Low carbon high sulfur phosphorus easy cutting steel

A free-cutting steel and high-sulfur-phosphorus technology, applied in the field of sulphur-based free-cutting structural steel, can solve the problems of low production cost, low free-cutting performance, difficult production and the like

A free-cutting steel and high-sulfur-phosphorus technology, applied in the field of sulphur-based free-cutting structural steel, can solve the problems of low production cost, low free-cutting performance, difficult production and the like

CN1718828AInactive Publication Date: 2006-01-11BAOSHAN IRON & STEEL CO LTD
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  • Low carbon high sulfur phosphorus easy cutting steel
  • Low carbon high sulfur phosphorus easy cutting steel
  • Low carbon high sulfur phosphorus easy cutting steel

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0060] The hot-rolled wire rod selected from the 4# material, the cutting performance test of two parts was carried out in Shanghai Qingpu Xinzhan Company, the part processing diagram (see Figure 10 ) shown.

[0061] Test process: hot-rolled wire rod (∮6.5) → pickling and alkali cleaning → cold drawing (∮6.1) → blanking (length 2750mm / piece) → CNC machine tool (model: 12BO12-II, produced by TSUGAMI Japan, cutting tool: tungsten Steel knife, made in Taiwan) → finished parts

[0062] Parts standard: length 410.5mm, holes need to be drilled; radial dimension tolerance ≤0.04mm, surface finish RA=1.6 (the cutting speed of SUM24L lead-based steel used by the user in the normal production state is 4000r / min, and the feed rate is 0.03mm / r.)

[0063] Test parameters: feed rate 0.03-0.10mm / r, cutting speed 4000, 4500, 5000r / min respectively.

[0064] Test results: at the same cutting speed as SUM24L, the cutting and processing of 4# material was smooth; the chip breaking performanc...

example 2

[0066] The hot-rolled wire rods selected from 5# and 6# materials were tested in Xiamen Kelong Electric Co., Ltd. on the cutting performance of various materials.

[0067] Test process: hot rolling disc (∮18)→acid washing and alkali washing→cold drawing (∮16)→cutting (length 2750mm / piece)→NC machine tool (tool: ceramic)→finished parts

[0068] Parts standard: Radial dimension tolerance ≤0.04mm, surface finish RA=1.6 (The cutting speed of lead steel (12L14) used by the user in the normal production state is 4000r / min, and the feed rate is 0.06mm / r.)

[0069] Test parameters: feed rate 0.06mm / r, cutting speed 4200-5000r / min

[0070] Test results: At a cutting speed higher than 12L14, the cutting and production of 5# and 6# materials are smooth; the chip breaking performance is equivalent to that of lead-containing free-cutting steel; the dimensional accuracy and surface finish of the parts have reached the standard requirements.

[0071] Material

[0072] Ma...

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Abstract

The cutting steel with low content of C and high contents of S and P contains proportionally C, Si, Mn, P, S, N, Ca, Mg, Al, O, and Fe. It is prepared through smelting in electric furnace, conticasting and tandem rolling to become wire and rod. It has high cutting and mechanical performance.

Description

technical field [0001] The invention relates to the composition design of free-cutting structural steel in the metallurgical industry, in particular to sulfur-based free-cutting structural steel. Background technique [0002] Structural steel is a common type of steel. In recent years, with the rapid development of machinery and equipment manufacturing industries (increased degree of automation in machining, wide application of CNC machine tools), the ease of cutting of structural steel materials (reducing the machining of parts cost, improve production efficiency) has become the pursuit of steel users (the cost of cutting and processing accounts for about 50% of the total cost of parts, and the price competition of home appliances, office equipment, automobiles, IT and other industries where parts are applied is becoming increasingly fierce, and the cost of free-cutting steel The proportion of consumption in the total steel demand is increasing year by year. For example, in...

Claims

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Application Information

Patent Timeline
11 Jan 2006
Publication
CN1718828A
IPC
C22C38/06; C22C38/42; C21D6/00
Inventors
胡俊辉; 杨伟宁