Effect of Al3Ti4B Refiner and Al10Sr Modifier on Microstructure of ZL107 Alloy

Effect of 13148 Refiner and 03 Modifier on Microstructure of Alloy 1 Li Jianguo Zhang Boqing Ma Hongtao Fang Hongsheng Ma Xiaohua (Department of Materials Science and Engineering, Tsinghua University, Beijing 100084);2. State Key Laboratory of Tribology, Tsinghua University, Beijing 1000,0 Abstract The effect of the 13148 refiner and the 081 modificator on the microstructure of 2107 alloy was studied. As a result, when the addition amount of the refiner 131 was more than 0.6, the 7107 alloy could obtain about 1001201 equiaxed dendrites. And its resistance to recession is at least not less than 240,1. However, it has no metamorphism on eutectic silicon; while the quantitative human 081 modifier has not only made eutectic silicon fully degraded in at least 240,1, but also on the first birth of a crystal. The particles have a definite refining effect; when the 13148 refiner and the human 081 modifier act together on the 2,07 alloy. The effective metamorphic time of person 1 is greatly reduced. Grain has grown up. But when the two match at the right amount. Similar or identical refined refinements can be obtained as compared to single addition.

The key is such as: From the north to the refinement, the pool changes to a few 107. Micro-organization; refinement. Shaoyan K43fITun document identification code 1 generation old alloy refinement. Deterioration processing has historically been a focus of attention in the research and production sectors. In the long term, not only in China but also in industrialized countries, most of them use the method of refining aluminum alloys. Practice has proved that no matter whether the intermediate alloy such as a few 6 151 1 D busy or the salt containing 8, 21 is directly added in the melt, it can not significantly refine the grain.

In 1981 and other 5 first discovered into the 148 master alloy and hypoeutectic also 2 in the research, the basis of the development of 13 D 38 alloy. The depositors have made relevant researches on this. 312. Since there are still technical difficulties in the mass production of 0138 alloy in industry at present, the 0138 refiner has not been widely applied to industrial production at home and abroad. . Therefore, the report on the specific effects of the new refiner and the long-lasting metamorphic agent 151 commonly used in industry on the human 1 series alloy was reported by the author of the wooden article. The ability to mass produce refiner 13148 grain refiner and man 131. The modificator works together on the 17 alloy to study the deduction and deterioration of the buckle phenomenon; 1 experimental method score, employing 1203 The crucible melting in the resistance furnace, respectively or the same, adding a different amount of 348 纟 1 agent and, 31 may wish to be different, and in 725, stay temperature after different time pouring. Casting mold for cast iron, sample size is 4 to 3, along the cross-section of the sample between the silver open, and the sawing face as the observation surface to prepare two metallographic samples, one of the as-cast samples after solution heat treatment 515 ± 5, insulation 6. Observe the gold microscopic structure along the SEM. Its low magnification uses reversal film imaging technology.

2 Results of the analysis without refinement and modification of the 207 alloy microstructure, its primary 1 dendritic developed orientation of strong grain size of 2000 3000 or so, eutectic silicon phase curved panels and strips, 13 and. When adding more than 0.6 to the 7107 alloy body, the 148 refiner and incubating for different periods of time, the primary 1 is significantly refined, and has no orientation, and the grain size is about 1001. However, the refinement of the primary phase did not fundamentally change the morphology of the 3 phase of the eutectic group. Compared with 1, the eutectic silicon still retains the curved panel-like characteristics except that it has more slender and concave angles. The characteristics are now 3 in the subsequent solution treatment; the phases are fractured and grained, but most of them become thin rods.

15,1 of the microstructure. When the incubation time was extended to 24,1, the tissue morphology was still similar. When the 207 alloy melt 1 fund project nine key science and technology projects in the country 90,040 alone added 0.6 people 031. And after insulation 12,1, then the eutectic silicon phase is highly branched after metamorphism, pine-like dendrites, 1. When the heat is kept small, the eutectic crucible is still fully degraded when (1); after the solution treatment, the silicon phase is finely rounded and the granular parameter is behind 400. In addition, compared with 1, the first-person phase is also With a certain degree of refinement, the macroscopic grain size is about 60,700, which is called 1. This shows that the quantitative person also has a refinement effect on the grain of the 2-port 7 alloy. This is due to the fact that for 13 Yuan, there is a eutectic reaction, and the eutectic reaction temperature is higher than that of the 2107 alloy liquidus. This is similar to the human element phase, so when adding a quantitative 3 energy refinement hypoeutectic alloy Grain.

IUUJflijJPW! Tree-shaped, 23 and. This tissue is very similar to the heart after the solution treatment.

When the Baoshan 60 Mountains were burned and cast, the grain size was basically unchanged compared with the heat preservation 15 Shan 1, but the degree of eutectic Si branching slightly decreased to 3 in the solid solution at the silicon phase. The inch is slightly larger. If the medium size boat 19, the grain size is still unchanged, but this time the eutectic silicon is converted back to a strip-like structure, most of which are short rods, such as the following four. After incubation of the above-mentioned cultures with 120 seeds, the tissue was still very similar to 2,3,1.

The metamorphic agent had an effective metamorphic time, but the refinement effect of the human 0148 was less affected by 03; within the experimental time range, by adding alone, at least 1 of 6 had a sufficient metamorphic efficiency of 24,1. Similarly, after adding people into 05 and 1343, at the temperature of 7107 alloy iron body, under the temperature of 13141 refining agent, 13 dissolved into dissolved and 13 of the modified agent were decomposed and dissolved. 62, the melting point of the compound is about 2500, the mass ratio of 3 to 8 is 1.35, that is, the consumption of 51 is always greater than the loss of insulation in the melt during heat preservation, but this loss may be more than that of 3 out of 6 The loss caused is much smaller. 51 in the melt in the free form of metamorphism, when the holding time is short, due to a small loss of burning, there are still enough free state in the melt 31 to 31 fully metamorphic effect. In fact, the minimum number of 51 required to be allowed to degenerate is less, but after introducing 13148 people, it is necessary not only to increase 5; in the short term, it is fully degraded and the minimum required amount is 51. It is basically sufficient to increase the content of 1 and 3, and to ensure sufficient metamorphic efficiency when the holding time is short. Also, since there are few people to join, there are still enough refinements 5, and the grain size changes. Not much, at 71:1, the mountain 15 increased to 9,1.

Due to the gradual burning of 1. The 5-phase metamorphic effect gradually weakened. In this process, 131 immortalizers have good anti-recession performance. Pay several 107 alloys. When the towel. By adding 6 to 1.614, a uniform grain of about 1001 can be obtained. Although the person 1771 has an influence on the 13148 refinement performance, when the amount of 131 people is small, the influence is not obvious.

If 12 is to ensure that the full metamorphism efficiency increases to 14 content, the phase can be fully metamorphosed, but the number of alloying pinholes also rapidly increases, which is undesirable, so increasing the 131 content of humans is not the preferred route. It can be considered to reduce the amount of added human 48 by 48 and increase the amount of residual free 31 by a relative amount. For example, keeping the decrease to 0.8 and 0.6 does not change the dendritic size of the human at this time. The degree of deterioration of He eutectic silicon has improved, such as the Court 2.

In order to ensure the full metamorphism of the melt 120,1, and to ensure that the melt has a full metamorphism effect of 120,1, it is necessary to increase the use of the mutator =31 and the hawthorn in the melt while adding 1.0 people 051. and 0.6 people 13148 and keep warm 12, after the introduction of gold from micro-weaving, compared with Court 3. The communite product is much more densely divided. The size and distribution of the silicon phase after the solution treatment of the alloy is very similar to that of the case 41.

After solution treatment, eutectic silicon will undergo different degrees of fracture and spheroidization. The typical organization is divided into the following 4; Huan, 3 conclusion gold is refined to about 1 equiaxed grains, but can not make the eutectic crush become Meng.

The quantitative human modifier 03 not only makes the eutectic silicon fully deteriorated over a long period of time. In addition, the 107 grains can be refined to 600 to the gold melt. 01. The effective and sufficient metamorphic period is greatly shortened and the grains have grown up. , 51 闱忭 amount of 1 added, depending on the melt holding time, on the other hand depends on the amount of 13148 added; if you want to ensure the best refinement effect of 12,1, then the best addition is 6 people 13146 And 1.0 people 05 IQ Shizhou; Wang Li, SUNYfmin Sun Yimin, BIAN, 3 Yanbian Xiufang, the refinement of this hypoeutectic person 1 alloy. Shi Shi 10, 1 dozen claws 8 Renshan 78 special casting and non-ferrous alloys, 1998518.

10 Hua Ru, Liao Hengcheng, Ren; Duan 1; 3 Fang Xinxian 31, 14, Sun Guoxiong. Casting alloy melt processing grain refinement 1.33, 1 such as special casting and non-ferrous alloys, 1999 SUNYimin Sun Yimin. Boron refinement of hypoeutectic APSi alloys. We took off on 01 and 8 percent of the 1 Chinese Journal of Nonferrous Metals, 199 poor 94,714.

Long Huazhong