Application of “soft canning” heat preservation technique in the superalloy forging process

The ＂soft canning＂ heat preservation technique is invented by Baoshan Iron ＆ Steel Co., Ltd. （Hereafter referred to Baosteel）, using the flexible insulation material which can be stuck on the surface of the heated ingot or billet in the superalloy thermal process. This adhesive insulation material can reduce the temperature drop of the ingot or billet during the transferring or hot working process, and can deform with the billet without dropping. The surface temperature drop can be effectively reduced, so the products can be obtained a good surface quality and the structural uniformity can be improved. The technique is applied to hard-wrought superalloy forging of cogging, superalloy rods finished forging fire and superalloy hot die forging processing,and good results have been achieved.

Preservation of Shellfish Undulate Venus (<i>Paphia undulate</i>) by Canning with Different Treatments

Our study investigated preservation Undulate venus (Paphia undulate) by canning via three treatments that are canned raw, canned smoked and canned cooked as a healthy product with high nutritional value. Results reported that edible meat of Paphia undulate was free from Cu, Pb and Cd as a result of washing process. There was significantly (p < 0.05) higher in moisture content of canned raw compared with other tow treatments of canned smoked and canned cooked of Paphia undulate, and there was significantly reduction of protein content (p < 0.05) in tow treatments of canned smoked and canned cooked compared with the canned raw. Significant different (p < 0.05) in fat content was canned raw < canned smoked < canned cooked. On the other side, the three treatments of canned shellfish Paphia undulate had significant difference (p < 0.05) in content of ash and carbohydrates content. Canned smoked of shellfish Paphia undulate showed the lowest value of pH. All treatments of canned shellfish Paphia undulate were rich in minerals where canned raw treatment was higher in Ca, Fe, Zn, Mg, and Mn. While canned smoked had minerals content lower than canned raw. Lightness (L*) had slightly difference between all treatments of canned shellfish Paphia undulate. Reduction on lightness and redness was noticed at the same time in all treatments of canned shellfish Paphia undulate, canned raw had the highest value of lightness (L*), and redness (a*). Canned smoked had the highest value of hardness followed by canned raw then canned cook. Slightly significant difference (p < 0.05) was noticed between three treatments in sensory properties, data showed that all panelists preferred canned cooked than raw canned and canned smoked, degree of canned cooked was excellent.

Assessment of pulmonary function using pixel indexes of multiple-slice spiral CT low-dose two-phase scanning in chronic obstructive pulmonary disease

Objective To explore the values of pixel indexes (PI) with multiple-slice spiral CT low-dose two-phase scanning for assessing the pulmonary function in chronic obstructive pulmonary disease(COPD) . Methods Thirty-six patients with COPD (COPD group) and 30 healthy people(control group) underwent

波音飞机OIL CANNING损伤研究

根据对波音飞机Oil Canning损伤处理的经验,并参考波音手册和相关文献资料的说明,对波音飞机Oil Canning损伤的成因、特征和修理进行深入研究,旨在使业界同行能够准确判断此损伤并采取正确合理的处理措施,保障航空安全,提高维修效率。

Thermal and structural studies of poly (vinyl alcohol) and hydroxypropyl cellulose blends

Polymers and polymeric composites have steadily reflected their importance in our daily life. Blending poly(vinyl alcohol) (PVA) with a potentially useful natural biopolymers such as hydroxypropyl cellulose (HPC) seems to be an interesting way of preparing a polymeric blends. In the present work, blends of PVA/HPC of compositions (100/0, 90/10, 75/25, 50/50, 25/75, and 0/100 wt/wt%) were prepared to be used as bioequivalent materials. Thermal analyses [differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA)], and X-ray diffraction (XRD) were employed to characterize and reveal the miscibility map and the structural properties of such blend system. The obtained results of the thermal analyses showed variations in the glass transition temperature (Tg) indicating the miscibility of the blend systems. Moreover, the changes in the melting temperature (Tm), shape and area were attributed to the different degrees of crystallinity and the existence of polymer-polymer interactions between PVA and HPC molecules. The X-ray diffraction (XRD) analysis showed broadening and sharpening of peaks at different HPC concentrations with PVA. This indicated changes in the crystallinity/amorphosity ratio, and also suggested that the miscibility between the amorphous components of homo-polymers PVA and HPC is possible. The results showed that HPC doped in PVA film can improve the thermal stability of the film under investigation, leading to interesting technological applications.

EXTRACTION OF THERMODYNAMIC PROPERTIES OF MINERALS FROM REVERSED EXPERIMENT DATA WITH INSI

All the methods in literature for extraction of thermodynamic properties of minerals from reversed experiment (REP) data neither completely meet the requirements of thermodynamics nor fully reflect the thermodynamic features of REP data. So there have been disputes about the thermodynamic validity of the methods. A method called interval-halving-scanning-