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High-performance bolt of bearing seat type joint and manufacturing method thereof

A manufacturing method and high-performance technology, applied to bolts, manufacturing tools, nuts, etc., can solve problems such as low surface hardness, poor surface roughness, and poor wear resistance, and achieve improved mechanical properties, increased strength, and good Corrosion-resistant effect

Inactive Publication Date: 2020-05-05
TAIER HEAVY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the common bolt anti-corrosion process is blackening or dacromet, the effective coating is thin, the surface roughness is poor, it is harmful to the environment, the surface hardness is not high, and the wear resistance is not good

Method used

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  • High-performance bolt of bearing seat type joint and manufacturing method thereof
  • High-performance bolt of bearing seat type joint and manufacturing method thereof
  • High-performance bolt of bearing seat type joint and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The mass percentage of the high-performance bolt of the bearing seat type joint of the present invention is preferably: C: 0.22%, Mn: 0.51%, Si: 0.056%, P: 0.0005%, S: 0.0019%, Ni: 3.80%, Cr: 1.88%, Mo: 0.35%, V: 0.08%, Nb: 0.08%, and the balance is Fe.

Embodiment 2

[0035]The mass percent of the high-performance bolt of the bearing seat type joint of the present invention is preferably: C: 0.25%, Mn: 0.66%, Si: 0.046%, P: 0.0008%, S: 0.0012%, Ni: 3.58%, Cr: 2.14%, Mo: 0.40%, V: 0.09%, Nb: 0.06%, and the balance is Fe.

Embodiment 3

[0037] The mass percent of the high-performance bolt of the bearing seat type joint of the present invention is preferably: C: 0.28%, Mn: 0.62%, Si: 0.06%, P: 0.001%, S: 0.001%, Ni: 3.72%, Cr: 1.96%, Mo: 0.44%, V: 0.07%, Nb: 0.10%, and the balance is Fe.

[0038] Table 1 shows the chemical composition mass percentages of the imported material SNCM630 in the three embodiments of the present invention and the background technology.

[0039] Table 1. Material composition of high-performance bolts of bearing housing type joints (wt,%)

[0040] category C mn Si P S Cr Mo Ni V Nb Example 1 0.22 0.51 0.056 0.0005 0.0019 1.88 0.35 3.80 0.08 0.08 Example 2 0.25 0.66 0.046 0.0008 0.0012 2.14 0.40 3.58 0.09 0.06 Example 3 0.28 0.62 0.06 0.001 0.001 1.96 0.44 3.72 0.07 0.10 comparative example 0.33 0.44 0.24 0.023 0.012 2.76 0.68 2.57 / /

[0041] As can be seen from the above table, the high-perform...

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Abstract

The invention discloses a high-performance bolt of a bearing seat type joint. The high-performance bolt of the bearing seat type joint comprises the following chemical components of, in percentage bymass (wt%), 0.20-0.30% of C, 0.45-0.70% of Mn, no more than 0.08% of Si, no more than 0.01% of P, no more than 0.01% of S, 3.50-3.85% of Ni, 1.60-2.20% of Cr, 0.35-0.55% of Mo, 0.05-0.10% of V, 0.05-0.10% of Nb, and the balance Fe. A manufacturing method of the high-performance bolt comprises the steps of smelting, die forging, normalizing tempering, rough machining, tempering treatment, semi-finish machining, stress relief tempering, surface treatment, and finish machining. The high-performance bolt can meet the requirements of a main transmission universal shaft such as the bearing seat typejoint for high strength and toughness, high fatigue strength and corrosion resistance of the bolt, so that the service life of the bearing seat type main transmission universal shaft is prolonged. The invention also provides the manufacturing method of the high-performance bolt.

Description

technical field [0001] The invention relates to a high-performance bolt and its manufacturing method, in particular to bearing large torque, large working inclination, additional bending moment and impact vibration, and used under harsh working conditions such as water, oil stains, scale, and high temperature. The locking bolts of the main drive cardan shaft such as the bearing seat type joint. Background technique [0002] The cardan shaft of the main drive is an important equipment in the carbon steel, stainless steel, special steel and other steel rolling production lines of various steel plants. Imported parts account for the majority of the current cardan shafts. Most of the inspection and repair of the cardan shaft after it comes off the assembly line is done by foreign manufacturers. The repair cycle of the cardan shaft is long and the cost is high, which greatly increases the overall operating cost of the steel plant. [0003] From figure 1 It can be seen that in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/44C22C38/46C22C38/48F16B33/00F16B33/06C21D1/25C21D1/28C21D9/00C23C4/129C23C4/08
CPCC21D1/25C21D1/28C21D9/0093C21D2211/00C21D2211/008C22C38/002C22C38/02C22C38/04C22C38/44C22C38/46C22C38/48C23C4/08C23C4/129F16B33/008F16B33/06
Inventor 杨晓红朱健平黄显贵方凯李俊杰许训
Owner TAIER HEAVY IND
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