• attaining both small stratification and high performance is possible

... corrosion resistance, and weldability These steels can be further divided into subgroups: • Carbon steels • High-strength low-alloy (HSLA) steels • Quenched and tempered (QT) steels • Heat-treatable ... When the CE of a steel is less than 0.45 wt%, weld cracking is unlikely, and no heat treatment is required When the CE is between 0.45 and 0.60 wt%, weld cracking is likely, and preheat in the range ... °C, (200 to 750 °F) is generally recommended When the CE of a steel is greater than 0.60 wt%, there is a high Trang 12probability that the weld will crack and that both preheat and postweld heat

Ngày tải lên: 13/08/2014, 05:21

... between hardened and nonhardened areas) References cited in this section 82 G.F Vander Voort, Failures of Tools and Dies, in Failure Analysis and Prevention, Vol 11, 9th ed., Metals Handbook, American ... (where analysis could be performed immediately at a remote site) to hand-held packages capable of data acquisition and analysis on board the test vehicle in real time Microelectronics is further ... and arsenic as low as possible Subsequent impact testing of coupons from the forgings is used to verify the initial toughness Such information is compared to specification requirements and historical

Ngày tải lên: 13/08/2014, 05:21

... hot-work steels Trang 9H10 Medium Deep Very low Highest 39-56 Medium to high high Very high High Medium high Very high High Medium high Very high High Medium Tungsten hot-work steels medium ... high Medium Medium High High-carbon, high-chromium, cold-work steels high Trang 11D4 Medium Deep Lowest Highest 54-61 Low Low High Very high high Oil-hardening cold-work steels O7 High ... very low; W, high W, low; O, very high Shock-resisting steels high Highest Low Low to medium high Highest Low Low to medium Trang 12S7 Medium Deep A, lowest; O, low O, high; A, highest 45-57

Ngày tải lên: 13/08/2014, 05:21

... intended cleaning procedures • Stability of properties in service • Toughness • Resistance to abrasion and erosion • Resistance to galling and seizing • Surface finish and/or reflectivity to ... includes: • Corrosion resistance • Resistance to oxidation and sulfidation • Strength and ductility at ambient and service temperatures • Suitability for intended fabrication techniques • Suitability ... processes of manufacture Type 316 is more resistant and is generally used for storing and manufacture if the fluorine content is not too high Type 317 is somewhat more resistant than type 316 At concentrations

Ngày tải lên: 13/08/2014, 05:21

... corrosion and pitting resistance compared to the CF-8 and CF-3 alloys The CF-8M and CF-3M alloys have good resistance to such corrosive media as sulfurous and acetic acids and are more resistant ... 2.2 HN Very high strength at high temperatures; resistant to oxidizing and reducing flue gases 1040 1900 11 1.6 HP Resistant to both oxidizing and carburizing atmospheres at high temperatures ... temperatures where carbon diffusion is rapid (such as above 1200 °C) and then rapidly cooling, a high and uniform carbon content is established, and up to about 0.20% C is retained in the austenite

Ngày tải lên: 13/08/2014, 05:21

... in this article, unless otherwise stated. Introduction Cetirizine (CTZ, Fig. 1a); is non-sedating antihistamine with long acting activity for treatment of urticarial and rhinitis [1] It is ([2-[4-[(4-chlorophenyl) ... determination of both CTZ and PPA [5 6]; our proposed HPLC method is superior to the both mentioned meth-ods Despite Sunil et  al [5] provides an HPLC method for application in plasma and urine, it is less ... = 0.9999) for NMS where: P is the peak area, C is the concentration of the drug in µg/mL and r is the correlation coefficient Theoretical basis assumes that the standard curve may be close to

Ngày tải lên: 29/05/2020, 12:33

... and colleagues (2004) found that employees with high POS and LMX reported high (job and career) satisfaction, both when value congruence was low and high, whereas the employees with low POS and ... hypothesis In sum, both hypothesis 2a and hypothesis 2b are supported Insert Table 2 and Figures 3 and 4 about here - -Hypothesis 3: POS will moderate the relationship between contract breach and performance ... contract, employees experience higher risks in trusting Trang 14their employer Hence they take less risk in the existing relationship, and diminish job performance and discretionary behaviors Therefore,

Ngày tải lên: 18/10/2022, 12:40

... Board approved this study as exempt under 45 CFR 46:101b, category 4 The IRB number is 140-04-EX Trang 43 OVERVIEW BOX What is already known on this subject: • Logbook data is used in clinical ... medical education • Little has been reported on the correlation between patient encounters and knowledge-based examination performance What this study adds: This study correlates performance on ... knowledge acquisition • Develop evaluations for experiential knowledge acquisition during clinical courses to better assess medical student performance Trang 5ABSTRACT Background: The Liaison Committee

Ngày tải lên: 02/11/2022, 11:59

... percentage of ethanol is too high, the nucleation rate is also very high, thus some particles coexist with the nanoflakes Schematic representation of the above discussion is clarified in Fig. 4 ... from the discharge curves for NCH-a, NCH-b, NCH-c, NCH-d and NCH-e are listed in Table 1 Galvanostatic charge-discharge (GCD) results are used for comparison because this measurement is reported ... growth, high capacitance and high energy density Remarkably, very high specific capacitance (770 F g−1) and energy density (33 Wh kg−1) per weight of the whole device (excluding electrolyte and packaging)

Ngày tải lên: 08/11/2022, 15:00

... diarrhea and dysentery, blood-stasis amenorrhea, postpartum stasis and obstruction, stabbing pain in heart and abdomen, chest impediment and heart pain, pain caused by genital disease, and hyperlipidemia ... stomach, move qi and dissipate stasis, resolve turbidity and lower lipid (2010) Trang 24 Symptoms and indications: Stagnation of undigested meat with epigastric distension, diarrhea and abdominal ... cation of herbal drugs is also the favored method in the framework of the international ISO-Standardisation1 of the “Quality and Safety of TCM” If the barcode DNA-analysis of all frequently used

Ngày tải lên: 19/02/2023, 08:07

... analysis of herbal medicines: thin layer and high performance liquid chromatography of chinese drugs, vol 1 and 2 Springer, Wien (2011) 19 Zhang, L.J.: Comparative anatomy and histochemistry ... hepaticus, Orbis renalis et vesicalis Effects (functions): To drain dampness to abate jaundice, disinhibit urine and relieve stranguria Symptoms and indications: Heat clearing, urinary diseases ... (like cholelithiasis, jaundice and red urine, heat strangury, stone strangury, slow and painful urination, edema and small quantity of urination, bladder and kidney stones) Rheumatism, pyrexia, dysentery,

Ngày tải lên: 19/02/2023, 08:08

... for CG irons: • • • • • • Lower coefficient of thermal expansion Higher thermal conductivity Better resistance to thermal shock Higher damping capacity Better castability, leading to higher casting ... solidification shrinkage is needed In other applications, however, malleable iron has a distinct advantage over ductile iron Malleable iron is preferred in the following applications: • • • • • Thin-section ... stem from their relative intermediate position between FG and SG irons Compared to FG irons, CG irons have certain advantages: • • • • • Higher tensile strength at the same carbon equivalent, which...

Ngày tải lên: 10/08/2014, 12:21

... "Specialty Steels and Heat-Resistant Alloys" in this Volume Classification of Steels Steels can be classified by a variety of different systems depending on: • • • • • • • • • The composition, ... hot-rolled bars The various mechanical and physical attributes implied by a quality descriptor arise from the combined effects of several factors, including: • • • • • • • The degree of internal soundess ... cooling is microalloyed medium-carbon steels (see Ref 36, 37 and the article "High- Strength Low-Alloy Steel Forgings" in this Volume) These steels contain small amounts of vanadium and niobium and...

Ngày tải lên: 10/08/2014, 12:21

... < = < = DIN standards JIS standards British standards AFNOR standards UNI standards Swedish standards References cited in this section Annual Statistical Report, International ... Stahlschlüssel (Key to Steel), References 1989 SAE Handbook, Materials, The Making, Shaping and Treating of Steel, 1989 SAE Handbook, Materials, Steels Heat Treatment and Processing Principals, The Physical ... Microstructure and Properties, Annual Statistical Report, Scr Metall., Proceedings of the Fifth International Conference on the Strength of Metals and Alloys, Encyclopedia of Materials Science and Engineering,...

Ngày tải lên: 10/08/2014, 12:21

... • • Turned and polished Turned, ground, and polished • • • Cold drawn, ground, and polished Cold drawn, turned, and polished Cold drawn, turned, ground, and polished Turning is done in special ... which are normally cold finished by cold rolling, or cold-drawn tubular products Cold-finished bars fall into five classifications: • • • • • Cold-drawn bars Turned and polished (after cold drawn ... designating sizes of structural shapes is as follows: • • • • • Beams and channels: By depth of cross section and weight per foot Angles: By length of legs and thickness in fractions of an inch...

Ngày tải lên: 10/08/2014, 12:21

... is another important mechanical property of steel springs However, this property is affected by many factors, and because of this complexity, fatigue is discussed in a separate section of this ... stainless is superior in corrosion resistance to type 302, particularly against pitting in salt water, but is more costly and is not considered a standard spring wire Type 302 is readily available and ... springs Both carbon and alloy steels are used extensively Steels for cold-wound springs differ from other constructional steels in four ways • • • • They are cold worked more extensively They are higher...

Ngày tải lên: 10/08/2014, 12:21

... to provide higher hardenability, increased wear resistance, higher impact resistance at increased strength, good machinability even at higher hardness, higher strength at elevated and low temperatures, ... Independent Integral and the Approximate Analysis of Strain Concentration by Notches and Cracks, J Appl Mech., Vol 35, June 1968, p 379 J.D Landes and D.H Shaffer, Statistical Characteristics of Fracture ... example, high- carbon steels: • • • Can carry somewhat higher contact stresses, such as those encountered in point contact loading in ball bearings Can be quenched and tempered, which is a simpler...

Ngày tải lên: 10/08/2014, 12:21

... 36 SAE/AISI 4340H UNS H43400 Heat-treating temperatures recommended by SAE Normalize (for forged or rolled specimens only): 870 °C (1600 °F) Austenitize: 845 °C (1550 °F) Figure 37 SAE/AISI E4340H ... 38 SAE/AISI 4620H UNS H46200 Heat-treating temperatures recommended by SAE Normalize (for forged or rolled specimens only): 925 °C (1700 °F) Austenitize: 925 °C (1700 °F) Figure 39 SAE/AISI 4626H ... 40 SAE/AISI 4718H UNS H47180 Heat-treating temperatures recommended by SAE Normalize (for forged or rolled specimens only): 925 °C (1700 °F) Austenitize: 925 °C (1700 °F) Figure 41 SAE/AISI 4720H...

Ngày tải lên: 10/08/2014, 12:21

... Numerous factors can contribute to cracking susceptibility (Ref 82, 83, 84, 85, 86, 87): • • • • • • • Carbon content Hardenability Ms temperature (the temperature at which martensite starts ... between hardened and nonhardened areas) References cited in this section 82 G.F Vander Voort, Failures of Tools and Dies, in Failure Analysis and Prevention, Vol 11, 9th ed., Metals Handbook, American ... from welding heat and the component is small enough, solution annealing will dissolve the precipitates and restore immunity However, in many cases this cannot be done because of distortion problems...

Ngày tải lên: 10/08/2014, 12:21

... low Highest 39-56 Medium to high High High Medium H11 Medium Deep Very low Highest 38-54 Medium to high Very high High Medium H12 Medium Deep Very low Highest 38-55 Medium to high Very high High ... Low Low High Highest A8 Medium Deep Lowest Highest 50-60 Medium High High Medium to high A9 Medium Deep Lowest Highest 35-56 Medium High High Medium to high A10 Medium to high Deep Lowest Highest ... medium High 36-54 Medium High High Medium to high H22 Medium Deep A, low; O, medium High 39-52 Medium High High Medium to high H23 Medium Deep Medium High 34-47 Medium Medium Very high Medium to high...

Ngày tải lên: 10/08/2014, 12:21