Aluminum tin 40 copper-steel metal bearing material and production method thereof

A manufacturing method and bearing material technology, applied in the direction of metal rolling, etc., can solve the problems of easy generation of porosity, difficulty in obtaining metallographic structure, high annealing temperature, etc., to reduce the generation of product bubbles, ideal metallographic structure, compliance and Good effect of high temperature characteristics

Active Publication Date: 2013-02-20
SHANGHAI HEWEI IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no domestic production, all the materials needed need to be imported
Moreover, in the prior art, when Al-Sn-40-Cu alloy is cast in a conventional iron mold, the segregation of tin is larger than that of 20 high-Sn alloy, and pores are prone to occur, which is difficult to eliminate in subsequent rolling and annealing processes, which will affect the quality of the material. Mechanical properties, and bubbles often appear between the Al-Sn 40 copper alloy and the pure aluminum layer due to weak bonding, resulting in a decrease in the yield of the alloy and an increase in production costs
In addition, the annealing temperature of aluminum tin 40 copper and steel is relatively high, and it is difficult to obtain an ideal metallographic structure.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Production material specification 7.3mm×6.3mm×112mm×425mm aluminum tin 40 copper-steel metal bearing material; total thickness 7.3mm (tolerance 0-0.15mm), steel layer 6.3mm±0.05mm, width 112mm (tolerance 0-0.50mm) mm), length 425mm (tolerance 0 ~ 3.0mm)

[0035] 1. Alloy preparation

[0036] According to the chemical composition requirements of the alloy, 35%-45% Sn, 0.4%-1.2% Cu, Fe3 , the crystallizer cooling water flow rate is 400ml / min-600ml / min, the continuous casting temperature is 690°C-720°C, adopt the method of pulling for 4 seconds-stop for 1 second-pull for 4 seconds, and the casting speed is 3.0mm / S-4.0mm / S: The ingot size is 16×330×L, and then sawed into alloy ingots with a size of 16mm×150mm×700mm.

[0037]After the ingot is leveled, it is roughened to 14mm (0-0.5mm) on both sides by 36# abrasive belt, and then brushed with 1.2mm double-sided steel wire (using a steel wire brush with a diameter of 0.2mm for brushing) of pure aluminum skin (The aluminum ...

Embodiment 2

[0047] Except following conditions, all the other are the same conditions and parameters of embodiment 1.

[0048] The chemical composition of the alloy requires 35% Sn, 1.2% Cu, 0.69% Fe, 0.29% Si, 0.69% Mn, and Al as the balance. The processing rate of double-sided composite rolling is 50%. The steel plate is selected from commercially available SPHD low-carbon steel produced by Baosteel. The processing ratio of the one-time composite rolling is 47%. The annealing set temperature is 270°C, and the temperature is constant for 10 hours, and then it is air-cooled after being released from the furnace.

[0049] After testing, the actual detection of finished aluminum-tin 40 copper alloy: alloy hardness 30.2-30.7HB, steel back hardness 181-185HB, total thickness 7.31-7.43mm, steel layer thickness 6.26-6.35mm, width 112.2-112.5mm, length 427- 428mm, the surface roughness of the steel back is 0.335um, the bond fastness is not delaminated when bending, and the shear strength of t...

Embodiment 3

[0051] Except following conditions, all the other are the same conditions and parameters of embodiment 1.

[0052] The chemical composition of the alloy requires 45% Sn, 0.4% Cu, 0.5% Fe, 0.2% Si, 0.5% Mn, and Al as the balance. The steel plate is selected from commercially available SPHDStWW22 low-carbon steel produced by Baosteel. The annealing set temperature is 290°C, the temperature is constant for 8 hours, and then it is air-cooled after being released from the furnace.

[0053] After testing, the actual detection of finished aluminum-tin 40 copper alloy: alloy hardness 30.2-30.7HB, steel back hardness 181-185HB, total thickness 7.31-7.43mm, steel layer thickness 6.26-6.35mm, width 112.2-112.5mm, length 427- 428mm, the surface roughness of the steel back is 0.335um, the bond fastness is not delaminated when bending, and the shear strength of the material is 75N / mm 2 , the tensile strength of the steel back is 528.0N / mm 2 , the metallographic structure is a micro-retic...

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Abstract

The invention discloses an aluminum tin 40 copper-steel metal bearing material and a production method thereof. The production method comprises that (1) aluminum tin 40 copper alloy ingots of which two surfaces are roughened and a pure aluminum layer are subjected to the dual-surface composite rolling, the cold rolling is conducted sequentially till the target thickness is reached, the aluminum tin 40 copper alloy ingots are obtained through horizontal continuous casting, the processing rate of the dual-surface composite rolling is more than 50% and the processing rate per cold rolling is in a range from 20% to 35%; and (2) steel plates of which two surfaces are roughened and the aluminum tin 40 copper alloy after being burnished in the (1) are subjected to the composite rolling and the annealing is conducted for 8-10 hours at the temperature of 280 DEG C+ / -10 DEG C. The material has good seizure resistance, adaptability and high-temperature properties and is suitable to diesel engine bearing of medium and low speed ships.

Description

technical field [0001] The invention relates to an aluminum tin 40 copper-steel metal bearing material and a manufacturing method thereof. Background technique [0002] Aluminum tin 40 copper-steel metal bearing material is especially suitable for the main bearing bush and connecting rod bearing bush of marine medium and low speed diesel engine, which can improve the performance of diesel engine and prolong its service life. There is no domestic production, and all the materials needed need to be imported. Moreover, in the prior art, when Al-Sn-40-Cu alloy is cast in a conventional iron mold, the segregation of tin is larger than that of 20 high-Sn alloy, and pores are prone to occur, which is difficult to eliminate in subsequent rolling and annealing processes, which will affect the quality of the material. Mechanical properties, and air bubbles often appear between the aluminum-tin 40 copper alloy and the pure aluminum layer due to weak bonding, resulting in a decrease in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/38
Inventor 娄兆云
Owner SHANGHAI HEWEI IND
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