel-smelting alterant for molten steel refining |
| CN101314180A (en) * | 2008-05-12 | 2008-12-03 | 中钢集团邢台机械轧辊有限公司 | Cold-forming die steel collars anticentripetal composite casting technique for rail beam and section |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103924164A (en) * | 2014-04-10 | 2014-07-16 | 铜陵南江鑫钢实业有限公司 | High chrome alloy steel material and preparation method thereof |
| CN107937827A (en) * | 2017-11-24 | 2018-04-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Improve the production method of steel polishing performance |
| CN109957718A (en) * | 2017-12-26 | 2019-07-02 | 武汉理工大学 | A kind of casting cold work die steel and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN103320709B (en) | 2015-12-09 |
| CN103147008A (en) | 2013-06-12 |
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