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="ChDivSummary" name="ChDivSummary">Fracture toughness determines materials’ resistance to fracture, which is measured often using impact or bending tests. However, it is difficult to evaluate fracture...Potential application of electron work function in analyzing fracture toughness of materialsHao Lu1,Chenxin Ouyang1,2,Xianguo Yan3,Jian Wang1,3,Guomin Hua1,D.Y.Li11. Department of Chemical......
硼对V-N微合金钢热影响区组织和性能的影响薛东妹1,许文文2,潘涛1,苏航2,王青峰0(1.北京市钢铁研究总院结构材料研究所2.燕山大学 亚稳材料科学与技术国家重点室,河北秦皇岛 066004)摘 要:研究了硼氮复合添加(210×10-6N+17×10-6B)和典型增氮(120×10-6N)的V-N微合金钢粗晶热影响区(CGHAZ)中组织和性能随冷却速度(t8/5)的变化规律.研究结果表明:在V-N微合金钢中添加微量硼时,各t8/5下的CGHAZ中均可通过抑制先共析铁素体的转变,促进针状铁素体和粒状贝氏体的形成......
焊接热循环对07MnCrMoVR钢热影响区组织及韧性的影响许良红1,陈延清1,章军1,曾宇波2,王剑2(1.北京市首钢技术研究院用户技术研究所2.中国水电八局制安分局,湖南长沙 410007)摘 要:为深入分析07MnCrMoVR钢热影响区的脆化问题,采用热模拟技术和显微观察技术,对该钢热影响区的组织和性能进行了深入研究.研究结果表明:单次热循环时,粗晶区(CGHAZ)和临界区(ICHAZ)韧性恶化严重,晶粒长大及粒状贝氏体,M-A组元等非平衡组织的形成是粗晶区韧性恶化的主要原因.随着t8/5的增加,粗晶区冲击......
铌对00Cr12Ni不锈钢组织和性能的影响陈旭1,2,郑淮北1,叶晓宁2,姜传海3,江来珠2(1.上海市宝山钢铁股份有限公司研究院2.上海市上海交通大学材料科学与工程学院3.上海交通大学 材科科学与工程学院,上海 200030)摘 要:分别冶炼了3种不同铌含量的00Cr12Ni不锈钢,用光学显微镜和透射电镜观察了热轧退火态的显微组织,测量了试验钢的拉伸性能和不同温度的冲击功.试验结果表明:铌的添加显著抑制了退火时铁素体再结晶的发生.未添加稳定化元素铌的钢中析出相为Cr23C6,w(Nb)为0.28%的试验钢中析......
Kai, DAI Sheng-long. The impact toughness of Al-Cu casting alloy[J]. Material Science and Technology, 1999, 7(S1): 245?247. [10] LI Z, SAMUEL A M, SAMUEL F H, RAVINDRAN C, DOTY H W, VALTIERRA S...图分类号:TG 174.443 文献标识码:A Microstructure and impact properties of slow injection A356 die castings with partial squeeze BAI Yan-fei, ZHAO Hai-dong, LI Yuan-yuan, KANG Zhi-xin......
Effect of Rare Earth Elements on the Impact Wear Resistance of Nitrocarburizing Layers陆明炯,刘家浚摘 要:<正> In this paper the effect of rare earth elements on the toughness and impact wear resistance of nitrocarburiz-ing layers is studied.The experimental results show that the toughness and impact wear resistance ofRE-nitrocarburizing layers......
study,the effect of aging heat treatment at 650,750,and 850?C on the impact toughness of 316L austenitic stainless steel,2205 duplex stainless steel and their weldments has been investigated.Welding... of investigated materials.Aging treatment resulted in degradation in the impact toughness as demonstrated by the reduction in the impact fracture energy and deformation parameters(strain hardening......
="ChDivSummary">Prior austenite grain size dependence of the low temperature impact toughness has been addressed in the bainitic weld metals by in situ observations.Usually,decreasing the grain size is the only approach by which both the strength and the toughness of a steel are increased.However,low carbon bainitic steel with small grain size shows a weakening of the low temperature impact toughness......
TMCP工艺在高强度船板生产中的研究与应用孙宪进1,徐洪庆1,李旺生1,赵坤1,李成军1(1.山东省济南市济钢集团有限公司)摘 要:利用热模拟试验机对高强度船板的静态再结晶和动态转变行为进行了研究,分析了主要工艺参数对钢板组织性能的影响,开发出一系列TMCP型高强度船板.这种船板平均组织晶粒度可达到11~13级,具有优良的低温冲击韧性和焊接性能. 关键词:高强度船板； TMCP； 工艺参数； 低温冲击韧性； 焊接性能......
高铌X80管线钢焊接粗晶区组织和性能研究焦兰1,2,刘清友2,孙新军2,贾书君2,宋宁-2,林鹏2(1.云南省昆明市昆明理工大学冶金与能源工程学院2.北京市钢铁研究总院结构所)摘 要:采用焊接热模拟技术对高铌X80管线钢进行了热模拟试验,研究了在不同焊接热模拟工艺下贝氏体组织的转变及冲击韧性的变化.结果表明:在不同的焊接热循环条件下,焊接粗晶区组织主要是板条贝氏体和粒状贝氏体.冷却时间t8/5为10 s时,适量的粒状贝氏体起到了分割板条贝氏体的作用,且MA岛的数量较少,呈粒状均匀分布于奥氏体内,使得冲击韧性达到......
