修正本 1297365 九、發明說明： 【發明所屬之技術領域】 本發明麵關於—種表面處理方法，制是一種可提高模具材料 面硬度轉持模具原有材料娜之強化模具表面的複合氮化處理方 【先前技術】 德目ί ’壓禱及锻造模具在經過加工處理或生產一段時間後，常會在 ^tensHestress)^b^®^m^^^ I矣μΓ成^具破壞之根源，而降低模具的使用壽命。再者由於模 與^溫金屬接觸，因此在模具表面往往產生高溫溶融金屬 但0在肖#齡解決的方法雜行增加難表面之強度與硬度， 面二料具表面強度與硬度後，硬度的增加卻相對的降低模具表 面材科的_，進而產生嚴重的龜裂問題。 材料述壓鑄及鍛造模具其表面硬度之缺點，並使模具表面 命成二=努=足夠的輸，以降低模具之維護成本及延長使用壽 為心、而努力研發、突破之重點方向。 面：方====利用嫩化強化模具表 的材料_。 、υ面谷易磨耗之缺點並維持模具原有 【發明内容】 處理=明=:表^供-種利用複合氮化強化模具表面之 性，以有效=模硬化層’並兼具轉材料原有的韋刃 耐磨耗性與壽命。”、、”、、彳邊問題，同時增加壓鑄及鍛造模具的 處理麵姆罐模具表面之 本U之X目的’在於提供一種利用複合氮化強化模具表面之 1297365 你不士 修正本 處理方法，以增加模具的抗熱侵蝕性。 本U之又-目的’在於提供—翻職合氮化強化模具表面之 处理方法，其不會在模具表面產生氮化白層。 為達上述目的本發明一種利用複合氮化強化模具表面之處理方 2，其包括有下列步驟首私砂體對—模具進行第—次喷砂程序，接 =對模具表面進行氮化處理，再賴具進行第二次喷砂製程，最後對 1、具進行氣體氧化製程，以在模具表面形成—硬化層， 料原有的勒性。 茲為使貴審查委員對本發明之結構特徵及所達成之功效更有進 一步之瞭解與認識，謹佐以較佳之實施例圖及配合詳細之說明，說明 如後· 【實施方式】 請參閱第-圖所示’本發明之-種利用複合氮化強化模且表面之 處理方法係如步驟S1所示，首先將模具完成品進行清洗並進行硬度確 認，以判斷模具硬度是否合格，是否繼續下列的表面處理製程步驟， 其中判斷的準則為壓鑄模具（Die casting mold) :44-50 HF^， 模具（Hotforging mold):44-52 HRC;當模具硬度合乎壓禱模具44j HRC ’而鍛造模具44-52 HRC時，接續對模具進行步驟幻之碳化矽 喷砂（SiC blasting)步驟；隨後，再進行步驟S3之氣體氮化（㈣二 步驟；隨後如步驟S4所示，對模具表面再次進行碳化矽噴砂製程. 於模具置於一腔室内’並通入適當含氧氣氛，以對模具進行體知 化製程，如步驟S5所示，如此即可獲得如第二圖所示之模具表面钟二 型態，其包含有一基地（matrix) 10 ; —位於基地1〇外周複:产 化層12，以及一位於複合氣化層12外周緣的氧化層μ，1包人有: 氧化二鐵（Fe2〇3)與/或四氧化三鐵（Fe3〇4)。 _ 一 其中步驟S1之模具清洗步驟，乃是因壓鑄或鍛造模具經過加工^ 成或試模生產前，表面通常會殘留有脫膜劑、油質或其它雜質， 修正本 1297365 高溫回火時會產生化學變化，而可能影響模具表面狀況，所以可視模 具表面狀況，制斷是否必g在複合氮化強化處理前絲行模具的清 洗，而所使用之清洗溶劑為7(TC的美沙克隆溶劑。 、八 步驟S2與步驟S4所進行的碳化石夕噴砂操作所使用的噴砂的速度 及顆粒的大小和時間條件為喷砂介質為粒度2〇〜28μίγι之s丨·c，速度為 50 m/sec，時間可在1〇_上下，碳化石夕喷砂的步驟可用以消除=具 經過加工處理後於材料表面所形成的殘留張應力丨丨，因為 /此應力會造賴具材料絲缺陷的根源，而本發明躺賴具表面進 二處理所產生之壓_力(麵p「ess stfess)正好與此張應力互相抵 消’同時在㈣表娜成較顯密的喊，將使的材料的表面缺陷降 、乂防止口疲勞產生之龜裂，因此熟知該項技藝當知喷砂時間的長 短可視成品需求作些微的調整。 清參閱第二圖其係本發日月之模具表面經Z5小時的複合氮化強化 =理，之模具表面深度與硬度對麵絲，由财可發現經本發明之 複合氮化強化處理後之模具表面約議公釐⑽硬度達·⑴v) 以卜。 更者 明多閱弟四〜第四（d)圖，其係將經本發明表面處MODIFICATION 1297365 IX. DESCRIPTION OF THE INVENTION: TECHNICAL FIELD The present invention relates to a surface treatment method, which is a composite nitriding treatment for improving the surface hardness of a mold material and transferring the original material of the mold. [Prior Art] Demu ί 'Pray and forging molds are often processed at or after a period of time, often at ^tensHestress)^b^®^m^^^ I矣μΓ into the root of the damage, and reduce The service life of the mold. In addition, since the mold is in contact with the warm metal, the molten metal is often generated on the surface of the mold, but the method of solving the problem is to increase the strength and hardness of the hard surface, and the surface strength and hardness of the surface material are hardness. Increasing but relatively reducing the surface of the mold surface material, resulting in serious cracking problems. The material describes the shortcomings of the surface hardness of the die-casting and forging die, and makes the surface of the die become a sufficient reduction, so as to reduce the maintenance cost of the mold and prolong the life of the mold, and strive to develop and break the key direction. Face: square ==== Use the tenderization to strengthen the material of the mold table _.缺点 谷 谷 易 易 易 并 并 并 并 易 易 易 易 易 易 易 易 易 易 易 易 易 易 易 易 易 易 易 易 易 易 易 易 易 易 易 易 易 易 易 易 易 易 易 易 易 易 易 易Some have blade wear resistance and longevity. ",", "," 彳 edge problem, while increasing the surface of the die-casting and forging die processing surface of the mold can be used to provide a kind of composite nitriding to strengthen the surface of the mold 1297365 you do not modify the treatment method, To increase the thermal erosion resistance of the mold. The purpose of the present invention is to provide a method for treating the surface of the mold by tumbling and nitriding, which does not produce a white nitride layer on the surface of the mold. In order to achieve the above object, the present invention provides a treatment layer 2 for using a composite nitriding reinforced mold surface, which comprises the following steps: a first private sand body for the first blasting process of the mold, and a nitriding treatment of the surface of the mold. The rig is subjected to a second blasting process, and finally, a gas oxidation process is performed on the surface of the mold to form a hardened layer on the surface of the mold to obtain the original character. In order to give your reviewers a better understanding and understanding of the structural features and the efficacies of the present invention, please refer to the preferred embodiment and the detailed description, as described below. [Embodiment] Please refer to - As shown in the figure, the method for treating a surface using a composite nitriding reinforced mold is as shown in step S1. First, the finished product is cleaned and hardness is confirmed to determine whether the hardness of the mold is acceptable, and whether the following is continued. The surface treatment process step, wherein the criterion for judgment is Die casting mold: 44-50 HF^, Hotforging mold: 44-52 HRC; when the hardness of the mold conforms to the pressure mold 44j HRC' and the forging mold 44- At 52 HRC, the step of SiC blasting is continued on the mold; then, the gas nitridation in step S3 is performed ((4) two steps; then, as shown in step S4, the surface of the mold is again carbonized. Sandblasting process. The mold is placed in a chamber and a suitable oxygen-containing atmosphere is introduced to perform a body-forming process on the mold, as shown in step S5. The mold surface clock type shown includes a matrix 10; a base 1 〇 outer periphery: a production layer 12, and an oxide layer μ located on the outer periphery of the composite gasification layer 12, 1 package There are: iron oxide (Fe2〇3) and/or ferric oxide (Fe3〇4). _ One of the mold cleaning steps in step S1 is because the die-casting or forging die is processed or tested before production. The surface usually contains a release agent, oily or other impurities. Correcting the chemical change caused by the high temperature tempering of 1297365, which may affect the surface condition of the mold. Therefore, depending on the surface condition of the mold, whether the fracture is necessary or not The cleaning of the silk mold before the treatment, and the cleaning solvent used is 7 (TC methadone solvent.), the speed of sand blasting used in the carbon stone blasting operation performed in eight steps S2 and S4, and the size and time of the particles. The condition is that the blasting medium has a particle size of 2〇~28μίγι s丨·c, the speed is 50 m/sec, and the time can be 1 〇 _ up and down, and the carbon stone blasting step can be used to eliminate = after processing the material Surface formed The tensile stress is 丨丨 because the stress causes the root cause of the wire defect, and the pressure _ force (face p ess stfess) generated by the surface treatment of the present invention is exactly offset from the tensile stress. 'At the same time, in the (four) form Na Na into a more prominent shout, will make the surface defects of the material, and prevent the crack caused by mouth fatigue, so familiar with the skill knows the length of the blasting time can be slightly adjusted according to the needs of the finished product Refer to the second figure, which is the composite nitriding strengthening of the surface of the mold of the present day and the sun for Z5 hours. The depth of the mold surface and the hardness of the surface of the mold are determined by the composite nitriding treatment of the present invention. The surface is about 10 mm (10) and the hardness is (1) v). Moreover, Ming Duo read the fourth to fourth (d) diagrams, which will be through the surface of the invention.
理後之模具無市面上f見之模具表面氮化處理公司⑼下通稱為A =司）處理後之對照組模具進行比較，第四⑷圖與第四⑻圖係 刀，為經本發_A公司之模具截面表面顯微照細，而第四⑷圖 與第四（d) ®分別為經本發賴A公司表面處理後之模具表面距離鱼 硬度的測試結果圖表。 〃 铖由Τ’〜第四⑷圖可發現以下特點： 二經A公司献表面處理製絲面處理後賴具之氮化深度非常淺， j a〇2mm ’而經本發明所處理之模具氮化深度較深，約為 土 mm ’因此經本發明表鱗理後之模具賴侵佩象改善效益較 佳0 修正本 1297365 2·經A公司氮化表面處理後模具的表面氮化硬度為Hv 600 ;而經本發 明處理後之模具所具有的氮化硬度較高約為Hv850，因此經本發明^ 面處理後之模具對耐磨損抵抗較佳。 3·由截面金相組織觀察，可以發現經Α公司氮化表面處理製程後的模 具所具有之氮化深度雖然很薄，但仍有氮化白層(whjte丨ayer)之產生； 反觀本發明之氮化深度雖然較大，卻沒有白層之產生，因此經本發明 表面處理後之模具表面龜裂之風險相對較低。 接續，對經本發明處理後之模具與經A公司一般氮化處理後之模 具進行表面烊接後的電子顯微鏡照相圖。首先針對經本發明表面處理 後之模具進行模具表面焊接，其表面狀態如帛五（ai)目所示，隨後 進订顯微觀察如第五（a2)所示，由第五（a2)可發現該模具表面並 無龜裂，更者將模具焊接處切片於4〇〇倍率顯微鏡下觀察，其結果如 第五（a3)圖所示，由經第五（a3)圖可知經本發明複合氮化處理後 之模具於焊接後，模具表面並無龜裂。 /接續，再對經習知氮化處理的模具焊接部位第五（b1)圖進行顯 微圖相觀察，其結果如第五（b2)騎示可發翻賴龜裂，更者於 400倍率顯d鏡下觀察該悍接部位的截面，可發現該龜裂裂痕已延伸 至模具基底，對模具造成嚴重損傷。 更者，針對經本發明表面後之試片（ABP Plus)、未經表面處理的 空iUBIank)與經另—常見之表面碳化鉻（⑽）表面塗層的試片分 別進盯疲勞測試（如第六圖所示）、硬度測試（如第七圖所示）與腐姓 測试（如弟八圖所示）。 *第六圖可知經本發明表面處理後之試片具有較高的耐疲勞限， 在硬度上也與經鍍鉻處理後之試片相差甚微，在耐腐健上更是表現 k異日此可得知經本發明表面處理後之試#在耐疲勞度、硬度與抗 腐社整體表現較經氮化鉻表面處理之試片優異。 上所述’本_之強倾具表面的複合氮化處理方法具有提高 修正本 1297365 性、改善模具表面之熱龜裂、提高模具表面強度與硬 域較域密、_去除模賤•讀力與能夠去 面之放電白層(EDMIa帅以避免材料表面因放電白層所造 成之細_絲面產线難⑽），細讀歧碰韻壽命。 _ X上f述者’僅為本發明—較佳實施例而已，並義來限定本發 ，故舉凡依本發”料概騎述之雜、構造、特 ^及精神所為之均等變化與修飾，均應包括於本發明之中請專利範圍 【圖式簡單說明】 f圖係本發明強化模具表面的複合氮化處理方法之流程示意圖。 ^二圖係细本發明對模具進行複合氮化歧後的模具表面示意圖。 ί二圖係本發明之模具表碰2.5小時的複合氮化強化處理後之模具 表面深度與硬度對應關係表。 第四（a) ®係為本發明之模具截面表面顯微照相圖。 ，四（b)圖為對照組試#之模具截面表面顯微照相圖 第四（Ο ®係為經本發明表面處理後之模具表面距離與硬度的測試結 ，四⑷圖係:為對照組之模具表面距離與硬度的測試結果圖表。 第五（a1)〜第五⑻）圖為經本發明表面處理後之模具經表面谭接 後的顯微照相圖。 第五（b1) ®〜第五（b3)目為經一般表面氮化處理後之模具經表面 焊接後的顯微照相圖。 第六圖為經本發明表面處理後之試片（ABp p丨⑻、未經表面處理的空 f (Blank)與經碳化鉻表面塗層的試片疲勞測試結果圖表。 第七圖本發明表面處理後之試片（ABP Plus)、未經表面處理的空片 jBlanl°與經碳化鉻（⑽）表面塗層的試片硬度測試結果圖表。 第八圖本發明表面處理後之試片（ABP Plus)、未經表面處理的空片 修正本 1297365 (Blank)與經碳化鉻（CrN)表面塗層的試片腐蝕測試結果圖表。 【主要元件符號說明】 基地10 複合氮化層12 氧化層14The molds after the treatment are not compared with the control molds of the mold surface nitriding treatment company (9), which is called A = division), and the fourth (4) and fourth (8) drawings are the knives. The surface of the mold section of the company is microscopically fine, and the fourth (4) and fourth (d) ® are respectively the test results of the surface hardness of the mold after the surface treatment of the company. 〃 铖 Τ '~4 (4) map can be found the following characteristics: After the surface treatment of the surface treatment by the company A, the nitriding depth of the slab is very shallow, ja〇2mm 'the nitriding depth of the mold treated by the invention It is deeper, about soil mm'. Therefore, the mold after the scale of the invention has improved the effectiveness of the mold. 0 Revision 1297365 2. The surface nitride hardness of the mold after the surface treatment of the company A is Hv 600; The mold treated by the present invention has a higher nitriding hardness of about Hv850, and therefore the mold treated by the present invention is more resistant to abrasion. 3. Observed from the metallographic structure of the cross-section, it can be found that the mold after the nitriding surface treatment process of the company has a thin nitriding depth, but there is still a nitriding white layer (whjte丨ayer); Although the nitriding depth is large, there is no white layer, so the risk of surface cracking of the surface after the surface treatment of the present invention is relatively low. Next, an electron micrograph of the mold after the treatment of the present invention and the mold which has been subjected to nitriding by the company A is surface-bonded. First, the surface of the mold after the surface treatment of the present invention is welded, and the surface state thereof is as shown in Fig. 5 (ai), and then the microscopic observation is as shown in the fifth (a2), and the fifth (a2) can be found. There is no crack on the surface of the mold, and the die weld is sliced under a 4〇〇 magnification microscope. The result is shown in the fifth (a3) diagram, and the composite nitridation according to the present invention is known from the fifth (a3) diagram. After the treated mold was welded, there was no crack on the surface of the mold. /Continuous, and then observe the micrograph of the fifth (b1) of the welded part of the conventionally nitrided mold, and the result is as shown in the fifth (b2) riding, which can be cracked, and more than 400 times. Observing the cross section of the splicing site under the d mirror, it can be found that the crack crack has extended to the mold base, causing serious damage to the mold. Furthermore, for the test piece after the surface of the invention (ABP Plus), the unsurfaced empty iUBIank) and the other common surface chromium carbide ((10)) surface coating test, respectively, the fatigue test (such as The six-figure test, the hardness test (as shown in Figure 7) and the rot test (as shown in the figure of the eight). *The sixth figure shows that the test piece after the surface treatment of the present invention has a high fatigue resistance limit, and the hardness is also slightly different from that of the test piece after the chrome-plated treatment, and it is even more effective in the resistance to corrosion. It is found that the test # after the surface treatment of the present invention is superior in the fatigue resistance, the hardness and the overall performance of the anti-corrosion society than the test piece treated with the chromium nitride surface. The composite nitriding treatment method of the above-mentioned strong tilting surface has the improvement of the modified 1297365 property, the improvement of the thermal cracking of the mold surface, the improvement of the surface strength of the mold and the hard domain, the removal of the mold and the reading force. With the discharge white layer that can be removed (EDMIa handsome to avoid the thin surface of the material caused by the discharge of the white layer is difficult (10)), read the life of the collision. _ X上在者' is only the present invention - the preferred embodiment, and is intended to limit the present invention, so that the equivalents, structures, special features and spirits of the present invention are equally varied and modified. The invention should be included in the scope of the patent. [Simplified illustration of the drawing] f is a schematic flow chart of the composite nitriding treatment method for strengthening the surface of the mold of the present invention. The second mold is a schematic diagram of the surface depth and hardness of the mold after the composite nitriding treatment of the mold of the present invention for 2.5 hours. The fourth (a) ® is the surface of the mold of the present invention. Micrograph. Four (b) is the photomicrograph of the cross-section of the mold section of the control group. (Ο® is the test knot of the surface distance and hardness of the mold after the surface treatment of the present invention, four (4) diagram: The test result chart of the mold surface distance and hardness of the control group. The fifth (a1) to the fifth (8)) are photomicrographs of the surface of the mold after the surface treatment of the present invention. The fifth (b1) ® ~ fifth (b3) is the classic The photomicrograph of the surface after the surface nitriding treatment is generally welded. The sixth picture shows the surface treated sample of the present invention (ABp p丨(8), untreated surface f (Blank) and chromium carbide Test chart of fatigue test results of surface coatings. Figure 7 Hardness of test piece after surface treatment of the invention (ABP Plus), untreated surface blank jBlanl° and chromium carbide ((10)) surface coating Test result chart. The eighth chart of the surface test sample (ABP Plus) of the present invention, the untreated surface film modification 1297365 (Blank) and the chromium carbide (CrN) surface coating test piece corrosion test result chart [Main component symbol description] Base 10 composite nitride layer 12 oxide layer 14