【正文】 rdance with the look in the mirror, dress up, wash bath, cure treatment, the general requirements of for the people pragmatic honest people as the theme, in carrying forward the spirit of Zhuanglang Zhuang, improve their work style, service to the masses of the people, the foundation of consolidating grassroots, promote transformation across efforts, to further implement the central eight regulations and The opposition party and government austerity waste regulations , double section provincial regulations, municipal provisions of the twelve plan and the implementation measures for on improving the work style of close ties with the masses law, highlight style building, carry out the whole wind spirit, resolutely oppose formalism, bureaucracy, hedonism and wasteful extravagance to solve the problems, Party members and cadres of the style and the masses of people strong, the Ministry of Party members and cadres to further improve their thinking and understanding, to further change the style of the wind, the masses to close, honest and pragmatic people honest image to further establish the foundation to further reinforce the basic level. Style of the building of the new results to promote the construction of a powerful force of the county and the ecological culture of the county and county educational practice activities of the unit is mainly: the county and below county departments under the organs, enterprises and institutions directly under the township, street, and munity, village, nonpublic economic organizations, social organizations and other grassroots organizations. Agencies and branches, each single unit, follow the rules on internal institutions. Educational practice with step by adhere to the county leadership, leadership and leading cadres to focus on outstanding catch to directly contact the service of the masses of law supervision departments and window units, service industry, educational practice, pay attention to grasp the heavy towns, streets and villages, munity education activities and the masses of grassroots groups in close contact to strengthen, and the majority of Party members, cadres and the mass line line Marx doctrine view of the masses and the party39。②通過查找資料充實、完善各項給定的設(shè)計內(nèi)容。主要參考文獻①夏立芳主編. 金屬熱處理工藝學. 哈爾濱: 哈爾濱工業(yè)大學出版社, 2005②中國機械工程學會熱處理分會．熱處理工程師手冊［Ｍ］．機械工業(yè)出版社．2003．第一版.③張玉庭主編．熱處理技師手冊［Ｍ］．機械工業(yè)出版社．2006．第一版④中國機械工程學會熱處理學會．熱處理手冊［Ｍ］．機械工業(yè)出版社．2003．第三版課程設(shè)計工作進度計劃第16周：對給定題目進行認真分析，查閱相關(guān)文獻資料，做好原始記錄。02科學實踐、調(diào)研7通過實驗、試驗、查閱文獻、深入生產(chǎn)實踐等渠道獲取與課程設(shè)計有關(guān)的材料。06設(shè)計（實驗）能力，方案的設(shè)計能力5能正確設(shè)計實驗方案，獨立進行裝置安裝、調(diào)試、操作等實驗工作，數(shù)據(jù)正確、可靠；研究思路清晰、完整。10設(shè)計說明書（論文）質(zhì)量30綜述簡練完整，有見解；立論正確，論述充分，結(jié)論嚴謹合理；實驗正確，分析處理科學。當這一類鋼含Mn或Si的量偏低，或模具零件尺寸較大時，必須水淬，否則達不到預期效果。熱處理工藝性良好，變形開裂傾向小，在100℃左右的熱油中淬火效果更好。當鋼錠有嚴重偏析時，應(yīng)在開坯時進行均勻化處理，在室式爐加熱時最好在650～700℃進行預熱，鋼錠開坯時允許最高加熱溫度是1150℃，大于1噸的鋼錠，可適當提高10～20℃，由坯成材時加熱溫度應(yīng)低些，一般不超過1130℃，終鍛溫度在開坯時應(yīng)大于850℃，而成材時應(yīng)大于800℃。 如為消除網(wǎng)狀碳化物(Cm)組織，除采用高溫正火方法外，當網(wǎng)狀碳化物（Cm）組織輕微時，也可適當提高溫度（10～20℃）的退火處理，但應(yīng)注意冷速要緩慢，保溫時間一般為2～4h。C，等溫時間4~5h，退火后的硬度185~229HB。C，油冷淬火，淬火后的硬度大致在61~64HRC范圍。當模具零件韌性不足時，易產(chǎn)生脆斷或開裂；當強度不足時，易產(chǎn)生塑性變形而失效。③咬合失效模具工作部分與被加工材料在高壓力摩擦作用下，潤滑膜破裂而發(fā)生咬合，即被加工材料“冷焊”到模具零件表面上，引起兩者表面質(zhì)量精度超差而導致的失效。例如，重載的冷擠壓模和冷鐓沖頭等易產(chǎn)生這種失效。②模具的韌性模具材料的韌性，要根據(jù)模具工作條件來決定，對于受強烈沖擊載荷的模具，如冷作模具的凸模、冷鐓模具等，因受沖擊載荷較大，需要高的韌性；對于一般工作條件下的冷作模具，通常受到的是小能量多次沖擊載荷的作用，模具的失效形式是疲勞斷裂，因此模具不必具有過高的沖擊韌度值。為了獲得高的強度，在模具制造過程中，要選擇合適的模具材料，并通過適當?shù)臒崽幚砉に噥磉_到要求。咬合抗力就是對發(fā)生“冷焊”的抵抗力。其中錳的質(zhì)量分數(shù)高達1．70％一2．00％，主要是為了提高鋼的淬透性。碳化物不均勻性一般較好，是最容易鍛造和機械加工的工模具鋼。碳化物不均勻性一般較好，是最容易鍛造和機械加工的工模具鋼。低合金刃具鋼一般為過共析鋼，鍛軋和鍛造成毛坯后，都要經(jīng)過球化退火的熱處理，以達到消除鍛造應(yīng)力、降低硬度、便于切削加工的目的，并提供了良好的碳化物球化組織。以上，主要應(yīng)用于改善工具被加工表面的粗糙程度?；鼗饻囟戎饕且罁?jù)鋼種和硬度要求而5定，同時還要依據(jù)刃具的性能要求及淬火情況調(diào)整回火溫度。在低溫回火過程中，馬氏體分解，殘余奧氏體部分轉(zhuǎn)變，使淬火鋼的內(nèi)應(yīng)力降低了很多，鋼的脆性也降低了，塑性和韌度提高了，從而使鋼獲得較好的綜合力學性能。 9Mn2V鋼去應(yīng)力退火工藝曲線 ③球化退火冷作模具鋼的球化