31results about How to "Avoid excessive hardness" patented technology

A drill bit having a bit body having at least one blade thereon, at least one cutter pocket disposed on the at least one blade, at least one cutter disposed in the at least one cutter pocket, hardfacing applied to at least a selected portion of the drill bit is shown and described. The hardfacing includes a first hardfacing layer disposed on the selected portion of the drill bit, a second hardfacing layer disposed on the first hardfacing layer, wherein the first hardfacing layer has a hardness different than a hardness of the second hardfacing layer.

The invention relates to a surgical nail in the form of an intramedullary nail with a central axis made from a material M with a tensile strength F_z, compressive strength F_d, density ρ₂ and modulus of elasticity E. Said nail has a transverse bore extending transversely to the central axis and having a cross-sectional profile F and a transverse axis, the cross-sectional profile F having a maximum length a that runs in the direction of the central axis and a maximum width b that runs perpendicular to the length. An insert with the longitudinal axis, made from material m and having a modulus of elasticity e that is smaller than the modulus of elasticity E of material M, can be introduced into the transverse bore. The insert also has a length L that runs in the direction of its longitudinal axis and satisfies the condition L>0.2 D.

The present invention generally relates to an improved two-part oxidizing system, as well as oxidizing compositions and methods for making and using the same, and in a particular embodiment to a two-part oxidizing system that, when mixed, yields an oxidizing composition. The two-part oxidizing system includes a metal chlorite first part, and an acid second part where the acid is sodium acid sulfate or a derivative thereof.

A metal clinch fastener has portions thereof selectively hardened to enable use of the fastener with metal members of differing hardness values. The selective hardening of the fastener enables mounting with application of required forces for piercing and/or plastic deformation of the metal member without undesirable deformation or distortion of the fastener. The screw thread region or zone of the fastener has a relatively lesser hardness suitable and may be pre-threaded or later threaded by engagement with a thread forming screw.

A display device includes a wire substrate including a wire unit for driving the display device, an integrated circuit chip mounted at the wire substrate, and a pad unit extended from the wire unit to be disposed between the wire substrate and the integrated circuit chip. The pad unit is connected to the integrated circuit chip. The pad unit includes a first conductive layer extended from the wire unit, and a second conductive layer disposed on the first conductive layer. The hardness of the second conductive layer is less than the hardness of the first conductive layer.

A golf ball comprising a core (1), intermediate layer (3), and cover (5), wherein the intermediate layer (3) is provided with a plurality of apertures through which the core (1) is exposed, wherein the outer surface of the intermediate layer (3) and the surface of the core (1) exposed through the apertures are on substantially the same spherical surface, and wherein the hardness of the intermediate layer (3) is greater than that of the core (1). The golf ball achieves both a high ball resilience and a soft impact feel.

The invention discloses a vermicular graphite cast iron scroll plate and a production process thereof. The plate is prepared by casting vermicular graphite cast iron, a raw material for the plate comprises the following components of, by mass: 3.6%-4.0% of C, 1.6%-2.0% of Si, 0.4%-0.8% of Mn, 0%-0.25% of P, 0.01%-0.04% of S, 0.20-0.6% of Cu, 0.04-0.08% of Sn, 0.10%-0.3% of Cr and the balance Fe and accompanying impurities. According to the vermicular graphite cast iron scroll plate, in the raw material production process, 0.30%-0.40% of a modification treating agent is adopted to control the creep rate of the graphite form to be 20%-60%, the mechanical performance of the scroll plate is greatly improved, the tensile strength is larger than or equal to 450N/mm<2>, the yield strength is larger than or equal to 315N/mm<2>, the elongation rate is less than or equal to 3%, and the hardness range is HB200-HB250, and the durability life test is up to 2600 hours.

The invention discloses vermicular graphite cast iron and preparation process and application thereof. By mass percentage, 3.6%-4.0% of C, 1.6%-2.0% of Si, 0.4%-0.8% of Mn, 0%-025% of P, 0.01%-0.04% of S, 0.20-0.6% of Cu, 0.04%-0.08% of Sn, 0.10%-0.3% of Cr, and the balance Fe and accompanying impurities are included. In the production process, 0.30%-0.40% of a modification agent is adopted in theproduction process to control the vermicularity of the graphite form to be 20%-60%, the mechanical performance of a material is greatly improved, the strength of extension is larger than or equal to450 N/mm<2>, the yielding strength is larger than or equal to 315 N/mm<2>, the elongation at break is smaller than or equal to 3%, a hardness range is HB200-250, the endurance service life reaches 2600 h according to a test, and the vermicular graphite cast iron can be applied to a compressor core part vortex disk high in mechanical strength requirement.

A micromechanical device that includes a carrier substrate; a sensor device that is situated on the carrier substrate and spaced apart from a surface section of the carrier substrate with the aid of spring elements in such a way that the sensor device is oscillatable relative to the surface section; and at least one stopper element, situated on the sensor device and/or on the surface section of the carrier substrate, which limits a deflection of the sensor device in the direction of the surface section.

The invention discloses a heat treatment process used after rolling of a 12Cr1MoVG high-pressure steel pipe. The heat treatment process comprises the steps that (1), the 12Cr1MoVG high-pressure steel pipe obtained after hot rolling is subjected to heat preservation at the austenitizing temperature of 970-1020 DEG C for 60 minutes or more; (2), the steel pipe is taken out and subjected to air cooling, and the temperature is dropped to 920-980 DEG C from the initial temperature; (3), quenching is performed at the temperature of 820-850 DEG C; (4), high-temperature tempering is performed at the temperature of 720-760 DEG C, and the heat preservation time is larger than or equal to 120 minutes. The heat treatment process has the advantages that an aerial slowing-cooling process is performed before quenching and water entering, after a sufficient amount of ferrite F tissues are precipitated, water entering for rapid cooling is performed, and the problem of excessively high hardness is avoided, so that the steel type has good room-temperature machining performance, high-temperature mechanical performance and low crack sensitivity, and the pipe suitable for a high-pressure boiler is suitable for a high-temperature, high-pressure and corrosion environment.

A pad printing device for printing a window of a display device includes a pad to transfer ink to the window. The pad includes a printing portion to transfer the ink to the window by being pressed against the window and a body portion disposed on the printing portion and to apply a pressure to the printing portion. A hardness of the printing portion is less than a hardness of the body portion, and a sidewall of a portion of the pad where the printing portion contacts the body portion is substantially perpendicular to the window.

A golf ball includes a core and a three-layer cover disposed adjacent the core. The three-layer cover includes an inner cover, an intermediate cover, and an outer cover. The inner cover includes a non-ionomeric E/Y copolymer where E is an olefin and Y is a carboxylic acid. The inner cover has a hardness of about 45 to 68 Shore D. The outer cover includes a castable thermoset polyurethane and has a hardness of about 40 to 62 Shore D. The intermediate cover layer, disposed between the inner and outer cover layers, is formed from a polyamide composition, where the polyamide composition includes a transparent polyamide having a light transmission of about 50% or greater.

The invention relates to low-cost plastic mold steel with uniform hardness in a cross section direction and a production method of the low-cost plastic mold steel. The steel comprises the following chemical components in percentage by mass: 0.40-0.50% of C, 0.70-1.00% of Si, 1.60-2.00% of Mn, less than or equal to 0.015% of P, less than or equal to 0.005% of S, 0.80-1.00% of Cr, 0.010-0.050% of Als, 0.010-0.030% of Ti, 0.0010-0.0020% of B, 0.0030-0.0080% of N and the balance of Fe and inevitable impurities. Meanwhile, the chemical components further need to meet the formula: B= -0.001507 + 0.0455Als + 0.0318Ti + 0.171N. According to the steel, precious metal elements such as Mo and Cu are not added, only vacuum treatment is adopted for refining molten steel, the rolling process is not limited, through the production process path of stacking cooling and tempering after rolling, normalizing heat treatment generally adopted by the plastic mold steel after rolling is omitted, so that the plastic mold steel is produced at low cost; and the steel disclosed by the invention is high in hardenability, uniform in hardness distribution along the cross section, and suitable for manufacturing plastic molds which have strict requirements on dimensional accuracy, surface roughness and the like and have complex cavities.

The invention relates to an edge starching wheel structure of an edge starching device. The edge starching wheel structure comprises a wheel disc and a connecting rotary shaft, wherein the connectingrotary shaft is fixed at the central axis of the wheel disc, a plurality of raised edge starching columns are evenly arranged on the outer side of the wheel disc along the circumferential direction atintervals, and the axis directions of the edge starching columns are arranged along the radial direction of the wheel disc. The edge starching wheel structure has the advantages that edge starching area can be reduced, sizing agent consumption for edge starching can be reduced favorably, the problem of excessively high fabric edge hardness caused by linear edge starching in the prior art can be avoided, the tightness difference between the edge of the edge-starched fabric and middle fabric, and the difficulties in the follow-up printing or composite processing of the fabric can be lowered favorably.

The present invention relates to a gel type food composition with excellent storage stability and a method for preparing thereof, and more specifically, relates to a gel type food composition having excellent physical properties by reducing changes of physical properties, contamination and syneresis during storage or distribution.

The invention relates to a joint which can be subjected to the temperature influences of an external medium (20) and joins an especially ceramic component (2) to an especially metallic component (1). Said joint consists of a first adhesive joint (14) between the metallic component and the ceramic component, and a second adhesive joint (22), the adhesive (16) of the second joint having a higher elasticity than that (10) of the first adhesive joint (14), and the second joint being arranged in such a way that it prevents direct contact between the first adhesive joint (14) and an external medium (20). The inventive joint can preferably be used, for example, preferably in a sensor module of a measuring appliance which can be introduced into a medium to be analyzed.

A golf ball including a core and a cover disposed about the core. The cover includes a thermoplastic inner cover layer having a hardness between 55 and 60 Shore D; an outer cover layer having a hardness between 55 and 60 Shore D; and a stiff intermediate cover layer disposed between the inner and outer cover layers and having a hardness greater than the inner cover layer and the outer cover layer. The inner cover layer is formed from a non-ionomeric composition including a non-ionomeric stiffening polymer and at least one E/Y copolymer or E/X/Y terpolymer, where E is an olefin, Y is a carboxylic acid, and X is a softening comonomer. The intermediate cover layer is formed from a stiff thermoplastic polyurethane or polyurea composition and the cover outer cover layer is formed from a thermoset polyurethane, a polyurea, or a urethane-urea blend.