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Pre-alloying powder

A pre-alloyed powder and alloy powder technology, applied in the field of powder metallurgy materials, can solve the problems of poor high temperature resistance, easy oxidation, high price, etc., and achieve the effect of improving high temperature resistance, strength and hardness, and wear resistance

Active Publication Date: 2013-09-11
重庆成俊工贸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Adding nickel, cobalt, copper, chromium, molybdenum and other substances to improve the strength of powder metallurgy materials, but the traditional pre-alloyed powder has poor high temperature resistance, is prone to oxidation, and its products wear a lot when used and the price is high, resulting in inapplicable products. high priced product

Method used

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Embodiment Construction

[0016] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings; it should be understood that the preferred embodiments are only for illustrating the present invention, rather than limiting the protection scope of the present invention.

[0017] figure 1 For, as shown in the figure: a pre-alloyed powder provided by the present invention, the weight percentage of the pre-alloyed powder is composed of: Ni 9.5-10.5%, Cr 24-25%, Mo 22-23%, C≤ 0.03%, other ≤ 3%, the balance is Co. Others in the pre-alloyed powder are impurities. The bulk density of the pre-alloyed powder is 2.9-4.0g / cm 3 , Hydrogen loss (HL) <0.1%.

[0018] The following formula can also be used: the raw materials are weighed according to the weight unit as follows: Ni 9.8%, Cr 24.2%, Mo 22.2%, other 1%, and the balance is Co.

[0019] Or the following formula can also be used: the raw materials are weighed according to the weight unit as...

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Abstract

The invention discloses pre-alloying powder, and relates to the technical field of powder metallurgy materials and an application thereof in manufacturing a powder metallurgy valve seat ring. The pre-alloying powder comprises the following materials in percentage by weight: 9.5-10.5% of Ni, 24-25% of Cr, 22-23% of Mo, less than or equal to 0.03% of C, less than or equal to 0.1% of HL, less than or equal to 3% of other materials and the balance of Co, wherein the other materials in the pre-alloying powder are impurities; the apparent density of the pre-alloying powder is 2.9-4.0g / cm<3>; and the particle size of particles in the pre-alloying powder is -325 meshes. According to the pre-alloying powder, the alloying powder is made of metal materials such as Ni, Cr, Mo, Co and the like, especially the pre-alloying powder is used as the alloying powder in manufacturing the valve seat of a motorcycle engine, the oxidation resistance of the valve seat ring made of the pre-alloying powder is high, the strength and the hardness of the valve seat ring are effectively improved, the wear resistance is improved and the high temperature resistance is effectively improved.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy materials, in particular to a pre-alloyed powder used for making valve seat rings. Background technique [0002] Powder metallurgy technology can produce products with high dimensional accuracy requirements, and can also produce parts with complex shapes, and can greatly reduce costs. Powder metallurgy products are widely used as parts of various machinery and devices. Pre-alloyed powder is the alloying element (Nickel, cobalt, copper, chromium, molybdenum, etc.) are melted with iron in the molten steel smelting process or before atomization, and produced by high-pressure water atomization technology. Its main advantages are: a variety of alloying elements form a multi-element alloy with uniform properties, which can more effectively use alloying elements; the distribution of alloying elements and microstructure in the powder particle composition is uniform, and it has high strength and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00C22C30/00
Inventor 胡军王兴胡成俊颜学惠苏义蓉幸定军蔡屏萍袁浩
Owner 重庆成俊工贸有限公司
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