CN102397994A - Mold - Google Patents
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- CN102397994A CN102397994A CN2010102785709A CN201010278570A CN102397994A CN 102397994 A CN102397994 A CN 102397994A CN 2010102785709 A CN2010102785709 A CN 2010102785709A CN 201010278570 A CN201010278570 A CN 201010278570A CN 102397994 A CN102397994 A CN 102397994A
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- mould
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- wear resistant
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Abstract
The invention discloses a mold. The mold has excellent comprehensive properties. The mold is characterized in that high-strength and toughness coldwork mold steel SDC99 is utilized as a base material and a Cr-based wear-resistant anti-frictional coating CrTiAlN is coated on the surface of the base material, wherein the high-strength and toughness coldwork mold steel SDC99 comprise: by mass, 0.92% of C, 1.01% of Si, 0.27% of Mn, 9.50% of Cr, 1.94% of Mo, 0.88% of V, 0.12% of Ni and the balance of Fe; and the Cr-based wear-resistant anti-frictional coating CrTiAlN comprises: by mass, 74 to 76% of Cr, 8 to 10% of Ti, 5 to 7% of Al, 8 to 10% of N and 1% of Fe.
Description
Technical field
The present invention relates to a kind of mould, especially a kind of mould with control arm of making automobile chassis.
Background technology
With regard to auto parts and components manufacturing enterprise, control arm is one of parts main in the chassis part, and flange and finishing mold duty are extremely harsh; Instant impact is big, and concavo-convex intermode size fitness is high, and is lubricated poor with heat-conductive characteristic; Cause mould because of serious adhesive wear premature failure; Had a strong impact on the stability of production and the quality of product die life and low thus, is " bottleneck " problem in the production process.
The mould great majority adopt typical cold work die steel (Cr12MoV), though good wearability is arranged, are difficult to satisfy the performance of under extremely abominable working condition, using.The for example made control arm flange class drift life-span promptly need repair a die through hundreds of time flange, and thousands of flange are about to scrap, and the output of every day is more than equal thousand.The number of times that repairs a die that slightly can alleviate mould is handled in the die surface nitriding, but often reduces mold integral hardness and intensity because of nitriding temperature is difficult to control (instantaneous temperature surpasses the temperature of mould), thereby causes mould to be scrapped.
In recent ten years, tool surfaces such as cutter, rotary head are developed and be applied to the surface physics gas phase deposition technology gradually, and for example Cr base coating is that the coating that present people pay close attention to the most is used for instruments such as rotary head.Nano coating from single hard conating, gradient coating, multi-component coating to 21 century makes rapid progress, and emerges in an endless stream.But also there is not coating to be applied to the report on cold-work die surface.The factor that influences the coating fretting wear has a lot, like adhesion of preparation method, chemical constituent, micro-structural, coating layer thickness, matrix material characteristic coating and the matrix of coating etc.Different with instruments such as cutters; Except considering coating hardness, intensity and wearability; The adhesion of coating and matrix, and the tribological property of coating (friction, lubricated with wearing and tearing) becomes the performance indications of key, the mould of especially under bad working environments condition extremely, being on active service.
Summary of the invention
Based on this, the objective of the invention is to optimize the combination of cold mold material and face coat, to obtain the excellent mould of combination property (toughness, intensity, wearability etc.).
A kind of mould is characterized in, is matrix material with high-strength toughness cold working die steel SDC99, and at surface deposition Cr base wear resistant friction reducing coating CrTiAlN; Wherein, the chemical composition of high-strength toughness cold working die steel SDC99 (mass percent) is 0.92%C, 1.01%Si; 0.27%Mn, 9.50%Cr, 1.94%Mo; 0.88%V, 0.12%Ni and Fe surplus, the chemical composition (mass percent) of wear resistant friction reducing coating CrTiAlN is Cr:74-76%; Ti:8-10%, Al:5-7%, N:8-10% and micro Fe 1%.
Described mould; Its further characteristics are that the non-balance magnetically controlled sputter technology that employing sputtering target material surface plasma volume density is high, coating is even and adhesion is strong deposits the Cr base wear resistant friction reducing coating CrTiAlN of high strength, low-friction coefficient at substrate material surface.
Described mould, its further characteristics are that the temperature of deposition CrTiAlN approaches the temperature of matrix material.
Described mould, its further characteristics are that matrix material adopts 1050 ℃ of vacuum oil quenchings and 520 ℃ of high tempering heat to carry out bulk heat treatmet.
Described mould, its further characteristics are to be automobile control arm mould.
In the past, control arm flange die finish was with the speed cold punching control arm part of per minute 12 times, because cold punching load high (630 tons); And die and punch gap are extremely little, and die surface bears very big friction stree during cold punching, behind about hundreds of time cold punching flange; The straight wall surface of mould flange has produced serious adhesive wear and cold-worked part bore area plucking, absorption and too early mould takes place had lost efficacy, this shows, the low adhesive wear performance of die surface largely limit the cold-punching mould use; Or shortened actual life of mould, and aforementioned mould adopts the cold mold material optimized and effective combination of face coat, and it is low to have overcome cold mold material mantle friction performance; And weak points such as hard conating poor toughness have realized high-level mould practicability, have improved the service life of mould significantly; Reduced the manufacturing cost of mould, along with riseing of Chinese automobile output, control arm class related die will have huge use amount; But in the service life that utilization the present invention order of magnitude improves mould,, improve the quality of products to falling this; Improve product stability, many-sides such as environmental protection and energy saving have profound significance, and market prospects are wide.
The specific embodiment
It is matrix material that the matrix material of mould adopts high-strength toughness cold working die steel SDC99, and its chemical composition (mass percent) is 0.92%C, 1.01%Si, 0.27%Mn, 9.50%Cr, 1.94%Mo, 0.88%V and 0.12%Ni.More traditional Cr12MoV compares, reduced the content of carbon, chromium, has improved the content of molybdenum, vanadium, reduces and the refining eutectic carbide, and crystal grain thinning improved toughness.Through quench hot and temper, case hardness is HRC61-62 (a little less than a tool steel).
But not surface treated SDC99 steel, its case hardness and intensity are difficult to satisfy the wearability of die surface, the friction pair that while workpiece and mould are formed, its adhesion tendency is big.Usually, the control arm flange die finish of automobile chassis is behind about hundreds of time cold punching flange, and the straight wall surface of mould flange has produced serious adhesive wear and cold-worked part bore area plucking, absorption and too early mould inefficacy takes place.
For the mould of one type of control arm flange die finish, cold punching speed fast (12 times/minute), cold punching load high (630 tons), and also die and punch gap are extremely little, and die surface bears very big friction stree and heat during cold punching.
The inventor is according to the friction pair principle between coating and mould; Attempted adopting the non-balance magnetically controlled sputter technology that sputtering target material surface plasma volume density is high, coating is even and adhesion is strong, in the Cr base wear resistant friction reducing coating (CrTiAlN) of substrate material surface deposition high strength, low-friction coefficient.But wear resistant friction reducing coating (CrTiAlN) effect is able to give full play to, and depends on the adhesion of coating and matrix material to a great extent, and this and die matrix material mechanical performance mate closely bound up.For the mould of one type of control arm flange die finish, in the process, matrix material can not support coating under arms, quickens the inefficacy of mould on the contrary.Therefore the inventor is a matrix material with high-strength toughness cold working die steel SDC99, and the wear resistant friction reducing coating (CrTiAlN) of combination and surface deposition is developed the mould of control arm flange die finish.Matrix material at first adopts 1050 ℃ of vacuum oil quenchings and 520 ℃ of high tempering heat treatments to carrying out bulk heat treatmet; Hardness after the processing is HRC61-62, adopts the non-balance magnetically controlled sputter technology that sputtering target material surface plasma volume density is high, coating is even and adhesion is strong then, in the Cr base wear resistant friction reducing coating (CrTiAlN) of substrate material surface deposition high strength, low-friction coefficient; And regulate N atmosphere automatically through OEM; And the chemical composition of target bias current adjusting CrTiAlN, adjusted suitable component (mass percent) is Cr:74-76%, Ti:8-10%; Al:5-7%, N:8-10% and micro Fe 1%).Depositing temperature approaches the temperature of matrix material.Case hardness is up to 2600Hv, and coefficient of friction is 0.10～0.12.
Because SDC99 is that matrix material has high obdurability, its surface deposition wears away the coating CrTiAlN that rubs.Therefore mould is at top load; Under the working condition that impacts fast, when coating and matrix receive external force to do the time spent, matrix material can effectively absorb ballistic work; And high hardness (HRC61-62) increases the ability of elastoresistance distortion and plastic deformation effectively; Shortened the difference of the elastic modelling quantity and the mould base material elastic modelling quantity of coating, reduced coating inner tensile stress, increased coating under arms in the process bearing capacity and with the adhesion of matrix.The ability of the anti-adhesive wear of performance ground coating has effectively greatly prolonged mould actual life.
In inventor's test; After having adopted aforesaid high-strength toughness cold working die steel surface deposition and wearing away the coating of rubbing (CrTiAlN) coating; Control arm flange die finish; In 630 tons of cold press actual application of passenger-car chassis factory, mould shows excellent abrasion resistance, anti-adherence, and the raising of the order of magnitude (50 times) has been arranged die life.
Claims (5)
1. a mould is characterized in that, is matrix material with high-strength toughness cold working die steel SDC99, and at surface deposition Cr base wear resistant friction reducing coating CrTiAlN; Wherein, the chemical composition of high-strength toughness cold working die steel SDC99 (mass percent) is 0.92%C, 1.01%Si; 0.27%Mn, 9.50%Cr, 1.94%Mo; 0.88%V, 0.12%Ni and Fe surplus, the chemical composition (mass percent) of wear resistant friction reducing coating CrTiAlN is Cr:74-76%; Ti:8-10%, Al:5-7%, N:8-10% and micro Fe 1%.
2. mould as claimed in claim 1; It is characterized in that the non-balance magnetically controlled sputter technology that employing sputtering target material surface plasma volume density is high, coating is even and adhesion is strong deposits the Cr base wear resistant friction reducing coating CrTiAlN of high strength, low-friction coefficient at substrate material surface.
3. mould as claimed in claim 1 is characterized in that, the temperature of deposition CrTiAlN approaches the temperature of matrix material.
4. mould as claimed in claim 1 is characterized in that, matrix material adopts 1050 ℃ of vacuum oil quenchings and 520 ℃ of high tempering heat to carry out bulk heat treatmet.
5. mould as claimed in claim 1 is characterized in that, is automobile control arm mould.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102785709A CN102397994A (en) | 2010-09-10 | 2010-09-10 | Mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102785709A CN102397994A (en) | 2010-09-10 | 2010-09-10 | Mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102397994A true CN102397994A (en) | 2012-04-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102785709A Pending CN102397994A (en) | 2010-09-10 | 2010-09-10 | Mold |
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| CN (1) | CN102397994A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104550432A (en) * | 2014-12-24 | 2015-04-29 | 蚌埠银丰滤清器科技有限公司 | Filter thread cover plate progressive die hole flanging small punch and application method thereof |
| CN106676431A (en) * | 2015-11-06 | 2017-05-17 | 通用汽车环球科技运作有限责任公司 | Alloy composition for thermal spray application |
| CN107442720A (en) * | 2017-06-13 | 2017-12-08 | 江苏森威精锻有限公司 | A kind of material fabrication process of cold-working mould |
| CN108085595A (en) * | 2017-12-21 | 2018-05-29 | 湖南中捷精密智造有限公司 | A kind of mold and preparation method thereof |
| WO2019223138A1 (en) * | 2018-05-21 | 2019-11-28 | 广东核电合营有限公司 | Multi-element alloy coating, zirconium alloy cladding, and fuel assembly |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87107114A (en) * | 1987-10-22 | 1988-05-18 | 华中工学院 | High strength and tenacity, low-alloy cold-forming die steel |
| CN100999802A (en) * | 2007-01-05 | 2007-07-18 | 河冶科技股份有限公司 | High malleable high wear-resisting cold process mould steel |
| CN101182619A (en) * | 2007-12-06 | 2008-05-21 | 上海大学 | High-strength toughness cold working die steel and method of producing the same |
| CN101717896A (en) * | 2009-12-22 | 2010-06-02 | 上海大学 | High strength and toughness cold working die steel and preparation method thereof |
| CN101717844A (en) * | 2009-12-29 | 2010-06-02 | 江苏工业学院 | Method for surface hardening of cold-work mould steel |
-
2010
- 2010-09-10 CN CN2010102785709A patent/CN102397994A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87107114A (en) * | 1987-10-22 | 1988-05-18 | 华中工学院 | High strength and tenacity, low-alloy cold-forming die steel |
| CN100999802A (en) * | 2007-01-05 | 2007-07-18 | 河冶科技股份有限公司 | High malleable high wear-resisting cold process mould steel |
| CN101182619A (en) * | 2007-12-06 | 2008-05-21 | 上海大学 | High-strength toughness cold working die steel and method of producing the same |
| CN101717896A (en) * | 2009-12-22 | 2010-06-02 | 上海大学 | High strength and toughness cold working die steel and preparation method thereof |
| CN101717844A (en) * | 2009-12-29 | 2010-06-02 | 江苏工业学院 | Method for surface hardening of cold-work mould steel |
Non-Patent Citations (2)
| Title |
|---|
| 徐颖婕等: "磁控溅射CrTiAlN涂层的性能研究", 《第六届全国表面工程学术会议论文集》, 31 December 2006 (2006-12-31) * |
| 李潇等: "非平衡磁控溅射CrTiAlN涂层的耐腐蚀性能", 《中国表面工程》, 31 December 2010 (2010-12-31) * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104550432A (en) * | 2014-12-24 | 2015-04-29 | 蚌埠银丰滤清器科技有限公司 | Filter thread cover plate progressive die hole flanging small punch and application method thereof |
| CN106676431A (en) * | 2015-11-06 | 2017-05-17 | 通用汽车环球科技运作有限责任公司 | Alloy composition for thermal spray application |
| CN107442720A (en) * | 2017-06-13 | 2017-12-08 | 江苏森威精锻有限公司 | A kind of material fabrication process of cold-working mould |
| CN108085595A (en) * | 2017-12-21 | 2018-05-29 | 湖南中捷精密智造有限公司 | A kind of mold and preparation method thereof |
| WO2019223138A1 (en) * | 2018-05-21 | 2019-11-28 | 广东核电合营有限公司 | Multi-element alloy coating, zirconium alloy cladding, and fuel assembly |
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Application publication date: 20120404 |