preform是什么意思

网络释义

用法例句

And in order to obtain SiC/Al composites reinforced with high volume fraction, double size distribution SiC powers with different size ratios were used to prepare the SiC preforms by self-oxidation bonding at low temperature, and Ferric Nitrate crystal was used for the first time in prepare the SiC preforms as pore-forming agents.

SiC粉体间的本征孔隙和Fe(NO_3)_3去除后留下的孔隙一起构成一个三维相互连通的、开放的孔隙网络;Fe(NO_3)_3去除在SiC预成型坯中留下的孔隙分布均匀,没有偏聚现象。

The design of preform and forging die is analyzed with the precautions and problems often observed during hog-forging.

本文以冲击块为例介绍了粉末冶金热锻的工艺,对热锻中的预成形坯设计、锻模设计作了进一步探讨,分析了热锻中的注意事项和经常出现的问题。

SiCp and binder were mixed together and SiCp preforms were prepared by warm pressing, thermaldebinding and pre-sintering.

在本实验中将SiC颗粒与粘结剂混合,温压制备成坯块,进行了热脱脂与预烧结,研究了热脱脂一预烧结后坯块的线性膨胀率、孔隙度、强度与工艺条件的关系,对预成形坯的显微组织形貌进行分析。

In the numerical simulation of parison formation, there are two main methods: one is to treat the polymer melt as a Newtonian fluid, the other is as a viscoelastic fluid.

型坯成型是塑料挤出吹塑中的一个重要阶段。

Parison formation is a critical stage in extr usion blow molding.

型坯成型是挤出吹塑中的一个重要阶段。

For the parison forming,a explanation aboutspecialized method and theory basis of numerical simulation adopted by researchersin China and abroad is given.

介绍了模拟技术在吹塑型坯成型中的研究和发展状况,对国内外学者针对型坯成型过程运用的数值分析方法和理论依据进行了论述,并着重介绍了神经网络方法。

For the parison forming, the explanation had been given about method and theory basis of numerical simulation adopted by researchers at civil and abroad, and the method of neural net was review empnatically.

介绍了模拟技术在吹塑型坯成型中的研究和发展状况 ,针对型坯成型过程 ,对国内外学者进行数值分析的方法和理论依据进行了论述 ,着重论述了神经网络方法。

Study on Near-net-shape Hot-pressing of Mg Extruded Preform

镁合金挤压预成形坯模压近终成型工艺研究

Microstructure Changes and Mechanism of Al alloy Pressureless Infiltration into Porous SiC Perform

Al合金无压熔渗多孔SiC预成形坯体的组织变化及机理

A Fundamental Study on Net-shape Hot-pressing of Mg Cast Perform;

镁合金预成形铸坯模压成形技术基础研究

PREDICTION OF NOOE SEPARATING FROM DLE IN TUBE AXIAL COMPRESSIVE PRECISION FORMING PROCESS

管轴压精密成形过程中管坯脱模点的预测

Mathematical Simulation of Billet Profile Growing Process and Structure Prediction during Spray Forming Process;

喷射成形沉积坯生长过程数值模拟和组织预测

wheel forging press

车轮坯成形模锻压力机

Research on blank shape and drawing process of asymmetric box part

非对称盒形工件拉深毛坯与成形设计

Causes and Preventing Measures of the Slab Caster Center Segregation

连铸板坯中心偏析的成因及预防措施

hat body, of wool felt, neither blocked to shape nor with made brims

羊毛毡帽坯,未制模成形也无特制帽檐

hat body, of fur felt, neither blocked to shape nor with made brims

绒毛毡帽坯,未制模成形也无特制帽檐

Formation and Control of Oscillation Mark for 304 Stainless Steel Continuous Casting Slab

304不锈钢连铸板坯振痕形成及控制

Study on the Shape Evolution and Heat Transfer of the Rodbillet during Spray Forming Process;

喷射成形柱状坯生长及传热过程研究

Rod Forgeable Piece Numerical Simulation and Optimization of Stock;

连杆锻件成形的数值模拟及坯料优化

On the Metal Volume Shaping of the Technology of Metal Mould Casting;

金属制坯技术中的金属体积成形工艺

Intelligent Control for Forming Process of Cylindrical Spray Deposition

柱状喷射沉积坯成形过程的智能控制

The Simulation of Heat Transfer of the Rod-billet during Two-nozzle Spray Forming Process

双喷嘴喷射成形柱状坯传热过程模拟

Research on local upsetting finish forging process of valve blank

气门毛坯局部镦挤终锻成形工艺研究

Mechanism of Crack Formation During Continuous Casting of Peritectic Steel Slabs

包晶钢铸坯裂纹形成机理的实验研究