201018736 六、發明說明： 【發明所屬之技術領域】 本發明是有關於一種組成合金，特別是指一種高爾夫 球鐵桿頭之組成合金。 【先則技術】 高爾夫球運動因其球場環境大自然化，且運動量和緩 ，同時，又是強調自我挑戰的球類運動，其運動年齡層可 從5〜6歲至80〜90歲，而為多數人喜愛的運動之一，該高 爾夫球運動所使用的高爾夫球桿頭大致可分為三大類·木 桿頭、鐵桿頭及推桿頭。 1、木桿頭： 木桿頭主要是要求需打得遠、直、準，而為擴大有效 擊球區，造型上朝向大型化發展，球具整體也朝向輕量化 發展，目前因為鈦合金具有高強度、高剛性，及低比重之 特性，可讓木桿頭之甜蜜區較大、聲音佳、打感好，也可 增加球速，保持方向之穩定性，故為開球木桿頭常用之素 材，而球道木桿頭，一般以不錄鋼材質為多；就木桿頭發 展方向而言，異素材結合之複合材質木桿頭因具創新性， 可創造配重以達最佳效果；而以新材質、新結構、新式樣 創造出最佳打感、最佳音感、最佳準度、最佳操縱感，及 具物理性能之木桿頭依舊是未來重要發展趨勢之—。 2、鐵桿頭： 。 鐵桿頭主要是將球擊至目標點，其特徵 向容易控制、擊球較高’飛行距離短等特性常： 3 201018736 材料以低成本材料或高延伸率特性為主，如：17. 4PH 、304SS、431SS，及軟鐵等素材，亦有將鈦 合金、455SS，及456SS等素材鍛造成薄板之打擊 面板，再鑲入球頭之本體上；而外觀造型也較趨向擴 大甜蜜區的方向發展，且新材質、新結構與複合材料及具 吸振效果的產品開發亦為其重要發展的方向；另外，亦 有將鐵桿頭製成空心之設計發展，使鐵桿頭同時兼 具木桿頭及鐵桿頭之優點。 3、推桿頭： 推桿頭主要則使用在果嶺上擊球入洞的時機所以 要能控制球的方向與距離，目前在造型上仍無一個標準， 因此在設計時注意造型美，在功能上注意重心之設計，其 意義即是如何維持推桿頭與中管桿配合時，打擊面板不致 於會旋轉，在製造上以精密鎿造為主，而近期亦有朝直接 使用CNC加工成型推桿頭，以維持設計重心之位置及保 持推桿頭之均勻性，在材料上，不鏽鋼材質目前仍為主流 〇 以高爾夫球鐵桿頭而言，目前高爾夫球鐵桿頭之設計 方向趨向於：（1)球頭大型化，以增域桿頭的擊球甜蜜區 ，進而提高成功擊球機率並增加擊球距離；（2)低重心化， 以達到穩定的揮擊性與較佳的擊球點位置，並增加扭轉慣性 ，提高擊球距離，低空氣阻力及凹背式打擊面板設計， 以達到穩定的揮擊性與較佳的擊球點位置。 而現有高爾夫球鐵桿頭之製造方式主要為精密脫壤铸 201018736 造法與鍛造加工法兩種，另亦有採用表面鑛層或鑲板加工者 ;.整體而言，雖然鍛造加工法具有較多方面的優點，但精密 脫蠟鑄造法的成本相對較低，此外，應用於高爾夫球頭之素 材，主要為鈦系合金及不鏽鋼系合金，鈦系合金常用素材如 6-4ΊΊ、2041、Ti735，不鏽鋼系合金常用素材如17-4PH、 455 SS、465 SS、475 SS ;以高爾夫球鐵桿頭來說，在固 定重量的限制下，其主要發展為尋求具備適當機械強度及高 延展性之素材，如17-4PH不鏽鋼、431不鏽鋼、255不鏽 鋼、N50不鏽鋼、N60不鏽鋼等，然而，就高爾夫球鐵桿 頭而言，雖然低重心、低空氣阻力及強化打擊面板亦可達到 成功擊球與良好擊球點、增加扭轉慣性，及提高擊球距離等 目的，但高爾夫球鐵桿頭本身形狀變化較多，所以用以製作 高爾夫球鐵桿頭的合金材料除了必須兼具適當強度及高延展 特性以外，同時另需具備有耐蝕性，以析出不鏽鋼為例，其 雖具有耐蝕性，強度亦佳，惟超出鐵桿頭所需甚多，且其延 伸率或韌衝值仍不盡理想，以AISI304不鏽鋼而言，其抗 拉強度大約為70-75ksi左右，雖然延伸率約可達40%-60% ，可增加擊球操控性，但球頭使用一段時間後，打擊面板之 角度會產生變化，亦即其強度仍嫌不足。 請參照圖1、2所示，其揭示現今高爾夫球鐵桿頭所使 用的合金材料之機械性質表，以及高爾夫球桿頭鐵基材料與 本發明組成合金之機械性質分布圖，分析該等不鏽鋼合金材 料的機械性質時，可發現目前商用鑄造用合金材料之抗拉強 度約在70-160ksi，延伸率約在12-40%，雖然其強度足夠 201018736 滿足高爾夫球鐵桿頭之強度需求，惟其延伸率仍嫌不足，導 致擊球感會比較差，因此，目前仍以S25C鍛造軟鐵（兼具 75-85ksi抗拉強度及大約30%延伸率）為製作高爾夫球鐵桿 頭之較佳素材，惟其锻造後之财#性稍嫌不足。 過去數十年來，鐵鉻鎳合金鋼系列受到廣泛的研究與 討論，研究顯示，經由不同的合金設計能使鐵鉻鎳合金鋼分 別具有高強度、高韌性、耐低溫、耐高溫，及耐磨耗等特性 ，其主要成份為鐵、鉻，及鎳，其中鉻元素的添加可增加合 金的抗氧化性和抗#性，而鎳元素的添加可穩定合金内的沃 斯田鐵相或麻田散鐵相，以改善鐵基合金的韌性；鐵鉻鎳合 金鋼之基本分類大致如下： (1) 沃斯田鐵系合金鋼： 其顯微結構為完全面心立方格子（Face centered cubic Lattice，F.C.C.)結構，基本成分為：16-26wt%之 鉻、8-25wt%之錄、0-6wt%之鉬，及0.08wt%以下之碳 ，其典型機械性質範圍：抗拉強度約60-80ksi，降伏強 度約45-60ksi，延伸率約40-60%。 (2) 肥粒鐵系合金鋼： 其顯微結構為體心立方格子（Body centered cubic Lattice，B.C.C.)結構，基本成分為：12-19wt°/〇之鉻、 0-5wt%之錄、5wt%以下之鉬，及0.25wt%以下之碳，其 典型機械性質範圍：抗拉強度約60-1 OOksi，降伏強度約 45-80ksi，延伸率約 20-30% ° (3) 肥粒鐵-沃斯田鐵系合金鋼： 201018736 其顯微結構為面心立方格子（FCC)與20%-50%體心 立方格子（BCC)雙相結構，基本成分為·· 18-27wt%之鉻 、4-7wt%之鎳、1-4wt%以下之鉬，及0.05wt%以下之碳 ;其典型機械性質範圍：抗拉強度約100-120ksi，降伏 強度-45-80ksi，延伸率約25-40%。 (4) 麻田散鐵系合金鋼： 其顯微結構為麻田散鐵結構，基本成分為：11 -18wt。/。之鉻、0-2wt%之鎳、2wt%以下之鉬，及0.17wt% 以下之碳，其典型機械性質範圍：抗拉強度約150-200ksi，降伏強度約140-180ksi，延伸率約10-15%。 (5) 麻田散鐵-沃斯田鐵系合金鋼： 其顯微結構為麻田散鐵與0%-20%沃斯田鐵雙相結構 ，基本成分為：12-18wt%之絡、4-6wt%之鎳、1-2wt°/〇以 下之鉬，及0.10wt%以下之碳，其典型機械性質範圍： 抗拉強度約120-160ksi，降伏強度約100-140ksi，延伸 率約 15-20%。 整體而言，以高爾夫球鐵桿頭來說，在固定重量的限制 下，其主要發展為尋求具備適當機械強度、高韌性、高延 展性，及優良之耐餘性等機械特性之素材，依據目前 高爾夫球桿頭製造的經驗，最佳的鐵桿頭合金材料之延伸 率需超過30%，且愈高愈好；另外，抗拉強度應達到鍛 造軟鐵之1.0-1.2倍左右（或304不鏽鋼之1.1-1.3倍左右） ，即抗拉強度應達到80-1 OOksi以上，而考量鐵桿頭 造型設計的可變性與商業價值，亦希望合金材料之抗 7 201018736 拉強度可達到6-4鈦合金之強度，即抗拉強度達到 140ksi左右；此外，合金材料亦必須通過35±3°C及 48-72小時之5%NaCI(抗鹽霧試驗）的環境測試，若符 合上述條件，則可製作出打擊性能最佳的高爾夫球鐵桿頭或 空心鐵桿頭。 【發明内容】 因此，本發明之目的，即在提供一種同時具備高強度及 高延展性的高爾夫球鐵桿頭之組成合金。 於是，本發明高爾夫球鐵桿頭之組成合金，包含16.3-17.2wt% 的鉻、5.8-6.5wt% 的鎳、0.10-0.20wt% 的氮、 0.01-0.10\^%的碳、0.3-0.8\/\^%的石夕，及0.3-1.0\^%的猛 ，其餘比例為鐵。 本發明之功效在於，藉由適當地調整氮含量，能在上述 組成合金形成鐵桿頭時，除了具備有基本的麻田散鐵相以外 ，更能同時幫助沃斯田鐵相的形成，而將上述組成合金經過 950-1150°C/0.5-2小時的固溶處理，不需時效熱處理，所成 型之鐵桿頭即能具有麻田散鐵與10-30%沃斯田鐵雙相基地 (matrix)之顯微結構組織，並具備130-145ksi之抗拉強度、 70-90ksi之降伏強度、35-55%之延伸率的機械性質，及具 有抗鹽霧試驗之耐蝕性，而能有效達到最佳化之機械強度、 延展性、防鏽性，及表面性質。 【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二個較佳實施例的詳細說明中，將可 201018736 清楚的呈現。 參閱圖3,本發明高爾夫球鐵桿頭之組成合金的第一較 佳實施例，是如圖3中編號1 -4之組成合金比例所示，而編 號13-16則是比較例，本較佳實施例是以編號1所顯示的組 成合金比例來作說明，而包含16.53wt%的鉻、6.51wt%的鎳 、0.16wt%的氮、0.67wt%的石夕，以及0.78wt%的锰，其餘比 例為鐵，上述組成合金經過1000°C固溶處理1小時後，不 需時效處理，所成型之鐵桿頭的機械性質為降伏強度 75.72ksi、抗拉強度132_15ksi，及延伸率47·56%，且所成 9 型之鐵桿頭經5%NaCl的抗鹽霧試驗48小時，及高爾夫球 砲擊3000發試驗均合格；再者，請參閱圖4所示，為本較 佳實施例成型之鐵桿頭鑄件内的合金材料所獲得麻田散鐵 與17%沃斯田鐵之結構金相圖，其金相組織為針狀的麻田 散鐵組織及塊狀的沃斯田鐵雙相組織，而圖5(a、b)及6(a 、b)所示，係分別為本較佳實施例成型之鐵桿頭鑄件内的合 金材料所獲得之麻田散鐵相區域及沃斯田鐵相區域的電子 φ 顯微鏡圖，圖4、5(a、b)、6(a、b)主要是為證明本較佳實 施例所成型之鐵桿頭鑄件内確實具有麻田散鐵與10 - 3 0 %沃 斯田鐵雙相基地（matrix)之顯微結構組織；整體而言，編號 1-4所顯示之組成合金比例經1000-1100°C固溶熱處理後， 其機械性質的降伏強度介於75.72-90.48ksi之間，抗拉強度 介於 132.15-143.20ksi 之間，延伸率可達 38.77%-47.56%， 且經5%NaCl的抗鹽霧試驗48小時及高爾夫球砲擊3000發 試驗均合格；反觀，由編號13 -16比較例所顯示之組成合金 9 201018736 比例可知，當本較佳實施例的氮含量低於O.lwt%時，則發 現其延伸率將會遠低於本發明之最低預定延伸率（低於35%) ，原因則在於所形成之沃斯田鐵相會比較少，所以，適當 地調整氮含量，能在上述組成合金形成高爾夫球鐵桿頭鑄 件時，除了具備有基本的麻田散鐵相以維持較高機械強度 以外，更能幫助沃斯田鐵相的形成而同時提高高爾夫球鐵 桿頭之延伸率；但是，要值得注意的是，若氮含量過多而 大於0.25wt%以上時，將使上述組成合金冶鍊產生過多的氣 體，而發生脆性特徵，因此，為展現最佳化高爾夫球鐵桿 頭之性能，本發明之組成合金的氮含量應控制在0.1 Owt%-0.20wt%之間。 仍請參閱圖3,本發明高爾夫球鐵桿頭之組成合金的第 二較佳實施例，是如圖3中編號5-12之組成合金比例所示 ，本較佳實施例是以編號11所顯示的組成合金比例來作說 明，而包含16.47wt%的鉻、5.60wt%的鎳、0.17wt%的氮、 0.57wt%的石夕、0.64wt%的猛、3.20wt%的銅，以及 0.276wt%的鈦（Ti)、鈮（Nb)、钒（V)之組合，其餘比例為鐵， 上述組成合金經過1〇〇〇°C固溶處理1小時加上時效600°C 之熱處理後，所成型之高爾夫球鐵桿頭的機械性質範圍為 降伏強度72.54ksi，抗拉強度 122.31ksi，延伸率可達 50.31%，且其球頭經5%NaCl抗鹽霧試驗48小時及高爾夫 球砲擊3000發試驗均合格；整體而言，編號5-12所顯示之 組成合金比例經1〇〇〇-11〇〇°C固溶處理與時效450-600°C熱 處理後，其機械性質範圍為降伏強度介於72.54-98.79ksi之 201018736 間，抗拉強度介於122_31-152.39ksi之間，延伸率可達 36.92%-50.31%，且經5%NaCl抗鹽霧試驗48小時及高爾夫 球砲擊3000發試驗亦均合格，所以本較實施例同樣能達到 與第一較實施例相同之具高強度及高延展性的效果。 需補充說明的是，以下將分別針對各種添加合金元素 之比例範圍及其對於本發明之組成合金性質的影響逐一說 明： 鉻（Cr):本發明之組成合金中添加鉻，有助於組成合金 對於腐蝕及氧化之抵抗性，且為使組成合金於控制麻田散鐵 Φ 基地與10%-30%沃斯田鐵之顯微結構，以展現最佳化高爾 夫球鐵桿頭之性能，本發明之組成合金的鉻含量應控制在 16.3%-17.2%wt 之間。 鎳（Ni):本發明之組成合金中添加鎳，主要為控制組成 合金之顯微結構，當鎳含量低於5.5wt%，將使該組成合金 之沃斯田鐵相較少，而使其延伸率低於本發明之最低預定延 伸率（35%);當鎳含量大於6.5wt%時，將使該組成合金之沃 斯田鐵相穩定，但相對會使其機械強度低於本發明之預定機 φ 械強度；因此，為使組成合金於生產過程中容易控制麻田散 鐵基地與10%-30%沃斯田鐵之雙相基地（matrix)顯微結構， 以展現最佳化高爾夫球鐵桿頭之性能，本發明之組成合金的 鎳含量應控制在5.8%-6.5wt%之間。 碳（C):碳元素基本上為一般鋼鐵材料不可或缺的元素 ，除了形成碳化物或氮化物外，其亦是麻田散鐵穩定相之元 素，在本發明之組成合金中，當碳含量過高時，將形成碳化 物，不利組成合金的耐姓性。因此，本發明之組成合金限定 碳元素在0.01-0.1 Owt%之間。 11 201018736 氮（N) ··在本發明之組成合金中，添加氮含量時，有利 於沃斯田鐵相的形成，相對有利於提升組成合金之延伸率， 當氮含量低於O.lOwt%，將使該組成合金之沃斯田鐵相較少 ，而使其延伸率低於本發明之最低預定延伸率（35%);當氮 含量大於0.25wt%時，將使該組成合金冶鍊產生過多的氣體 ，而發生脆性特徵，因此，為展現最佳化高爾夫球鐵桿頭之 性能，本發明之組成合金的氮含量應控制在0.10%-0.20wt°/〇 之間。 矽（Si):在本發明之組成合金内添加矽時，有利於防止 氣孔形成、增進收縮作用，及增加鋼液流動性，而能增加合 金鑄件之鑄造性，因此，本發明之組成合金若能添加0.3-0.8wt%之矽，將有助於提升合金鑄件之鑄造性。 錳（Μη):錳通常與鐵共存，由於錳容易與硫結合，故可 消除硫對於本發明之組成合金造成熱脆性之有害影響；再者 ，錳能去除組成合金中的氧化物；此外，錳亦可穩定組成合 金中的麻田散鐵相，因此，本發明之組成合金若能添加0.3- l_0wt%之錳，將有助於提升合金鑄件之鑄造性與脆性的改善 〇 銅（Cu):本發明之組成合金添加銅時，有利於使組成合 金具有抵抗大氣腐蝕之性能，並能提高析出強度，因此，本 發明之組成合金若能添加2.8%-3.2wt%之銅，將有助於提升 财蚀性與機械性質。 鈦（Ti)、銳（Nb)、叙（V):在本發明之組成合金内添加鈦 、鈮及釩時，可使合金晶粒細化與析出強化，因此，本發明 之組成合金若能添加0.15-0.5wt%之鈦、銳、飢的組合，將 有助於提升合金鑄件之機械性質。 201018736 - 綜上所述，本發明高爾夫球鐵桿頭之組成合金，是藉 . 由 16 3-17 2wt〇/o的鉻、5.8-6.5wt%的鎳、0.10_0_20wt%的 氮、〇.〇1-0_10wt%的碳、〇.3-〇.8wt%的矽，及 〇.3-l.〇wt% 的錳，其餘比例為鐵的組成成份，經過適當地熱處理條件 並調整氮含量，而能在上述組成合金形成高爾夫球鐵桿頭 時，除了獲致最佳強度之麻田散鐵相以外，更能同時幫助 具有最佳延展性之沃斯田鐵相的形成，藉以提供一種具有 麻田散鐵與10-30%沃斯田鐵雙相基& (matrix)之顯微結構組 • 織’而具備13〇_i45ksi之抗拉強度、70_90ksi之降伏強度， 及35-55 /〇之延伸率的高強度與高延展性組合之極佳機械性 質，若以具備此機械性質之組成合金製作高爾夫球鐵桿頭 ，將可發揮高爾夫球鐵桿頭或空心鐵桿頭的最佳要求確 實可以符合高爾夫球鐵桿頭最佳化之設計目的以提供最 佳化之機械強度、延展性、防鏽性及表面性質，實為製作 高爾夫球鐵桿頭之最佳不鏽鋼合金材料，故確實能達成本 發明之目的。 • 惟以上所述者，僅為本發明之較佳實施例而已，當不 能以此限定本發明實施之範圍，即大凡依本發明申請專利 範圍及發明說明内容所作之簡單的等效變化與修飾，皆仍 屬本發明專利涵蓋之範圍内。 【圖式簡單說明】 圖1是一機械性質表，說明習用高爾夫球鐵桿頭之組成 合金材料的機械性質； 圖2是一機械性質分佈圖，說明常用高爾夫球桿頭之鐵 基材料與本發明組成合金之機械性質分布態樣； 13 201018736 圖3是一比較表，說明本發明高爾夫球鐵桿頭之組成合 金的第一較佳實施例、第二較佳實施例，及比較例之比較； 圖4是一金相圖，說明本發明第一較佳實施例之高爾夫 球鐵桿頭鑄件的金相結構； 圖5(a)是一電子顯微鏡圖（明視野圖），說明本發明第一 較佳實施例之高爾夫球鐵桿頭鑄件中有關麻田散鐵相區域的 電子顯微鏡圖； 圖5(b)是一電子顯微鏡圖（[111]擇區繞射圖），說明該第 一較佳實施例中有關麻田散鐵相區域的電子顯微鏡圖； 圖6(a)是一電子顯微鏡圖（明視野圖），說明該第一較佳 實施例中有關沃斯田鐵相區域的電子顯微鏡圖；及 圖6(b)是一電子顯微鏡圖（[001]擇區繞射圖），說明該第 一較佳實施例中有關沃斯田鐵相區域的電子顯微鏡圖。 14 201018736 【主要元件符號說明】 無201018736 VI. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to a composition alloy, and more particularly to a composition alloy of a golf ball iron head. [First technique] Golf is naturally naturalized by the environment of the golf course, and the amount of exercise is gentle. At the same time, it is a ball sport that emphasizes self-challenge. The sports age can range from 5 to 6 years old to 80 to 90 years old. One of the favorite sports of the majority, the golf club head used in the golf ball can be roughly divided into three categories: wood head, iron head and putter head. 1. Wood head: The wooden head is mainly required to play far, straight and accurate. In order to expand the effective hitting area, the shape is oriented towards large-scale development, and the whole of the club is also moving towards lightweight development. Currently, because titanium alloy has High strength, high rigidity, and low specific gravity can make the sweetness of the wooden head larger, sound better, feel better, increase the speed of the ball, and maintain the stability of the direction, so it is commonly used for kicking wood heads. Material, and the fairway wood head is generally made of non-recorded steel material; in terms of the development direction of the wooden club head, the composite material wood head with different materials can create the counterweight for the best effect because of the innovation; And the new material, new structure, new style to create the best feel, the best sound, the best accuracy, the best sense of manipulation, and the physical performance of the wood head is still an important development trend in the future. 2, iron head: . The iron head is mainly to hit the ball to the target point, its characteristics are easy to control, the hitting is high, and the 'flying distance is short. The characteristics are often: 3 201018736 The material is mainly low-cost materials or high elongation characteristics, such as: 17. 4PH, 304SS, 431SS, soft iron and other materials, also titanium alloy, 455SS, and 456SS and other materials forged into a thin panel of impact panels, and then into the body of the ball; and the appearance of the shape tends to expand the direction of the sweet zone And the development of new materials, new structures and composite materials and product with vibration absorption effect is also an important development direction. In addition, there is also a design development in which iron heads are hollowed out, so that the iron heads have both wood heads and irons. The advantage of the head. 3. Putter head: The putter head mainly uses the timing of hitting the ball into the hole on the green. Therefore, it is necessary to control the direction and distance of the ball. At present, there is still no standard in the shape, so pay attention to the beauty in design. Functionally pay attention to the design of the center of gravity, the meaning is how to maintain the putter head and the middle tube rod, the striking panel will not rotate, the manufacturing is mainly based on precision manufacturing, and recently the direct use of CNC machining The putter head maintains the position of the design center of gravity and maintains the uniformity of the putter head. In terms of materials, stainless steel is still the mainstream. In terms of golf iron heads, the current design trend of golf iron heads tends to: ( 1) The ball head is enlarged to increase the hitting sweet zone of the field head, thereby improving the successful hitting rate and increasing the hitting distance; (2) low center of gravity to achieve stable swing and better hitting. Point position, and increase the torsional inertia, improve the hitting distance, low air resistance and concave back striking panel design to achieve stable swing and better hitting point position. The existing golf iron head manufacturing method is mainly for the precision de-soil casting 201018736 manufacturing method and forging processing method, and also the surface mineral layer or panel processing method; overall, although the forging processing method has more The advantages of the aspect, but the cost of the precision dewaxing casting method is relatively low. In addition, the materials applied to the golf head are mainly titanium alloys and stainless steel alloys, and the materials commonly used for titanium alloys are 6-4ΊΊ, 2041, Ti735, Common materials for stainless steel alloys such as 17-4PH, 455 SS, 465 SS, 475 SS; for golf iron heads, under the fixed weight limit, the main development is to seek materials with appropriate mechanical strength and high ductility. Such as 17-4PH stainless steel, 431 stainless steel, 255 stainless steel, N50 stainless steel, N60 stainless steel, etc. However, in terms of golf iron head, although low center of gravity, low air resistance and enhanced impact panel can achieve successful hitting and good hitting Point, increase the torsional inertia, and improve the hitting distance, etc., but the shape of the golf iron head itself changes more, so it is used to make golf irons. In addition to the proper strength and high ductility, the alloy material of the head must also have corrosion resistance. For example, stainless steel is corrosion-resistant and has good strength, but it is much more than the iron head. Its elongation or toughness is still not ideal. In terms of AISI304 stainless steel, its tensile strength is about 70-75ksi, although the elongation can reach 40%-60%, which can increase the handling of the ball, but the ball After the head has been used for a period of time, the angle of the striking panel will change, that is, its strength is still insufficient. Please refer to FIG. 1 and FIG. 2, which disclose the mechanical property table of the alloy material used in the current golf iron head, and the mechanical property distribution diagram of the iron-based material of the golf club head and the alloy of the present invention, and analyze the stainless steel alloy. When the mechanical properties of the material, it can be found that the current commercial casting alloy material has a tensile strength of about 70-160 ksi and an elongation of about 12-40%, although its strength is sufficient for 201018736 to meet the strength requirements of the golf iron head, but its elongation. Still not enough, resulting in a bad sense of hitting the ball, therefore, the S25C forged soft iron (both 75-85ksi tensile strength and about 30% elongation) is still the best material for making golf iron head, but its forging After the wealth # sex is not enough. In the past few decades, the iron-chromium-nickel alloy steel series has been extensively studied and discussed. Studies have shown that iron-chromium-nickel alloy steels can have high strength, high toughness, low temperature resistance, high temperature resistance, and wear resistance through different alloy designs. The main components are iron, chromium, and nickel. The addition of chromium can increase the oxidation resistance and resistance of the alloy, while the addition of nickel can stabilize the Worthite iron phase or Ma Tiansan in the alloy. Iron phase to improve the toughness of iron-based alloys; the basic classification of iron-chromium-nickel alloy steels is roughly as follows: (1) Vostian iron-based alloy steel: its microstructure is a fully centered cubic lattice (Face centered cubic Lattice, FCC) The structure, the basic composition is: 16-26wt% chromium, 8-25wt% recorded, 0-6wt% molybdenum, and 0.08wt% or less carbon, the typical mechanical properties range: tensile strength about 60-80ksi, The lodging strength is about 45-60 ksi and the elongation is about 40-60%. (2) Fertilizer iron alloy steel: its microstructure is Body centered cubic Lattice (BCC) structure, the basic composition is: 12-19wt ° / 〇 chromium, 0-5wt% recorded, 5wt Molybdenum below %, and carbon below 0.25 wt%, the typical mechanical properties range: tensile strength of about 60-1 OOksi, relief strength of about 45-80 ksi, elongation of about 20-30% ° (3) ferrite iron - Vostian Iron Alloy Steel: 201018736 Its microstructure is a face-centered cubic lattice (FCC) and a 20%-50% body-centered cubic lattice (BCC) two-phase structure, the basic composition is · 18-27% by weight of chromium, 4-7wt% nickel, 1-4wt% or less molybdenum, and 0.05wt% or less carbon; typical mechanical properties range: tensile strength about 100-120ksi, lodging strength -45-80ksi, elongation about 25-40 %. (4) Ma Tian scattered iron alloy steel: Its microstructure is Ma Tian scattered iron structure, the basic composition is: 11 -18wt. /. Chromium, 0-2 wt% nickel, 2 wt% or less molybdenum, and 0.17 wt% or less carbon, the typical mechanical properties range: tensile strength of about 150-200 ksi, relief strength of about 140-180 ksi, elongation of about 10- 15%. (5) Ma Tian loose iron-Worthfield iron alloy steel: its microstructure is a double phase structure of Ma Tian loose iron and 0%-20% Worth iron, the basic composition is: 12-18wt% of the network, 4-6wt% Nickel, molybdenum below 1-2 wt ° / 〇, and carbon of 0.10 wt % or less, typical mechanical properties range: tensile strength of about 120-160 ksi, relief strength of about 100-140 ksi, elongation of about 15-20%. On the whole, in the case of golf iron heads, under the limitation of fixed weight, it is mainly developed to seek materials with suitable mechanical strength, high toughness, high ductility, and excellent residual mechanical properties. The experience of golf club head manufacturing, the best elongation of the iron head alloy material should exceed 30%, and the higher the better; in addition, the tensile strength should be about 1.0-1.2 times that of forged soft iron (or 304 stainless steel) 1.1-1.3 times or so), that is, the tensile strength should reach 80-1 OOksi or more, and considering the variability and commercial value of the iron head design, it is also expected that the tensile strength of the alloy material can reach 6-4 titanium alloy. The strength, that is, the tensile strength reaches about 140ksi; in addition, the alloy material must pass the environmental test of 35±3°C and 5% NaCI (resistance to salt spray test) for 48-72 hours. If the above conditions are met, it can be produced. The best performance golf iron head or hollow iron head. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a composition alloy of a golf iron head having both high strength and high ductility. Thus, the alloy of the golf iron head of the present invention comprises 16.3-17.2% by weight of chromium, 5.8-6.5% by weight of nickel, 0.10-0.20% by weight of nitrogen, 0.01-0.10% by weight of carbon, 0.3-0.8\ /\^% of Shi Xi, and 0.3-1.0\^% fierce, the remaining ratio is iron. The effect of the present invention is that, by appropriately adjusting the nitrogen content, it is possible to form the iron head in the above-mentioned composition alloy, and in addition to having a basic granulated iron phase, it is possible to simultaneously assist the formation of the iron phase of the Vostian. The alloy composition is subjected to solution treatment at 950-1150 ° C / 0.5-2 hours without aging heat treatment. The formed iron head can have the microscopic microscope of Ma Tian loose iron and 10-30% Worth iron biphasic matrix. Structure and structure, with tensile strength of 130-145ksi, mechanical strength of 70-90ksi, elongation of 35-55%, and corrosion resistance with salt spray resistance test, and can effectively optimize the machinery Strength, ductility, rust resistance, and surface properties. The above and other technical contents, features and effects of the present invention will be apparent from the following detailed description of the two preferred embodiments of the accompanying drawings. Referring to Fig. 3, a first preferred embodiment of the alloy of the golf iron head of the present invention is shown in the alloy ratio of the composition numbers 1-4 in Fig. 3, and the numbers 13-16 are comparative examples, which is preferred. The examples are illustrated by the composition alloy ratio shown in the number 1 and include 16.53 wt% of chromium, 6.51 wt% of nickel, 0.16 wt% of nitrogen, 0.67 wt% of Shixia, and 0.78 wt% of manganese. The remaining proportion is iron. After the alloy composition is treated at 1000 °C for 1 hour, no aging treatment is required. The mechanical properties of the formed iron head are 75.72 ksi, tensile strength 132_15 ksi, and elongation 47.56%. And the iron head of the type 9 is tested by the salt spray test of 5% NaCl for 48 hours, and the golf ball shot of 3000 rounds. Further, please refer to FIG. 4, which is the iron rod formed in the preferred embodiment. The alloy material in the head casting obtained the structural gold phase diagram of the granulated iron and the 17% Vostian iron. The metallographic structure is the needle-like granulated iron structure and the massive Wolster iron biphasic structure, while Figure 5 (Fig. 5 a, b) and 6 (a, b) are the iron head castings respectively formed for the preferred embodiment Electron φ micrograph of the methadrite phase region and the Worthfield ferritic phase region obtained by the alloy material, Figs. 4, 5(a, b), 6(a, b) are mainly for demonstrating the preferred embodiment. The formed iron head casting does have the microstructure of the Ma Tian loose iron and the 10 - 30 % Wostian iron biphasic matrix; overall, the composition ratio of the alloy shown in No. 1-4 is 1000-1100°. After C solution heat treatment, the mechanical properties of the lodging strength is between 75.72-90.48ksi, the tensile strength is between 132.15-143.20ksi, the elongation is up to 38.77%-47.56%, and the resistance is 5% NaCl. The salt spray test was carried out for 48 hours and the golf ballots were tested in 3000 rounds. In contrast, the proportion of the composition alloy 9 201018736 shown in the comparative example No. 13 -16 shows that when the nitrogen content of the preferred embodiment is less than 0.1 wt% It is found that the elongation rate will be much lower than the minimum predetermined elongation (less than 35%) of the present invention, because the formation of the Worthfield iron phase will be less, so the nitrogen content can be appropriately adjusted. When the above alloy is formed into a golf iron head casting, in addition to In addition to maintaining high mechanical strength, the basic Ma Tian iron phase can help the formation of the Worthfield iron phase while increasing the elongation of the golf iron head; however, it is worth noting that if the nitrogen content is too much, it is greater than 0.25. When the wt% or more, the above-mentioned constituent alloy metallurgical chain will generate excessive gas, and brittle characteristics will occur. Therefore, in order to exhibit the performance of the optimized golf iron head, the nitrogen content of the constituent alloy of the present invention should be controlled at 0.1 Owt%. -0.20 wt%. Still referring to FIG. 3, a second preferred embodiment of the alloy of the golf iron head of the present invention is shown as the alloy ratio of the numbers 5-12 in FIG. 3, and the preferred embodiment is shown by the number 11. The compositional alloy ratio is illustrated, and includes 16.47 wt% of chromium, 5.60 wt% of nickel, 0.17 wt% of nitrogen, 0.57 wt% of Shixia, 0.64 wt% of fissure, 3.20 wt% of copper, and 0.276 wt%. % of titanium (Ti), niobium (Nb), vanadium (V), the balance is iron, the above composition of the alloy after 1 ° ° C solution treatment for 1 hour plus aging 600 ° C heat treatment, The mechanical properties of the formed golf iron head range are the relief strength of 72.54 ksi, the tensile strength of 122.31 ksi, the elongation rate of up to 50.31%, and the ball head is tested by the 5% NaCl anti-salt spray test for 48 hours and the golf ball shot for 3000 rounds. All are qualified; overall, the proportion of the alloys shown in No. 5-12 is 1固-11〇〇 °C solution treatment and aging 450-600 °C heat treatment, the mechanical properties range is the fall strength The tensile strength between 72.54-98.79ksi and 201018736 is between 122_31-152.39ksi and the elongation can reach 36.92%. -50.31%, and the 5% NaCl anti-salt test for 48 hours and the golf ballot for 3000 tests are all qualified, so this embodiment can achieve the same high strength and high ductility as the first embodiment. effect. It should be added that the following will separately explain the ratio range of various alloying elements and their influence on the properties of the alloy of the present invention: Chromium (Cr): chromium is added to the alloy of the present invention to contribute to the alloy composition. For the corrosion and oxidation resistance, and in order to make the alloy of the structure to control the microstructure of the Ma Tian loose iron Φ base and 10%-30% Worth iron, to demonstrate the performance of the optimized golf iron head, the present invention The chromium content of the constituent alloy should be controlled between 16.3% and 17.2% by weight. Nickel (Ni): nickel is added to the alloy of the present invention, mainly to control the microstructure of the alloy. When the nickel content is less than 5.5 wt%, the alloy phase of the alloy is less, so that The elongation is lower than the lowest predetermined elongation (35%) of the present invention; when the nickel content is more than 6.5 wt%, the iron phase of the Vostian alloy of the alloy is stabilized, but the mechanical strength is relatively lower than that of the present invention. Predetermined machine φ mechanical strength; therefore, in order to make the alloy in the production process easy to control the Ma Tian loose iron base and 10%-30% Worthite iron's dual phase matrix microstructure to show the optimization of golf balls The properties of the iron head, the nickel content of the constituent alloy of the present invention should be controlled between 5.8% and 6.5 wt%. Carbon (C): Carbon is basically an indispensable element of general steel materials. In addition to the formation of carbides or nitrides, it is also an element of the stable phase of the granulated iron. In the alloy of the present invention, when the carbon content When it is too high, carbides will form, which is unfavorable for the alloy's resistance to the surname. Therefore, the constituent alloy of the present invention defines carbon in an amount of from 0.01 to 0.1% by weight. 11 201018736 Nitrogen (N) · In the alloy of the present invention, the addition of nitrogen content is beneficial to the formation of the iron phase of the Vostian, relatively favorable for increasing the elongation of the alloy, when the nitrogen content is less than O.10 wt% , the iron phase of the alloy alloy is less, and the elongation is lower than the lowest predetermined elongation (35%) of the present invention; when the nitrogen content is more than 0.25 wt%, the alloy alloy is smelted. Excessive gas is generated and brittle characteristics occur, and therefore, in order to exhibit the performance of the optimized golf iron head, the nitrogen content of the constituent alloy of the present invention should be controlled between 0.10% and 0.20 wt.矽(Si): when ruthenium is added to the alloy of the present invention, it is advantageous for preventing the formation of pores, enhancing the shrinkage effect, and increasing the fluidity of the molten steel, thereby increasing the castability of the alloy casting, and therefore, the alloy of the present invention is The ability to add 0.3-0.8 wt% of niobium will help to improve the castability of alloy castings. Manganese (Mn): manganese usually coexists with iron. Since manganese is easily combined with sulfur, it can eliminate the harmful effects of sulfur on the hot brittleness of the alloy of the present invention; in addition, manganese can remove oxides in the constituent alloy; Manganese can also stabilize the granulated iron phase in the alloy. Therefore, if the composition alloy of the present invention can add 0.3-100% by weight of manganese, it will help to improve the castability and brittleness of the alloy casting. Copper (Cu): When the alloy of the present invention is added with copper, it is advantageous for the composition alloy to have resistance to atmospheric corrosion and to improve precipitation strength. Therefore, if the composition alloy of the present invention can add 2.8%-3.2% by weight of copper, it will contribute to Improve financial and mechanical properties. Titanium (Ti), sharp (Nb), and (V): when titanium, niobium and vanadium are added to the alloy of the present invention, the grain refinement and precipitation strengthening of the alloy can be obtained, and therefore, if the alloy of the present invention can Adding 0.15-0.5wt% titanium, sharp and hunger combination will help to improve the mechanical properties of alloy castings. 201018736 - In summary, the alloy of the golf iron head of the present invention is composed of 16 3-17 2wt〇/o of chromium, 5.8-6.5wt% of nickel, 0.10_0_20wt% of nitrogen, 〇.〇1 -0_10wt% carbon, 〇.3-〇.8wt% 矽, and 〇.3-l.〇wt% manganese, the remaining proportion is the composition of iron, after appropriate heat treatment conditions and adjust the nitrogen content, When the above-mentioned constituent alloy is formed into a golf iron head, in addition to obtaining the best strength of the granulated iron phase, it is possible to simultaneously assist in the formation of the Worthfield iron phase having the best ductility, thereby providing a shoal with iron and 10 -30% Vostian iron dual phase base & (matrix) microstructure group • woven 'with 13〇_i45ksi tensile strength, 70_90ksi drop strength, and 35-55 / 〇 elongation of high strength and Excellent mechanical properties of the high ductility combination. If the golf iron head is made of the alloy alloy with this mechanical property, the best requirements for the golf iron head or hollow iron head can be optimized to match the golf iron head. Designed to provide optimized mechanical strength, Malleable, rust and surface properties, in fact, to optimize the production of stainless steel head of a golf iron alloy, it can really achieve the object of the present invention. The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, that is, the simple equivalent changes and modifications made by the scope of the present invention and the description of the invention. All remain within the scope of the invention patent. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a mechanical property table illustrating the mechanical properties of a constituent alloy material of a conventional golf iron head; FIG. 2 is a mechanical property map illustrating an iron-based material of a conventional golf club head and the present invention a mechanical property distribution of the constituent alloys; 13 201018736 FIG. 3 is a comparison table showing a comparison of a first preferred embodiment, a second preferred embodiment, and a comparative example of the alloy of the golf iron head of the present invention; 4 is a metallographic diagram illustrating the metallographic structure of the golf iron head casting of the first preferred embodiment of the present invention; and FIG. 5(a) is an electron micrograph (bright field view) illustrating the first preferred embodiment of the present invention. An electron micrograph of the iron phase of the granule in the golf iron head casting of the embodiment; Fig. 5(b) is an electron micrograph ([111] zonal diffraction pattern), illustrating the first preferred embodiment FIG. 6( a ) is an electron micrograph (bright field view) illustrating an electron microscope image of the iron phase region of the Vostian in the first preferred embodiment; 6 ( b) is an electron micrograph ([001] selective diffraction diagram) illustrating an electron micrograph of the iron phase region of the Vostian in the first preferred embodiment. 14 201018736 [Main component symbol description] None
1515