17-4PH stainless steel microstructure, corrosion r

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17-4PH stainless steel microstructure, corrosion resistance and physical properties

Solid solution. Martensite and 8 with stress in the copper activation of a Fe was dissolved. In the aging state, the stress you removed. Form a stable passive layer of protective film, resulting in automatic passivation. In the over aged condition, thick copper-rich phase precipitation, and inverse transformation generates Mc corrosion resistance of austenite to deteriorate. In sulfuric acid medium, but also the corrosion resistance of aging state of the best. Microscopic changes in the structure play a decisive role here. Decline of 217-4PH solution of copper in the corrosion resistance of Lu (m) forging casting corrosive environment hardening solid state culture solid solution hardening state 5H2SOj mandarin duck Front Teng】 78429l7842810H2SO room temperature 48h4.646.595.0924.3 ∞ HN03 Buddha blind ‰ O270290.14 machine】 910FIN () 330,48 h0.5l0.5O1.18l_888ocHCx) H boiling 8hO. 81013143m12 decline of 317-4PH and J7M2. OCrlSN | 9 Comparison of the corrosion resistance of the boat cabinet quality concentrations. Temperature. C Comparison of test performance better than Crl7Ni2. Boiling with acetic acid to 60 ships a considerable mouth 0Crl8N19 hydrochloric acid 5 ~ l080 Ibid Ibid 5 1035 1 ~ 535 ~ 8O acid phosphatase 2O ~ '0 boiling above Portugal than Crl7N [2 better than the boiling nitric acid from 25 to 65 Crl 0Crl8Ni9 worse than ? Ni2 good, and sodium hydroxide boiling 0Crl8Ni9 3080 ~ very good for all types of copper ammonium hydroxide] 0%} 9l} Tang corrosion was not soluble in acetic acid grant 5a/oNaCl +0.5 pass into the HzS, it boiling, which are H2S saturated solution,[link widoczny dla zalogowanych], the sample will be placed in one 17-4PH, 540c aging of the samples found hydrogen sulfide stress corrosion of 20 - the worst of a corrosion resistance,[link widoczny dla zalogowanych], the crack is along the crystal. 480C and 620C time the best corrosion resistance of the specimen, the crack is transgranular. Research 174PH steel in chloride medium pitting and corrosion fatigue found in 1oNaCI ten 10Nazs () boat quality, different aging temperature changes and microstructure caused by shot peening on the pitting is the emergence and development impact small; in 6FeC1 media, aging temperature increased from 540c to 650C, the corrosion fatigue resistance increased. Difference between the different test results from the corrosive media and is mainly caused by different test methods. Table 3 combines 174PH steel in corrosion resistance of a typical medium and OCrl8Ni9 steel with Crl7Ni2 comparison. 3. Physical properties of the co-melting temperature range of box 1400 ~ 1440C, different researchers have different phase change temperature, is due to the chemical composition of samples, heat treatment, test methods, such as different factors. A, the lowest 586c, the highest 670'C; Af minimum 7O4c,[link widoczny dla zalogowanych], the highest 802c; M, the lowest 130c, the highest 174C; M a minimum of 32c,[link widoczny dla zalogowanych], up to 6oc. Elastic modulus of the alloy shown in Table 4,[link widoczny dla zalogowanych], the elastic modulus of aging temperature had little effect. Tensile and compressive elastic modulus is also no great difference. Other physical properties shown in Table 5. 4 different degrees of bad Ju Yun ■ degree of flexibility in former times. C12095 {2o53151425480E. GPa; 201119411841731162. 155 bad 517-4PH Bringing the physical nature of the physical state of Ferret Frog Jubilee to reveal aging Chong O c log density. g/c7.757.8l7.86 resistivity, 10 · m9877 permeability, 1H/m7988A/m749O shot 15916A/m4856 to 95 the number of linear expansion】 357l × 1 口 C2O ~ 95l0.8lO, 8U92O ~ Z0510. 811.0】】 2420 ~ 315ll2Il312820 ~ 4251. 31】. 713.0 thermal conductivity chapter. W / m · cl591.220018-820-14002】 -4 Main