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铸件精度    
相关语句
  casting accuracy
    Measurement of the casting accuracy indicated that the casting accuracy of the test group was higher than the control group.
    而各组蜡型的边缘适合度无显著性差异(P>0.05)。 为去除蜡型制作对铸件精度的影响,而求得的铸件和蜡型边缘适合度的差值,即铸造精度值。
短句来源
  casting precision
    The quantitative relationship between the precision of titanium repair articles and the investment expansion was defined by combining the investment's expansion test with dentistry casting precision test.
    将国内外铸钛专用包埋料的膨胀试验与牙科铸件精度试验结合起来 ,确定牙科铸钛修复体的精度与铸钛专用包埋料的膨胀量之间的定量关系 .
短句来源
  precision of casting
    Objective To study the compressive strength of foaming gypsum bonded investment and the permeability of the casting, in order to increase the precision of casting .
    目的 测定发泡石膏外包埋材料抗压强度及铸型的透气性 ,以便提高铸件组织的致密性和铸件精度
短句来源
  casting precision
    The quantitative relationship between the precision of titanium repair articles and the investment expansion was defined by combining the investment's expansion test with dentistry casting precision test.
    将国内外铸钛专用包埋料的膨胀试验与牙科铸件精度试验结合起来 ,确定牙科铸钛修复体的精度与铸钛专用包埋料的膨胀量之间的定量关系 .
短句来源
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  casting precision
The new fabricating process showed several advantages over the traditional process in increasing toughness, better casting precision, elimination of the annealing treatment stage and raising production efficiency.
      
  casting precision
The new fabricating process showed several advantages over the traditional process in increasing toughness, better casting precision, elimination of the annealing treatment stage and raising production efficiency.
      


Good fitness of osseointegrated frameworks was a key factor to protect implant for function. The purpose of this study was to evaluate the fitness of anterior implant fixed bridge in one piece casting made of Ni Cr alloy in different numbers of fixture abutments. The specimens were measured by the three dimensional measurement system (German Opton uMM550). The results demonstrated that there were statistically significant differences in dimensional changes among one, two or three fixture numbers, the space...

Good fitness of osseointegrated frameworks was a key factor to protect implant for function. The purpose of this study was to evaluate the fitness of anterior implant fixed bridge in one piece casting made of Ni Cr alloy in different numbers of fixture abutments. The specimens were measured by the three dimensional measurement system (German Opton uMM550). The results demonstrated that there were statistically significant differences in dimensional changes among one, two or three fixture numbers, the space of retention was 50~150μm, and the flow of retention was 100~250μm.

为探讨前牙 32 1缺失中不同种植基桩数目对 Ni- Cr合金种植固定桥桥支架适合性的影响 ,采用三维坐标测量法 ,对 3组分别含有 1、2、3个种植基桩的五单位双端固定桥试件进行测量。结果显示选择不同的种植基桩数目对同一长度的铸件的精度有差别 ,含 2个基桩的试件精度最高。固位体的理论边缘间隙值在 5 0~ 1 5 0μm,理论浮升量在 1 0 0~ 2 5 0 μm。

Objective To study the compressive strength of foaming gypsum bonded investment and the permeability of the casting, in order to increase the precision of casting .Methods Refer to the traditional gypsum bonded investment, added with different foaming dosage to determine the compressive strength of the investment material ,selected the bast prescription which can support casting compression and pounding strength to determine permeability of casting mold and the amount of pores under the observation of metal...

Objective To study the compressive strength of foaming gypsum bonded investment and the permeability of the casting, in order to increase the precision of casting .Methods Refer to the traditional gypsum bonded investment, added with different foaming dosage to determine the compressive strength of the investment material ,selected the bast prescription which can support casting compression and pounding strength to determine permeability of casting mold and the amount of pores under the observation of metal scope . Results When the foaming was 0.025g/100ml,the compressive strength of the casting mold and the permeability was the best ,the component of casting mold was tightly arranged under the observation of metal scope; the amount and size of pores were obviously less .Conclusion Casting which using the foaming gypsum bonded investment material is better than that one which using the traditional investment material.

目的 测定发泡石膏外包埋材料抗压强度及铸型的透气性 ,以便提高铸件组织的致密性和铸件精度。方法 在石膏内加入不同剂量的发泡剂 ,筛选抗冲击力强、发泡增值量适当的一种发泡石膏配方。并以常规石膏系外包埋料 (石膏和石英 ) [1] 作为对照组 ,同时对试验组和对照组的铸型透气性进行测定以及两种铸件金相组织气孔含量分级对照。结果 在选用发泡剂含量 0 .0 2 5g/ 1 0 0mL水时 ,其发泡外包埋材料抗压强度理想 ,并可提高铸模的透气性。透气均值由 0 .0 0 1 5cm3 /标准大气压 .min增加到 0 .0 0 34cm3 /标准大气压 .min。因包埋材料透气性增加 ,铸件在金相显微镜下可见其组织结构排列致密、气孔数量及直径明显少和小于用普通包埋料的铸件。按合金气孔含量分级标准可由Ⅲ级降低到Ⅰ级。结论 发泡外包埋材料相对常规包埋材料所得铸件其组织更致密

Objective: To evaluate the effect of chemical polishing on accuracy and mechanical properties of titanium castings. Methods: Three groups of plate casting which included two groups of pure titanium casting and one group of Co-Cr alloy casting with 5 castings each were involved. Machine-grinding, chemical polishing, and electrolytic-polishing were used in three groups respectively. The weight of each casting was measured, and weight loss ( - wt% ) was calculated before and after polished. There were two groups...

Objective: To evaluate the effect of chemical polishing on accuracy and mechanical properties of titanium castings. Methods: Three groups of plate casting which included two groups of pure titanium casting and one group of Co-Cr alloy casting with 5 castings each were involved. Machine-grinding, chemical polishing, and electrolytic-polishing were used in three groups respectively. The weight of each casting was measured, and weight loss ( - wt% ) was calculated before and after polished. There were two groups of samples in tensile test. The tensile strength, yield strength, and elongation rate in control and chemical polishing groups were measured. Results: The weight loss of the titanium casting polished by chemical method was higher than that polished by machine-grinding method, and there was no significant difference compared with Co-Cr alloy casting. There was no sighnificant difference in mechanical properties between control group and test group. Conclusion: The chemical polishing of titanium has a clinical applying value, and is worth of spread.

目的:研究化学抛光对纯钛义齿铸件的精度和机械性能的影响。方法:对3组板状铸件(2组纯钛铸件和1组钴铬合金铸件)分别用常规手工研磨抛光、化学抛光和电解抛光三种不同方法处理,用电光分析天平分别测定每个铸件抛光前后的重量,并计算出减重率。机械拉伸试件共两组,每组6个。对照组试件不作任何处理,实验组试件予以化学抛光。在Dss-25T型电子万能试验机上作拉伸试验,记录抗拉强度、屈服强度和延伸率。结果:化学抛光组铸件的减重率大于手工研磨抛光组,但与电解抛光组无显著性差别。化学抛光组和对照组的机械性能测试结果无显著性差别(P>0.05)。结论:纯钛铸件的化学抛光法具有临床应用和推广价值。

 
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