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A barrel and metal technology, which is applied in the field of multi-component boride-based superhard bimetallic barrel and its preparation, achieves the effects of good high temperature wear resistance, simple manufacturing process, and good machinability
Active Publication Date: 2012-10-10
浙江华业塑料机械股份有限公司
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Problems solved by technology
[0004] The first technical problem to be solved by the present invention is to provide a metal machine barrel with good
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Embodiment A
[0047] In this embodiment, 40Cr steel is used as the core rod, and a layer of Mo is coated on the surface of the core rod by hot isostatic pressing sintering. 2 FeB 2 -Fe-based cermet layer, and then refined processing to make the barrel. The raw material powders used in the preparation of cermets are pure Mo powder (5-10μm), pure Cr powder (5-10μm), pure Ni powder (5-10μm), pure Fe powder (10-15μm) and FeB powder (20~ 30μm), the mixing ratio is 35% FeB, 45% Mo, 3% Ni, 2% Cr, 15% Fe. The specific preparation method of the bimetal barrel is as follows:
[0048] 1. Put the core rod into the special sheath, and fill the gap between the core rod and the sheath with the mixed raw material powder;
[0049] 2. Put the whole envelope into the sealed container of the hot isostatic pressing equipment and vacuumize;
[0050] 3. The cermet body is prepared by the hot isostatic pressing sintering method, using argon as the pressurizing medium, and the process parameters for controlling the hot ...
Embodiment B
[0057] The preparation of the metal barrel in this example is basically the same as that in Example A, except that the mixing ratio of the raw material powder is changed to: 30% FeB, 50% Mo, 3% Ni, 2% Cr, 15% Fe, and others The experimental conditions are the same. The microhardness test of the cermet of the bimetallic barrel prepared above was carried out, and the average hardness was 1137.5Hv (HRC73).
Embodiment C
[0059] The preparation of the metal barrel in this example is basically the same as that in Example A, except that the mixing ratio of the raw material powder is changed to: 30% FeB, 45% Mo, 3% Ni, 2% Cr, 20% Fe, and others The experimental conditions are the same. The microhardness test was performed on the cermet of the bimetallic barrel prepared above, and the average hardness was 1110.1Hv (HRC72.4).
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Abstract
The invention discloses a metal cylinder and a manufacturing method thereof. According to the metal cylinder, an alloy steel rod containing chrome molybdenum is used as a cylinder material (1); the periphery of the cylinder material (1) is wrapped by a polybasic boride base metal ceramic layer (2) through a sintering method; and the polybasic boride base metal ceramic layer (2) is a Mo2FeB2-Fe base metal ceramic layer, a Mo2NiB2-Ni base metal ceramic layer or a WCoB-Co base metal ceramic layer. The manufacturing method of the metal cylinder comprises the following steps of: placing the cylinder material in a sheath; filling proportioned raw material powder in a gap of the cylinder material and the sheath; integrally placing the sheath in a sealed container and vacuuming; sintering in the sealed container; and finishing the polybasic boride base metal ceramic layer to prepare the metal cylinder. The polybasic boride base super-hard bimetal cylinder or metal cylinder has the advantages of low comprehensive cost, simple manufacturing process, long service life, suitability for industrialization and the like, and can be used for replacing currently and widely used cylinders subjected to treatment such as nitriding, spray welding and casting.
Description
Technical field [0001] The invention relates to the technical field of screw manufacturing, in particular to a multi-element boride-based superhard bimetallic barrel and a preparation method thereof. Background technique [0002] The barrel is the core component of the plastic molding equipment and is the part that is heated, extruded and plasticized. The barrel fails and is damaged due to friction and wear. With the rapid development of the chemical industry, a variety of new plastic raw materials continue to emerge. High-strength reinforced plastic raw materials often contain reinforcing fibers such as carbon, asbestos, glass, and boron. In addition, in order to obtain various special properties or reduce costs, a certain proportion of various fillers, such as chalk, silica, barite, clay, cellulose, mica, talc and metal powder, are often added to the plastic resin. The addition of these reinforcing agents, fillers and inorganic colorants aggravated the abrasion and corrosion ...
Claims
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