197 results about "Abrasion (mechanical)" patented technology

The invention relates to an experiment method and an injury evaluation method of an engineering material and particularly relates to corrosion experiment and injury evaluation methods of the engineering material under a wind sand environment. An experiment system and a method for operating the experiment system are included; the experiment system comprises a wind sand environment simulation system and an erosion room; the injury evaluation method of the engineering material based on a wind sand environment experiment system comprises a weight-loss grading method and a weight-loss rate evaluation method, wherein weight loss is the difference of masses of a test piece before and after an abrasion test, namely deltam=m1-m2; the weight-loss rate is the ratio of the difference of the masses of the test piece before and after the abrasion test to the total mass of sand used in the time period, namely alpha=(deltam / ms*t)*100%=(m1-m2 / ms*t)*100%. The experiment system provided by the invention has the advantages that an actual wind and sand corrosion environment can be really simulated, erosion mechanical parameters are easy to accurately control, a testing period is short and the research cost is low; the experiment and injury evaluation methods explore an erosion abrasion rule and an injury mechanism of the engineering material from macroscopic and microcosmic aspects.

The invention relates to a high-strength high-toughness abrasion-resistant cast steel material and a preparation method thereof. The novel high-strength high-toughness abrasion-resistant cast steel material is pertinently designed and developed for the severe working conditions that in the operation process, a trough side not only bears violent friction of coal, a scraper blade and a chain, but also bears operation load of a coal cutter, lateral force and longitudinal force used for pushing and pulling a hydraulic support, extrusion force and impact force generated when large sized coal and rock get stuck in a trough and the like. According to the mechanical performance indexes the cast steel material can reach, the tensile strength Rm>=900 MPa, the fracture elongation A>=16%, the impact absorbing energy Aku>=32J, and the Brinell hardness HB is 270-310. According to the abrasion resistance, weightlessness is 1.55+ / -0.03 g, and the weight loss ratio is 15.5+ / -0.3 mg / m. According to the preparation method, production is easy, the cost is low, and the performance is high. Quantity production and application can be achieved in the industries such as mines, energy, transportation, agricultural machinery and engineering machinery.

The invention provides a high-strength and high-abrasion-resistant low-expansion-coefficient aluminum-based alloy.The alloy is aluminum-based alloy containing aluminum, zinc, copper, magnesium, bismuth, titanium, boron, strontium, rare earth and other inevitable impurity elements.The high-strength and high-abrasion-resistant low-expansion-coefficient aluminum-based alloy has good cutting performance, excellent mechanical properties, low expansion coefficient and low production cost, has the competitive advantages both at home and abroad and can replace brass, tin bronze and zinc-based alloy, and the production costs of enterprises are greatly reduced.

The installation and use of abrasion and corrosion resistant polyolefin and polyolefin blend liners in the production or injection string of a well is shown. The lining is employed for the principal purpose of reducing wear or corrosion on the tubing string or wear on the associated production equipment. In a preferred embodiment of the invention, the polymer liner is characterized by polypropylene material, which is abrasion resistant and which has a coefficient of friction that is lower that the coefficient of friction of metal tubing. Also, disclosed herein are tubular goods and tubular good liners which decrease or eliminate friction and mechanical wear and decrease or eliminate chemical corrosion to the walls of the tubular good. The liners may include a diffusion barrier, an adhesive, and a friction and wear resistant layer.

The invention relates to a manufacturing method for a large-caliber abrasion-resistant corrosion-resistant ternary composite reducer pipe. The nominal diameter (DN) of the reducer pipe is 600mm-1200mm, and reducer pipe is used for a large-caliber ternary composite pipeline for transporting corrosive wearing, erosive wearing, abrasion scaling, composite corrosion media and the like. A manufacturing process for manufacturing an abrasion-resistant corrosion-resistant composite layer on the inner surface of the reducer pipe and a manufacturing method include the step that 1 a self-propagating high-temperature centrifugal synthesis (SHS) reaction is conducted through a gradient method in a segmentation mode step by step, and reaction products TiB2 / ZrB2-Al2O3 and Fe are distributed on the inner surface of the reducer pipe effectively; 2 abrasion-resistant materials are used for filling the spaces among the gradients and mainly composed of abrasion-resistant inorganic particles and modified resin composite adhesives; 3 inner surface pouring forming is conducted through a model vacuum pouring process. By means of the large-caliber abrasion-resistant corrosion-resistant ternary composite reducer pipe, combination force of a lining composite layer and an outer steel pipe interface is strong, mechanical impact resistance is high, abrasion resistance and corrosion resistance are good, the service life is long, and important project value is achieved.