帮忙看一下92和93题,给出讲解
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发布时间：2022-05-10 15:52
共2个回答
热心网友
时间：2023-10-14 12:52
婀, it essentially reflects the changes in the microstructure changes. Hardness This method is simple and practical test, you can roughly determine the strength of welded joints. In general,franklin marshall outlet, areas of high hardness, high strength, wear resistance, but the ctility, toughness is low. Hardness of the specimen tested to interface a matrix deposited a layer of the order,ralph lauren danmark, this order at intervals along the O. 5mnl intervals hardness test, the sample deposited metal hardness distribution shown in Figure 4, Figure 5. √. A distance of base metal cladding layer 246 810 l / mm Figure 4 test Cheung 1,tory burch uk, 2 Xiang test the hardness distribution of Fig. 4Micro-hardnessprordeofsample1and2 Figure 4 for the sample 1 and sample 2 of the micro-hardness distribution of sample 1, the average hardness of HV355 surfacing layer, while the cladding layer of sample 2 is about the average hardness of HV379. Sample 1 minimum heat affected zone hardness values ??than the base metal hardness is about to lower HV55; and sample 2 the hardness of heat affected zone and base metal hardness values ??of the basic values ??quite. As the soft base material melting people, both the fusion zone hardness values ??have increased faster than, but sample 2 in the outermost cladding layer hardness value decreased. Figure 5 is a sample 3 and sample 4 of the micro-hardness distribution of sample 3,abercrombie copenhagen, the average hardness of HV368 surfacing around, but the sample 4, such as welding, such as ∞ ∞ ∞ d ∞ carp as 0,443,322 people H the more long indole proction and application of Pan Quanxi, etc.: CHR electrode surfacing metal microstructure and microhardness analysis of the first 11> } Ocean 3 sample trend 4 /, l, § ◇ base metal heat affected zone melting cladding layer deposited metal by the base material of the relatively smaller than the first layer, with higher levels of C, Cr, Mo and C to form carbides,franklin and marshall, dissolved in the formation of hard phases in the austenite grain refinement, increased hardness , can reflect the characteristics of the deposited metal, the hardness change is not great. Deposited in two layers of metal, the first layer of deposited metal hardness than the second layer of deposited metal of high hardness, because the welding time is equivalent to the second floor of the first layer of weld metal made a normalizing processing, the organization is more refined, hard carbide phase distributed more evenly, so that the first layer of deposited metal hardness by ~ 1] t5-material dilution of greater impact, the first layer of deposited metal mainly by the organization martensite,abercrombie k?benhavn, ferrite components, and contains a small amount of resial austenite, carbide second layer of base metal dilution by the impact of small, surfacing electrode can basically reflect the performance of the deposited metal itself, the second layer of deposited metal to tissue is mainly martensite and ferrite containing a small amount of resial austenite, the first layer of weld metal with different that there is a granular nite, pearlite and a small amount of sorbite organization (2) the metal cladding layer microstructure, microhardness and energy of the welding line welding line the greater the energy, the formation of the metal structure of the The higher the hardness. but also with the organization type of hard phase, performance and other relevant distribution is uniform (3) does not appear in the weld joints crack. weld test prior to a warm plate and rece the restraint stress References: [l] Juan surfacing and thermal spray [M1. Beijing: Chemical Instry Press, 2004 [2] fresh Yuqiang, Zhou Yingjun. welding process parameters on weld quality and alloys of transition impact lJ]. Chongqing Architecture University, 1999,ed hardy kl?der,21 f3) ,78-81. [3] Sichuan Atlantic Welding Materials Co., Ltd. of the Atlantic Welding [M]. Sichuan: Atlantic Welding Materials Co., Ltd., 2003 [4] Chen Rd. engineering welding technology and quality assessment standard test for detection of Practical Manual [M] Beijing: Beijing Publishing Center Electronic Publications, 2003 [5] Chinese Mechanical Engineering Society Institute of Welding Welding microstructure map Instry Press, l987. [6], Shanghai Institute of Machinery Manufacturing Technology. metallographic analysis IM]. Shanghai: Shanghai Science and Technology Literature Publishing House, 1987. [7] Yin Jinshi. basics of welding materials and practical [M1 Beijing: Chemical Instry Press, 2004. [8] Yin Jinshi,ed hardy udsalg, Torr Zheng Lin, Zhang Xiaomu,ralph lauren outlet, etc. control the performance of welded joints and application [M] Beijing: Ordnance Instry Press, 1992 [9] KMB text of Mechanical Engineering Materials [M ],abercrombie paris, Beijing: Mechanical Instry Press, 2002. [l0] Jiang Xishan. microstructure of special steel profiles [M], Beijing: Mechanical Instry Press, 2003. [l1] Xuyong Jing, Chen Li. Cr-Mo-V surfacing alloy composition and performance of their organizations [JI_ welding equipment and materials, 2003, 32 (3), 39-41. Bo Bo Shan Hu as Lake Gaga
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热心网友
时间：2023-10-14 12:53
在这里，vegetables泛指蔬菜，不可数（从前面一句可以看出来）
92、A
fill up 装满追问请问it可指代不可数名词?那that为什莫不可以
追答93 A
