200911409 九、發明說明： 【發明所屬之技術領域】 本發明是有關於一種自鑽螺 一種利用接合異種金屬製作耐 &方法，特别是指 【先前技術】 麵自鑽螺絲之方法。 如圖！所示，習知之不銻麵自 11及一鑽頭部12，由於該鑽頭部B、/、1具有一螺身部 在鑽入一物體時負責切削的主要邛2八是該不銹鋼自鑽螺絲i 部11要高，因此-般製作該不銹二鑽2度需較該螺身 部11及該鑽頭部12皆會採用不同、，1時，其螺身 銹鋼來製作該自鑽螺絲之螺身 ，例如使用304型不 含碳量在0.3%左右之中碳鋼戶;’而該鑽頭部12則是以 絲！在製作上是首先將該不錄鋼之螺身部知鋼自鑽螺 頭部12以電阻對焊之方式將兩者相互連帛連=鋼之鑽 品再經過切削、績直及攻牙步 接後之半成 由一硬化處理使其達到鑽削所需之硬度、。有螺、次’之後再藉 η及：2二所示’電阻對焊所產生之高溫會使該螺身部 及該鐵頭部12的材料融化，並在兩者間型成-連結處13 一，而鄰近该連結處13之區域（如圖中虛線所示）亦可被稱做 一熱影響區200”。在經由電阻對焊連結時材料的融化會產 f溢出物100 ’且該溢出物⑽會在電阻對焊程序結束後隨 著快速冷卻在該螺身部u及該鑽頭部12之連結處Μ表面 形成一相當堅硬之突出區域，且該熱影響區2〇〇本身亦會 產生硬化，不利於後續之切削該溢出物100及攻牙製程。 200911409 如需解決此問題，理應先將該焊接後半成品進行回火軟化 處理，並讓該溢出物100及該熱影響區200軟化後，再將 該溢出物100创除以方便後續之攻牙步驟，但回火處理有 其困難性’因為回火會導致為不銹鋼之該螺身部u的耐蝕 性下降，也會增加整體製程的複雜度及成本，所以一般在 業界幾乎不採用，而是直接進行_除程序，並對仍帶有 堅硬的該熱影響區200的不銹銅自鑽螺絲丨半成品，進行 攻牙步驟。但是，如直接對過度硬化之該熱影響區細半 ，品進行攻牙’會加快攻牙模具的磨損率並使其汰換率提 南’並且降低製出產品之品質。 再者’由於該未攻牙前之不錄鋼自鑽螺半成品之工作 表面’具有一突出區域而非—平整的面，加上該突出區域 之部分又較該工作表面之其他區域要堅硬，當對該不錄鋼 自鑽螺半成品該進行攻牙時，會造成該攻牙模具的磨損不 平均’且该攻牙；^具的磨損較難偵測，很難在磨損時馬上 谓測出並立即更換’導致在該攻牙模具已磨損卻又未立即 更換的情況下即會產出如圖3所示之變形的不良品3〇〇。 另外’為了配合該鑽頭部12的中碳鋼材質，一般在該 焊接後回火以及鑽頭部硬化處理步驟中，中碳鋼材中的碳 會與不錄鋼材的鉻結合沉積於該連結處13之晶界處，造成 晶界的脆化，且獨鋼之螺身部U亦會因自身錢鉻析出 在晶界，也就是俗制，，敏化（SensitizatiQn)，，，而#材料敏 化後其抗❹性會降低，因此，f知之不錢鋼自鐵螺絲工 不論是在材料選擇或是製造方法上皆有許多可以改善的空 6 200911409 間。 【發明内容】 因此，本發明之目的，即在提供一種能避免電阻對焊 後在兩材料之連接處形成的硬化組織，以有效改善模具的 不平均磨損現象，並提升不銹鋼自鑽螺絲之耐蝕性。 、 於是，本發明之接合異種金屬製作耐蝕自鑽螺絲之方 法’包含.—螺身部製備步驟、一鑽頭部製備步驟、—焊 接連結步驟、一溢出物切削步驟、一攻牙步驟，及—低溫 時效強化步驟。 _ ^ , 一网^ 吻啄聋部 之材質是選自下列所構成之群組：沃斯田鐵系不銹鋼、雙 相不銹鋼及鎳基合金。該鑽頭部製備步驟是以含碳量在 0.1%以下的低碳析出強化合金鋼材為材料，製作—鑽頭部 並備用’該焊接連結步驟是利用電阻對焊工法將該螺身部 及該鑽頭部相互連結固定，該溢出物切削步驟是將電阻對 焊後所產生之溢出物予以切削剖除，該攻牙步驟是對相互 連結後之關身部及該_部進行攻牙，而純溫時效強 =步驟即是對攻牙後之半成品，進行攝氏獅度以下㈣ 處理使其鑽頭部硬化。 本發明之功效在於分別利用不錄鋼及低碳析出強化合 :鋼材來製造該螺身部及鑽頭部，使兩者在經過電阻對焊 =時其連接處不會產生硬化之情形，有利於後續攻牙步 驟的實施並減低攻牙模具的磨損，且其攝氏駕度以下之 低溫時效強化步驟，可降低該螺身部之不銹鋼材料的敏化 200911409 程度（意即該成品擁有較佳的耐蝕性）的前提下達到應有的硬 度。 【實施方式】 有關本發明之前述及其他技術内容、特點與功效，在 以下配合參考圖式之一個較佳實施例的詳細說明中，將可 清楚的呈現。 在本發明被詳細描述之前，要注意的是，在以下的說 明中，類似的元件是以相同的編號來表示。 如圖4所示，本發明接合異種金屬製作耐蝕自鑽螺絲 之方法的較佳實施例，包含一螺身部製備步驟41、一鑽頭 部製備步驟42、-焊接連結步驟43、—溢出物切削步驟μ ，一攻牙步驟45，及一低溫時效強化步驟46。 首先進行該螺身部製備步驟41，在本實施例中，該螺 身部製備步驟41是以3〇4L型不銹鋼為材料製作一螺身部 並=，但其㈣也心是其他種社㈣明系不鱗鋼 為限目不銹鋼或是錄基合金，所以不應以本實施例之說明 θ者㈣鑽頭部製備步驟42，該鑽頭部製備步驟42 析出強化合金鋼材為材料來製作-鑽頭部並備用 崎下’該低碳析出強化合金鋼材可 ：=)在 如 17-4ΡΗ、ΡΗ13_8Μ〇、155ρΗ、17_、強化不錢鋼 等，在本實施例中是採用17_4ΡΗ型的的析出^=0型 值付&的疋’由於在該螺身部製備步驟“及 200911409 該鑽頭部製備步驟42中㈣之成形機、模具等相關設備皆 為現有之產品，其運作原理及操作細節對熟知此項技藏的 相關人員來說應屬相當習知之事項，所以在此並不加以贅 述。 一接著進行該焊接連結步驟43，該焊接連結步驟43是將 别述一步驟製出之該螺身部及該鑽頭部利用電阻對焊相互 地連結固$ ’雖,然在電阻對焊過程時的高熱會使該螺身部 及_部連結時如習知般在其連結處形成一熱影響區， 於該鑽頭部是以低碳析出強化合金鋼材所製成，其含 石'里t均低於〇.〇8%，而析出強化合金鋼材在此含碳量下 電Γ對焊並不會形成硬化之熱影響區，焊接時的溢出 物也不會如習知之决屮极加时孟 卢裡ρ 之/皿出物瓜堅硬，因此本發明不需經回火 :::::::續之冷加工―攻牙)，有利於 乂之包阻對焊工法為業界常用之-焊接手段，苴工 用及：作細節對熟知此項技藝的相關人員來說應屬相 田“二事項，所以在此並不加以贅述。 曰將t進行該溢出物切削步驟44，該溢出物切削步驟44 Μ對焊後所產生的溢出物予以切_除，以提供 ::冷加工製程一個平整的工作面，進而減低對模具： 知之吝。本步驟中所用於切削包,J除該溢出物的設備也屬習 〇產品，所以在此並不加以贅述。 後之trrt牙步驟45，該攻牙步驟45是對相互連結 Μ ” 。卩及该鑽頭部進行攻牙，並在攻牙後於該螺身 200911409 口p及㈣頭部上形成螺紋，由於經過該焊接連結步驟衫中 之電阻對焊過後的半成品並不會具有硬化之熱影響區，且 在電阻對焊時所產生的溢出物已在該溢出物切削步驟料中 ㈣除，因此攻牙用之攻牙模具的磨損率也不會如習知般 嚴重再者，„亥半成品在經過該溢出物切削步驟Μ後即具 平正的工作面，因此該攻牙模具不會如習知般有不平均 磨知的現象產生’有利於延長攻牙模具的使用壽命，進而 節省運作成本。 日接著進行低/JHL時效強化步冑46，該低溫時效強化步驟 疋對攻牙後之半成品進行攝氏5〇〇度以下的熱處理並使 〇產生析出硬化’在本實施例中，攻牙後之半成品是經過 J π之攝氏450度的低溫時效處理，使其硬化並達到鑽 肖4所需之硬度。由於沃斯田鐵系不錄鋼於攝氏〜麵度 之溫度範圍加埶易導絲球# & 7 ,, 、、、约¥致碳化物的析出而降低其耐蝕性，因 此本製程採用攝氏1Μ τ 氏500度以下之溫度來進行低溫時效強化 〇 配σ圖5所不，由於此道工序並不像習知之硬化處理 k程般疋使用攝氏5GQ度以上的高溫，因此材料的敏化程 日相對於餐知要小，意即相較於習知之情況下，利用本發 :，接合異種金屬製作耐蝕自鑽螺絲之方法所製出之自鑽 螺絲成品400具有較佳的耐颠性，有利於提升該自鑽螺絲 之耐用性’進而增加其市場競爭力。 另外’本發明之另—優點在於：如採用3隱型不錄鋼 ‘、'、该螺身部之材料’並搭配採用17_4pH型析出強化不錄鋼 10 200911409 為5玄鑽頭部之材料（304L型搭配PH13-8MO型亦可），由於 兩者的電阻特性及材料熱電阻效應均較習知之3〇4l搭配碳 鋼材要接近，因此使该焊接連結步驟43中的電阻對焊工法 可*度亦大幅提升。另-方面’由於所採用之該鑽頭部之 材料亦為不銹鋼來取代習知之碳鋼，因此無形中大幅提升 該自鑽螺絲成品4〇〇的整體耐腐蝕性。 F納上述，本發明之接合異種金屬製作料自鑽螺絲200911409 IX. Description of the Invention: [Technical Field of the Invention] The present invention relates to a self-drilling snail. A method for making a resistance-resistant method using a dissimilar metal, in particular, a method of self-drilling a surface of a [prior art] surface. As shown! As shown, the conventional one is from 11 and a drill bit 12, since the drill portion B, /, 1 has a screw portion that is responsible for cutting when drilling an object, the main 邛 2 is the stainless steel self-drilling screw i The portion 11 is high, so the second diameter of the stainless steel 2 is required to be different from that of the screw portion 11 and the drill portion 12, and at 1 o'clock, the screw body of the screw is used to make the screw of the self-drilling screw. For example, the type 304 is carbon-free in a carbon content of about 0.3%; and the drill 12 is silk! In the production, the unsteered steel body of the self-drilling screw head 12 is first connected to each other by resistance butt welding. The diamond drill is cut, straightened and tapped. The latter half is hardened to achieve the hardness required for drilling. The snail, the second 'after the borrowing η and: 2 2', the high temperature generated by the resistance butt welding will melt the material of the screw body and the iron head 12, and form a joint between the two. One, and the area adjacent to the joint 13 (shown by a broken line in the figure) may also be referred to as a heat affected zone 200". The melting of the material upon connection by resistance butt welding may produce a spill 100' and the overflow The material (10) forms a relatively hard protruding area on the surface of the joint between the screw portion u and the drill portion 12 after rapid completion of the resistance butt welding process, and the heat affected zone 2 itself is also generated. Hardening is not conducive to the subsequent cutting of the spill 100 and the tapping process. 200911409 To solve this problem, the welded semi-finished product should first be tempered and softened, and the spill 100 and the heat affected zone 200 are softened. And then the spill 100 is created to facilitate the subsequent tapping step, but the tempering treatment has its difficulty' because the tempering causes the corrosion resistance of the screw portion of the stainless steel to decrease, and the overall process is also increased. Complexity and cost, so generally in the industry Almost no use, but a direct _ removal procedure, and a stainless steel self-drilling screw 丨 semi-finished product still with a hard heat affected zone 200, but the direct impact on the thermal impact of excessive hardening In the semi-finished area, the product will be tapped, which will speed up the wear rate of the tapping die and reduce its replacement rate and reduce the quality of the manufactured product. In addition, 'because the un-recorded steel self-drilling screw The working surface of the semi-finished product has a protruding area instead of a flat surface, and the part of the protruding area is harder than other areas of the working surface, when the non-recorded steel self-drilling semi-finished product is tapped, Will cause the wear of the tapping die to be uneven 'and the tapping; the wear of the tool is difficult to detect, it is difficult to detect and immediately replace it when it is worn out', resulting in the tapping die being worn but not immediately In the case of replacement, the defective product 3〇〇 deformed as shown in Fig. 3 is produced. In addition, in order to match the medium carbon steel material of the drill portion 12, it is generally in the tempering after the welding and the hardening step of the drill portion. , carbon in medium carbon steel It will be deposited on the grain boundary of the joint 13 with the chromium which does not record the steel, causing the embrittlement of the grain boundary, and the screw body U of the steel can also be precipitated in the grain boundary due to its own money, which is also customary. , SensitizatiQn,,, and # material sensitization will reduce its resistance to tampering, therefore, knowing that the steel from the iron screw workers, there are many improvements in material selection or manufacturing methods. 6 200911409. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a hardened structure that can be formed at the junction of two materials after resistance butt welding to effectively improve the uneven wear of the mold and to enhance the stainless steel Corrosion resistance of the drill screw. Thus, the method for manufacturing the corrosion resistant self-drilling screw of the dissimilar metal of the present invention includes: a screw body preparation step, a drill portion preparation step, a weld joint step, a spill cutting step, and a The tapping step, and the low temperature aging strengthening step. _ ^ , One net ^ The material of the snout is selected from the group consisting of: Worthfield iron stainless steel, duplex stainless steel and nickel based alloy. The step of preparing the drill portion is to produce a drill portion by using a low carbon precipitation strengthening alloy steel having a carbon content of 0.1% or less as a material. The welding joining step is to use the resistance butt welding method to the screw portion and the drill portion. The joint is fixed by a joint, and the overflow cutting step is to cut and cut the overflow generated by the resistance butt welding, and the tapping step is to tap the joint portion and the portion after the mutual connection, and the pure temperature aging The strong = step is the semi-finished product after the tapping, and the following is performed under the Celsius lion degree (4) to harden the drill bit. The utility model has the advantages that the screw body and the drill portion are respectively manufactured by using non-recording steel and low-carbon precipitation strengthening steel: steel, so that the joint does not harden when the resistance is butt welding== The subsequent tapping step is implemented to reduce the wear of the tapping die, and the low temperature aging strengthening step below Celsius can reduce the sensitization of the stainless steel material of the screw body to the degree of 200911409 (that is, the finished product has better corrosion resistance) To achieve the desired hardness under the premise of sex. The above and other technical contents, features, and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments. Before the present invention is described in detail, it is noted that in the following description, like elements are denoted by the same reference numerals. As shown in FIG. 4, a preferred embodiment of the method for bonding a dissimilar metal to a corrosion resistant self-drilling screw according to the present invention comprises a screw portion preparation step 41, a drill portion preparation step 42, a solder joint step 43, and a spatter cutting. Step μ, a tapping step 45, and a low temperature aging strengthening step 46. First, the screw body preparation step 41 is performed. In the embodiment, the screw body preparation step 41 is a screw body made of 3〇4L type stainless steel and is =, but (4) is also a kind of other species (4) The Ming non-scale steel is a limited-head stainless steel or a recording base alloy, so it should not be described in the embodiment θ (four) drill portion preparation step 42, the drill portion preparation step 42 precipitation strengthening alloy steel as a material to make - drill portion And the alternate Saki's low carbon precipitation strengthening alloy steel can be: =) in the case of 17-4 ΡΗ, ΡΗ 13_8 Μ〇, 155 ρ Η, 17 _, reinforced steel, etc., in this embodiment, the precipitation of 17_4 ΡΗ type is used ^ 0 The molding machine, the mold, and the like in the preparation step of the screw portion and the manufacturing process in the step (42) of the drill portion preparation step 42 are all existing products, and the operation principle and operation details are well known to the user. The relevant personnel of the technology collection should be quite familiar, so it will not be described here. First, the welding connection step 43 is performed, and the welding connection step 43 is the screw portion which is prepared in another step. And the drill section The electric resistance butt welding is mutually connected to each other. Although the high heat during the resistance butt welding process causes the screw portion and the _ portion to be joined, a heat-affected zone is formed at the joint thereof as is conventionally known. It is made of low-carbon precipitation-strengthened alloy steel, and its stone containing 'li" is lower than 〇.〇8%, and the precipitation strengthening alloy steel has no heat effect on hardening of the electric iron under this carbon content. In the area, the spills during welding will not be as good as the conventional ones. Mengluli ρ / 皿 瓜 瓜 hard, so the invention does not need to be tempered::::::: Continued cold processing - attack Teeth), which is conducive to the resistance of the 对 对 对 对 焊 焊 焊 焊 焊 焊接 焊接 焊接 焊接 焊接 焊接 焊接 焊接 焊接 焊接 焊接 焊接 焊接 焊接 焊接 焊接 焊接 焊接 焊接 焊接 焊接 焊接 焊接 焊接 焊接 焊接 焊接 焊接 焊接 焊接 焊接 焊接 焊接 焊接 焊接Narration. The overflow cutting step 44 is performed, and the overflow cutting step 44 切cuts the overflow generated after the welding to provide: a cold working process with a flat working surface, thereby reducing the mold: . The equipment used for cutting the package and J in this step is also a conventional product, so it will not be described here. After the trrt tooth step 45, the tapping step 45 is to tap the Μ 卩 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 2009 2009 2009 The semi-finished product after the resistance butt welding in the welding joining step shirt does not have the heat-affected zone of hardening, and the overflow generated during the resistance butt welding has been removed in the material of the overflow cutting step (4), so the tapping is used The wear rate of the tapping die is not as serious as the conventional one. The semi-finished product has a normal working surface after the cutting step of the overflow, so the tapping die does not have the same as the conventional one. The phenomenon of average wear and tear produces 'favors to extend the service life of the tapping die, thereby saving operating costs. Next, the low/JHL aging strengthening step 46 is performed, and the low-temperature aging strengthening step 热处理 heat-treating the semi-finished product after tapping to 5 degrees Celsius or less and causing precipitation hardening of the crucible'. In this embodiment, after tapping The semi-finished product is subjected to a low-temperature aging treatment of 450 ° C for J π to harden it and achieve the hardness required for drilling 4 . Because the Worthfield iron system does not record steel in the temperature range of Celsius ~ face degree plus the easy guide wire ball # & 7 ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, 1Μ τ A temperature below 500 °C for low-temperature aging strengthening 〇 σ Figure 5 is not, because this process is not like the conventional hardening process, using a high temperature above 5GQ, the sensitization process of the material The day is relatively small compared to the meal, which means that the self-drilling screw product 400 produced by the method of joining the dissimilar metal to the corrosion-resistant self-drilling screw has better resistance to the reverse, compared with the conventional case. It is beneficial to improve the durability of the self-drilling screw' and thus increase its market competitiveness. In addition, 'the other advantage of the present invention is that: if the 3 stealth type is not recorded steel', 'the material of the screw body' and the 17_4 pH type precipitation strengthening non-recording steel 10 200911409 is the material of the 5 Xuan drill part (304L) The type can be matched with the PH13-8MO type. Because the resistance characteristics and the material's thermal resistance effect are close to those of the conventional 3〇4l carbon steel, the resistance-welding method in the welding connection step 43 can be made. It has also been greatly improved. In addition, since the material of the drill portion used is stainless steel instead of the conventional carbon steel, the overall corrosion resistance of the self-drilling screw is greatly improved. In the above, the self-drilling screw of the joined dissimilar metal material of the present invention
St::產品利用以含碳量在〇.1%以下的低碳析出強 口金鋼材來製造其鑽頭部，並藉由其獨特之物理特性使 =在經過高溫電阻對料不會造成其熱料區的硬化，以 =續二該溢出物切削步驟44及該攻牙步驟45的冷加 :二此之外，本發明接合異種金屬製作耐㈣鐵螺 ，更能降低材料敏化之程度，進而使:=化步驟-品彻具有較佳之耐錄，有 Μ鑽螺絲成 造成的耐純不佳之_ ^改善習知之材料敏化所 惟以上所述者，僅為本發明之較㈣^之目的。 能以此限定本發明實施之範圍，即大 J而'，當不 範圍及發明說明内容所作之簡單的等效\明申請專利 屬本發明專利涵蓋之範圍内。 變化/、修飾，皆仍 【圖式簡單說明】 之不銹鋼自鑽螺絲是由二 之不銹铜自鑽螺絲的經過 圖1疋一示意圖，說明習知 種不同之材質之部分所製成； 圖2是一前視圖，說明習知 11 200911409 —連結製程後的半成品； 鑽螺絲經過攻 圖3是一前視圖，說明習知之 牙製程後的不良品； 圖4是—流程圖’說明本發明接人 自鑽螺綿夕士丄 + w乃拱口異種金屬製作耐蝕 -、、糸之方法的較佳實施例丨及 圖5是一前視圖，笱 自鑽螺絲成σ 成明利用該較佳實施例所製成的一 12 200911409 ' 【主要元件符號說明】 41…· …·.螺 身 部 製 備 步 驟 驟 45…… …攻牙步驟 42·. 鑽 頭 部 製 備 步 46…… …低溫時效強化 驟 步驟 43••… …·焊接連結步驟 400… …自鑽螺絲成品 44.•… …溢 出 物 切 削 步 13St:: The product uses a low-carbon precipitation strong gold steel with a carbon content of less than 11% to produce its drill bit, and with its unique physical properties, it does not cause hot materials after passing through high-temperature resistors. The hardening of the zone is followed by the cold addition of the overflow cutting step 44 and the tapping step 45. In addition, the present invention joins the dissimilar metal to make the (four) iron snail, which further reduces the degree of material sensitization, and further造:=化化-品品 has better resistance to recording, and has poor resistance to purity caused by boring screws _ ^Improve the material sensitization of the prior art, which is only for the purpose of (4) . The scope of the present invention can be limited to the scope of the invention, and the scope of the invention is not limited to the scope of the invention. The change/modification is still [simplified in the drawing] The stainless steel self-drilling screw is made of the second stainless steel self-drilling screw, which is shown in Fig. 1 and shows the parts of different materials. 2 is a front view, illustrating the conventional 11 200911409 - semi-finished product after the connection process; the drill screw through the attack 3 is a front view, illustrating the defective product after the conventional tooth process; FIG. 4 is a flow chart 'illustration of the present invention A preferred embodiment of a method for making a corrosion resistant -, and 糸 人 丨 w w w w w w 异 异 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨Example of a 12 200911409 ' [Major component symbol description] 41...···. Spiral part preparation step 45... ...Tapping step 42·. Drill part preparation step 46... ...low temperature aging strengthening step 43••... ...welding connection step 400... self-drilling screw finished product 44.•... spilling cutting step 13