BALINIT® coating technology covers the application of a mould industry in the car

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The high speed that accompanying trade of Chinese car mould develops, metallic finishing technology especially PVD coating technology enclothed a mould industry to receive wider and wider application in the car. Be aimed at the panel outside the car, inside panel, the structural member and hot strike out different application demand that waits for a mould, baerchasi regards Ou Ruikang as the leader of technology of global PVD coating and market, developed technologies of a series of newest PVD coating to cover the need of a mould market in order to get used to a car. The high speed that accompanying trade of Chinese car mould develops, metallic finishing technology especially PVD coating technology enclothed a mould industry to receive wider and wider application in the car. Be aimed at the panel outside the car, inside panel, the structural member and hot strike out different application demand that waits for a mould, baerchasi regards Ou Ruikang as the leader of technology of global PVD coating and market, developed technologies of a series of newest PVD coating to cover the need of a mould market in order to get used to a car. As car automobile body light quantified development trend, the car is enclothed especially inside panel and structural member use high strenth armor plate increasingly to be like steel of high strenth IF, isotropy steel (IS) , roast and sclerotic steel (BH) , low alloy high strenth steel (HSLA) , more of high strenth advanced / armor plate of extra high strength is like Shuang Xianggang (DP) , answer photograph steel (CP) , become revulsive plasticity steel (TRIP) , martensite steel and steel of hot punch sclerosis. No matter be to pull,delaying still is flange craft, because rise significantly and drop of outspread rate of plank tensile strength significantly, to the compressive strength of mould itself, wearability, fight occlusive sex to reach fought the function such as adhesion sex to raise taller requirement, without the tradition of any finishing the mould cannot satisfy this kind of requirement already completely. Shell plating -- whole is cast-iron at present the car enclothes kind of mould a shell plating because workpiece figure is average relatively simple and use common board only mostly at present, the tensile strength of rolled steel is not high and it is better to extend a gender, the integral demand to the mould is consequently relative for not quite tall, the mould uses integral structure mostly, mould material uses nodular cast iron to wait commonly cast-iron kind of material. Because size of its whole mould is larger, exceeded the ultimate size that PVD or TD equipment can handle normally, its finishing uses craft of plating hard chromium or nitrogen to change technology mostly at present. The film ply of good chromic technology is in plating normally 30 μ of 20 ～ M, vickers small hardness uprights commonly between HV900-1100. Because film is accumulation is over base material,its defect is, if laden pressure is too great,suffer the effect of use environment easily, of horniness particle wear away, the extruding of material fragment and punch-die do not bring about film with the element such as the heart to fall off invalidation, so one enclothes a mould to be in its need to repeat normally in process of whole service life finish craft of plating hard chromium a few times. Additional, once the mould sets the burn-in or moves a model need when changing,good chromic technology also cannot satisfy plating. The diffusion technique of plasma of pulse of PPDTM (Pules Plasma Diffusion) that Baerchasi develops Ou Ruikang can solve afore-mentioned plating effectively the problem of good chromic technology, its structure, a ply is formed to be 10 ～ in matrix surface 30 μ M, the nitrogen that hardness amounts to HV1100-1200 changes compound layer (the nitrogen of γ photograph and ε photograph changes iron) , and diffuse to matrix interior form deepness to be able to be amounted to 0.

3 ～ 0.

5mm, hardness reachs li of even nitrogen that is HV800-300 to change diffusion layer by the watch. Because PPDTM is,reach li of diffusion layer that forms to base material interior by the watch, won't happen below any use environments fall off, at the same time its hardness is till,by exterior HV1200 inward ministry is decreased successively equably stage by stage the base material hardness of core and deepness can is as deep as 0.

5mm, form to case hardening layer prop up effectively, the film that although bear in the mould,also won't be out of shape because of base material plasticity when load greatly relatively and causes the appearance so falls off invalidation (Bao Bing effect, refer to below one paragraphic) . Besides, no matter be,the advantage of PPDTM still has the face in Yu Jimo be before PPDTM processing or later can burn-in, also can undertake handling to the surface with oilstone, go to the lavatory thereby contented design change and the need that move a model. In the meantime, the mould material range that PPDTM can treat is very wide, from of all kinds and cast-iron can undertake to steel of of all kinds tool PPDTM is handled. PPDTM still has unparalleled dominant position to depend on, because PPDTM equipment size is very enormous, the largest sheet that can handle mould dimension can be amounted to 2.

7m × 10m, the largest sheet the mould hefts 25 tons, weight of full furnace mould amounts to 40 tons. Inside panel / structural member -- cold punch shapes the panel inside the mould is compared commonly because of workpiece appearance complex and use high strenth board increasingly, the proportion that structural member uses high strenth board because of intensity and rigid requirement is higher, because this covers an integral property to the mould two kinds this,ask taller, its mould is used normally set spell a structure, set piece use D2 mostly kind cold make tool steel, set piece finishing home uses PVD coating technology mostly at present or TD is handled. From the point of global limits, the applied popularity rate that PVD is in Europe is top, at present the mould finishing of European majority uses PVD, little part uses CVD, did not use TD basically; In last few years the market proportion of PVD also raises the United States and Korea significantly, have greatly dress to Europe the climate that supersedes TD completely with PVD; Connect the matrix Japan of TD, in last few years the application of PVD also gains ground more and more. The craft temperature that because its control high temperature 1000 degrees,TD handles can make mould generation is out of shape be in even certain needle horn occurrence stress craze causes the position that waits for concentration of easy generation stress thereby the mould discards as useless, and the craft temperature of PVD coating has 450 to go to 500 degrees only, the high temperature temper that wants mould rolled steel to pass 500 degrees of above 3 times only so (wait with the D2/SKD11/2379/Cr12Mo1V1 with punch mould commonly used place cold make tool steel be exemple, craft of its standard heat treatment is 1030-1070 is spent quench, the high temperature temper that 3 times 505-515 spends, heat preservation time 3 hours of above) , the mould after be being handled under the PVD coating of temperature of rolled steel temper in craft temperature is to won't produce metabolic. Additional, stem from design change and improvement Ban gold the need of the respect such as dimension, burn-inning to enclothe a mould to go up in the car is widespread presence, PVD coating because its craft temperature is far under TD, happen in process for opposite TD burn-in the wind strategically located and difficult of access that area stress craze brings about mould invalidation thereby is small much. Moreover, because the craft principle of TD is to need the vanadium from inside element of carbon of the separate out inside high-carbon steel and bath salt / niobium / titanium / the tantalum such as chromium combines carbonization vanadium to wait for carbide, its but answer besmear sex as element of the carbon in rolled steel decreasing is very finite, and PVD coating comes up from theory say OK and infinite ground answer besmear, and although be after TD cladding invalidation OK also fade drops TD cladding to be again next on the mould the service life that coating of answer besmear PVD prolongs a mould greatly thereby. But the one big drawback of common PVD coating is, although its hardness can achieve HV3000 above, but ply has 3 ～ only normally 5 μ M, the photograph is highest to hardness the mould base material that also does not cross HV600-700, its as good as is in a on soft albumen at enclothing thin thin chorion, once bear bigger concussion load, because albumen itself is too soft,meet, can't the load with so great burden and generation plasticity is out of shape the rupture that causes chorion thereby, we say for " chorion effect " or " Bao Bing effect " . Be aimed at this one defect, baerchasi developed Ou Ruikang a kind of newest BALINIT®Technology of DUPLEX LUMENA coating, undertake to mould base material LPN low-pressure nitrogen changes processing above all, deepness is formed to be able to amount to 50 ～ in surface of mould base material 200 μ M, hardness reachs li of even nitrogen that decreases successively to HV700 successive from HV1200 to change diffusion layer by the watch, increased the carrying capacity of mould matrix itself greatly thereby; In the meantime, through optimizing the technical parameter of PVD coating, the ply of the PVD coating that melts azotic aluminium titanium radical raises 8 ～ 15 μ M, exterior hardness can be as high as HV3400, the nitrogen that raised whole further thereby is changed + of PVD coating combat impact strength, the integral performance such as compressive strength and wearability. Help an issue about pressing the exists generally face in extending a pattern, its are main because,the reason is between armor plate and mould surface the clash that the place of impurity of grain of a few horniness of be mingled with causes wear away, 2 because armor plate and mould chafe between this pair of metals,be deputy because the surface is scraggly generation is mechanical and occlusive and those who bring about is adhesion model wear away. In the light of adhesion model wear away, besides chafe through the change deputy among them at the same time if material attribute uses phosphor to spend spring, PVC plastic film is stuck on armor plate, lube or EP additive are used in punch process, mould material uses the method such as cupreous radical alloy and mould surface to do PVD or TD processing outside, the most efficient way still passes polishing to reduce the attrition between the metal in order to improve mould surface surface roughness thereby deputy the coefficient of friction between. The experiment makes clear, the coefficient of friction between steel and steel reachs minimum when M of μ of Rz 1 of exterior surface roughness, exterior surface roughness can increase machinery too high occlusive, too low because a meeting chafes deputy between generation vacuum adsorption brings about coefficient of friction to increase quickly thereby. But at present domestic car covers a mould industry general for because want to drive the polishing capacity of time limit for a project or oneself of be confined to, the final surface surface roughness of its mould is in generally speaking Ra0.

Above of 4 μ M. Be aimed at domestic mould market this one general situation, baerchasi deployed Ou Ruikang the polish that professional mould polish group offers PVD coating from beginning to end for the client's mould serves, the exterior surface roughness of working face of the mould when making deliver the goods finally achieves Ra0.

08 ～ 0.

15 μ M. Structural member -- hot strike out mould is like A/B column to strengthen structural member of a few crucial position further, strengthen bridge, prevent the intensity that bumps into lever and bumper to wait and tigidity, at present Euramerican car company uses hot strike out technology increasingly already. This kind of craft is it is OK to use if the armor plate of heat treatment aggrandizement contains boracic armor plate, use heating installation to heat armor plate first 900 degrees are controlled and heat preservation sends into hot strike out mould to make pulling delaying shaping to be reduced greatly thereby shape quickly again difficulty, the cooling system of more than heat and mould checks work of the recycle after shaping the workpiece after shaping undertakes martensite is changed quenching handling making the in-house metallographic of workpiece is organized in order to achieve aggrandizement result, the tensile strength of the workpiece after classics overheat strike out craft is handled can amount to 1500MPa above. Hot punch armor plate can be divided for naked board and beforehand coating board two sort, naked board cost is relatively inferior, but defect is armor plate surface can produce oxidation layer because of high temperature, the ability after the spare parts after shaping so must undertake bolus handles purify oxidation layer casting first undertakes besmearing installing; At present more and more the technology that is used generally is to use besmeared the armor plate of aluminous silicon coating is like USIBOR 1500P armor plate beforehand, use hot punch to shape make armor plate surface forms iron aluminum-silicon alloy changes a layer, because the surface does not have oxidation,the layer can realize direct besmear outfit thereby. Hot strike out craft to shaping the function of the mould raised taller requirement, it is the cooling uniformity when the mould must have more complex cooling system to undertake in order to assure quenching to armor plate; The 2 working temperature that are a mould are to be in 800 ℃ of 600 ～ , mould rolled steel must from cold make tool steel instead heat up tool steel, the mould must bear below working status the high temperature that from 600 ～ 800 ℃ control circulates to the heat of room temperature, easy because heat up exhaustion and mechanical and fatigue double re-act to be used in mould surface,produce chap; In the meantime, no matter be naked board the oxidation skin that the surface forms because of high temperature oxidation or beforehand the aluminous silicon coating that coating board surface besmears beforehand, fall off extremely easily below action of high temperature high load and adhesion is brought about thereby in mould surface adhesion model wear away. Baerchasi is aimed at Ou Ruikang technically the BALINIT that hot strike out craft develops®ALCRONA Mod coating has exceedingly good high temperature wearability, its surface hardness amounts to HV3200, ply is 8 ～ 10 μ M, top job temperature can be amounted to centigrade 1100 degrees, in Bentele, the application on the hot strike out of the company such as Haisitanpu mould obtained very good result, mould life can be lengthened generally one times even certain case was lengthened double, still can shorten significantly at the same time the time that the machine stays line cleanness mould, promote the surface of stamping workpiece quality. CNC Milling