www.bewet.fora.pl

loczytzn

Thermal deformation of white cast iron carbide thermal fatigue behavior and the role of

And in the carbide or carbide and matrix interface exists on an analysis of secondary cracks that cleavage is carbides formed around the crack. Figure 4. Love of labor fracture surface in Figure 4 (40% deformation) 3.4 discussed by hand more brittle carbide. It is under the action of cyclic thermal stress easily broken, once the crack that is rapidly expanding. Thermal fatigue cracks can be seen carbide is the main initiation site and extended way. Therefore, the thermal fatigue resistance of the material depends on the form of carbide, size and distribution. 10% of the deformation of the basic eutectic carbides in the specimen to continuous network exists, once the crack, the crack will quickly along the carbide and the carbide and matrix interface extensions, so the thermal fatigue resistance is low. And 4O% and 50% deformation of the sample matrix in the eutectic carbides are broken for the isolation block, distribution is more dispersed, so that the continuity of the substrate to be protected, the stress on the carbide plays a 12-episode buffer, slowing the thermal fatigue crack initiation even if the crack, the crack extension measures carbide, because of the eutectic carbides into isolated blocks, if the crack extended from one block to the adjacent carbide carbide blocks, must pass through the substrate, and the toughness of the larger matrix, the matrix addition there is a small carbide particles, which greatly increased the crack propagation resistance ��so that crack propagation speed is reduced,[link widoczny dla zalogowanych], and in the a-N curve slope decreased. Therefore, the base more serious fragmentation of eutectic carbides, the better the thermal fatigue resistance. 4 Conclusion 4.1 Thermal deformation thermal fatigue cracks in cast iron carbide and carbon within the interface with the matrix along its initiation and expansion (heat treatment) 2000, No, 1 show, the fracture is brittle fracture special drive. 4.2 eutectic carbide morphology, size and distribution of thermal deformation of white cast iron thermal fatigue performance of the main factors. The more serious fragmentation of eutectic carbides, the smaller the size and distribution of the more dispersed,[link widoczny dla zalogowanych], the higher the thermal fatigue resistance. 4.3 The deformation of 40% to 50% of the white cast iron, the thermal fatigue resistance of high school love of Reference 1 Sun, white cast iron and microscopic mechanism of plastic processing, iron and steel 1994 (3j, 532 Xing Shuming Liu Jianhua, white cast iron Broken thermal deformation behavior of alkaline material, steel L995 (2): 58 ~ 603. Liu Jianhua, thermal deformation of the white cast iron carbide particles formed. Iron and Steel Research, 1998 (1): 27 ~ 294 Liu Jianhua, heat But after deformation} way to get white cast iron ring with the performance of shaggy, iron and steel of 1999 (2): 55 ~ 585. Cambodia Delin. perforator guides high temperature wear and thermal fatigue failure of education. Anhui Institute of Technology. I988 ( 2): 2016.JuddRR, strip hot rolling mill finishing machines group Tuan hard cast iron frame work of the first surface damage to the metal heat roll 1985. Suppl: 537. Feng is. high concentration carburizing and its properties, thermal process 1994 (6): l1 ~ ~ ~ ~ News and Information Industry Association, Shanghai, mold second meeting of the grand opening of the General Assembly in l999 the General Assembly on November 26 in Shanghai East China Hotel grand opening. The meeting was the first session of the Shanghai Model Association Council Vice Chairman and Secretary General Xu Yuanhong over the Assembly received Jiangxi, Anhui, Hubei, Tianjin, Sichuan, Fujian, Guangdong, Fuzhou, Beijing, Jiangsu, Hunan, Shandong, Nanjing, Yuyao and Huangyan l5 provinces and cities such as mold Union Science and Technology Commission of Shanghai,[link widoczny dla zalogowanych], and the district mold Society l2 sent a congratulatory message to the General Assembly, his message and greetings. at. Shanghai Model Association Deputy Secretary-General Liu Depp made on behalf of the first session of the Council entitled (enhanced services, to promote industrial development in Shanghai mold to meet the new challenges 2l century) report on the work. The report points -: five years,[link widoczny dla zalogowanych], the rapid development of Shanghai in the mold industry; the first session of the Council of the main work; work of the Council on the recommendations of the next three parts . At the same time, also made (on revising the Articles of Association) report. 228 representatives attending the meeting who have passed the conference report and the second session of the Council elected 103 members. Municipal Workers Union Secretary-General by Chih-Cheng Chen spoke at the meeting,[link widoczny dla zalogowanych], asked industry associations to standardize and legal management, and actively implement the State Economic and Trade Commission issued a 1016 document (to speed up the cultivation and development of industrial and commercial fields Opinions Association). Li to general aviation director, co-work mode assess and strengthen the work of the Association speech.'s Congress held in Shanghai after a council meeting of die Association second newsletter Shexian the original plan was held in April in the \copies, the situation here is difficult to hold up the meeting, I hope you offer advice, when conditions are ripe, the meeting be held as scheduled. From (Anhui heat Communications) 2000 1 <treatment) 2000No. A l3 1

相关的主题文章：

[link widoczny dla zalogowanych]

[link widoczny dla zalogowanych]

[link widoczny dla zalogowanych]