Steel for wear-resistant steel ball and rolling processing method of the steel ball
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A processing method and technology of wear-resistant steel, applied in the direction of manufacturing tools, furnaces, heat treatment equipment, etc., can solve the problems of easy breakage, low cost, poor wear resistance, etc., to reduce labor intensity, high production efficiency, and steel ball quality. high effect
Active Publication Date: 2019-05-17
TIANJIN RONGCHENG UNITED IRON & STEEL GRP CO LTD
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The service life is short and needs to be replaced regularly, which increases the cost of production
[0004] In addition, there are also forged steel balls made of train wheels. This kind of steel ball is low in cost, but the hardness of the steel ball center is low, easy to break, and has poor wear resistance.
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Embodiment 1-6
[0082] Chemical composition and mass percentage thereof of table 7 embodiment 1-6
[0083]
[0084] 3. Test results: as shown in Table 8-12,
[0085] 1. According to CB / T226-1991 "Steel Low-magnification Microstructure and Defect Acid Intrusion Test Method", the low-magnification structure meets the standard requirements;
[0086] 2. According to CB / T224-2008 "Measurement of Decarburization Depth of Steel", the structure is normal sorbite and pearlite, the decarburization efficiency is 1.5% D, and all indicators meet the standard requirements;
[0087] 3. [O] content meets the standard requirements;
[0088] 4. As of February 10, 2017, track the passing rate of this batch of materials for warehousing inspection, eliminate defects such as rolling defects and scarring, and the comprehensive passing rate is 99.3%;
[0089] 5. As shown in Table 12, since the development of wear-resistant steel balls began in February, the overall quality has been stable, the production inspec...
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Abstract
The invention discloses steel for a wear-resistant steel ball and a rolling machining method of the wear-resistant steel ball, and belongs to the technical field of spherical steel product machining.The steel for the wear-resistant steel ball is characterized in that the wear-resistant steel ball comprises the following primary chemical components of, by mass percent, 0.70-0.78% of carbon, 0.15-0.35% of silicon, 0.80-0.90% of manganese, less than or equal to 0.03% of phosphorus, less than or equal to 0.03% of sulfur, 0.5-0.6% of chromium, less than or equal to 0.25% of nickel and less than orequal to 0.25% of copper. The rolling machining method comprises the technological steps of treatment in a rotary furnace, LF refining, VD refining, continuous casting, straightening, acid pickling,neutralization, rolling, quench tempering, packaging and warehousing, and thus the wear-resistant steel ball is obtained. The production efficiency of the wear-resistant steel ball manufactured by rolling is high and the quality of the wear-resistant steel ball is high; a rolling technology is carried out by a tandem mill, so that the labor intensity of workers is reduced, and the labor environment is improved; and the overall process is automatically controlled, so that the hardness of the wear-resistant steel ball is uniform, the core hardness is high, the percentage of damage is low, and the impact value of the wear-resistant steel ball is high.
Description
technical field [0001] The invention belongs to the technical field of spherical steel processing, and more specifically relates to a steel for wear-resistant steel balls and a rolling processing method of the steel balls. Background technique [0002] With the development of the economy and the continuous improvement of people's living standards, wear-resistant steel balls are a kind of crushing medium used in ball mills, and are closely watched by people in related fields in the crushing of materials in mills. Wear-resistant steel balls used in building materials, metallurgy, mining, ceramics and electric power industries are divided into two categories: cast steel balls and forged steel balls. Among them, cast steel balls mainly include chromium steel balls, high chromium steel balls and chromium steel balls. [0003] Generally speaking, cast balls can be called "heat-resistant" balls, which are suitable for dry grinding. In beneficiation, especially for semi-autogenous ...
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