43 results about "Season cracking" patented technology

The invention provides a Ni-reduced austenite stainless steel having excellent recyclability with no problem of producibility depression to be caused by the surface property thereof and having good workability, season cracking resistance, corrosion resistance and stress corrosion cracking resistance in point of the material characteristics thereof. The steel comprises C in an amount of more than 0.05 % (by mass) and within a range of from 0.15 to 0.3 % as (C+N), Si in an amount of at most 1 %, Mn in an amount of from 0.5 to 2.5 %, Ni in an amount of from 3 to 6 %, Cr in an amount of from more than 16 to 25 % and Cu in an amount of from 0.8 to 4 %, and has Md30 of the following formula (1) of from -50 to 10 and SFE of the following formula (2) of at least 5: Md30 = 551-462(C+N)-9.2Si-8.1Mn-29(Ni+Cu)-13.7Cr (1), SFE = 2.2Ni+6Cu-1.1Cr-13Si-1.2Mn+32 (2).

An improved season cracking resistance of a metallic fastener member is provided and includes a copper alloy containing zinc as a base material. The metallic fastener member includes, as a base material, a copper alloy containing zinc, and the metallic fastener member has a surface to which a rust prevention treatment has been applied and has such a property that, when analyzed by a scanning X-ray photoelectron spectroscopy apparatus, a maximum value of an atomic concentration of Mn is detected at a depth of 100 nm or less from the surface.

The invention relates to the field of processing of artware, and in particular relates to a processing technique of a peach kernel bracelet. The processing technique of the peach kernel bracelet has the advantages that the contact area of a peach kernel and air is reduced by polishing during processing, and thus the property of peach kernel is unlikely to change, and the peach kernel is not easy to suffer from seasoning crack and graying; in addition, by adopting the polishing, wanting edges and burrs on the surface of the peach kernel can be effectively removed and the surface of the peach kernel can be smooth, so that the skin can be prevented from being scratched by the peach kernel during wearing; the peach kernel is dried in the air, and therefore, the water loss which leads to graying can be avoided during the drying of the peach kernel, and the nice appearance of the peach kernel is ensured.

The invention discloses a novel drying and calcining process for an integrated extrusion type diesel vehicle denitration catalyst. The novel drying and calcining process comprises primary drying and calcining, during primary drying, intensive type air intake and intensive type air discharge are adopted, so shat uniform and stable air current circulation can be guaranteed, and therefore, a uniform moisture removal effect is achieved; during calcining, a calcining furnace adopts wind-cone-form air intake, and radioactive cone-shaped air with a uniform temperature is formed through a specific cone-shaped air inlet, so that uniformity of hot air can be controlled, and seasoning cracks due to the fact that the catalyst is directly blown by hot air are avoided; and on the premise of reaching indexes such as strength and physical defects of the diesel vehicle denitration catalyst, the percent of pass of finally obtained products is guaranteed.

The invention relates to a rock mass power function type microscopic season cracking three-dimensional model. The three-dimensional model comprises a rock mass microscopic particle bonding stress three-dimensional mode giving a consideration to a twisted contribution factor, a microscopic particle bonding season deterioration attenuation three-dimensional power function mode giving the consideration to the twisted contribution factor, a Mohr-Coulomb microscopic particle bonding season cracking criterion giving the consideration to twisted contribution effect and provided with tension cut-off limit, and a microscopic particle linear contact three-dimensional model giving the consideration to damping effect. The rock mass power function type microscopic season cracking three-dimensional model is suitable for the rock mass, and the relation between the stress and the crack expansion speed of the rock mass is in accordance with the power function under a three-dimensional stress space condition, and is used to provide technical support for surrounding rock long-term stability prediction, evaluation, and design optimization of deep rock mass engineering under the three-dimensional stress condition.

The invention discloses a collection unearthed historical site relic in-situ environment water supplement protection system and water supplement method. The collection unearthed historical site relic in-situ environment water supplement protection system is composed of a water purification device, a water temperature regulation and control device and a water supplement tail end device. The water purification device is utilized for conducting purification treatments such as filtration, algae removal and sterilization on urban water supply. According to signals fed back by a temperature sensor buried in soil, the water temperature regulation and control device is utilized for regulating and controlling the temperature of supplemented water so as to ensure that the temperature of the supplemented water is consistent with the temperature of the soil environment of a historical site. A soil water content sensor, a soil temperature sensor, a flow control valve and the water supplement tail end device composed of macromolecule water-absorbent resin are utilized for conducting slow permeation and water supplement on the historical site and the soil environment of the historical site so as to supplement water loss slowly evaporated by the unearthed relic and to maintain the wet in-situ environment formed before the relic is unearthed, and therefore seasoning crack damage, caused by water loss, to the historic site relic is avoided, and the unearthed historical site relic can be stored for a long time.