Cast steel shot with low-carbon martensite structure and preparation process for cast steel shot

A technology of low-carbon martensite and cast steel shot, which is applied in the direction of manufacturing tools, heat treatment equipment, furnaces, etc., can solve the problems of increased raw material cost and process cost, consumption of precious metal resources, poor fluidity of molten steel, etc., and achieve a reduction in broken rate , raw material cost control, and the effect of yield improvement

A technology of low-carbon martensite and cast steel shot, which is applied in the direction of manufacturing tools, heat treatment equipment, furnaces, etc., can solve the problems of increased raw material cost and process cost, consumption of precious metal resources, poor fluidity of molten steel, etc., and achieve a reduction in broken rate , raw material cost control, and the effect of yield improvement

CN113789477AActive Publication Date: 2021-12-14DALIAN JIAOTONG UNIVERSITY +1
13 Cites 1 Cited by

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Cast steel shot with low-carbon martensite structure and preparation process for cast steel shot
  • Cast steel shot with low-carbon martensite structure and preparation process for cast steel shot
  • Cast steel shot with low-carbon martensite structure and preparation process for cast steel shot

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] According to the cast steel shot of two middle carbon content of the present invention, its chemical composition is respectively:

[0047] ① 0.29%C, 2.05%Mn, 0.37%Si, 0.08%P, 0.039%S, the balance is Fe and unavoidable impurities and alloy elements brought in by raw materials during smelting;

[0048] ②0.28%C, 1.98%Mn, 0.37%Si, 0.02%Nb, 0.06%P, 0.037%S, the balance is Fe and unavoidable impurities and alloying elements brought in by raw materials during smelting.

[0049] Its preparation steps include:

[0050] S1. Put the raw materials into the medium-frequency induction furnace according to the weight ratio for smelting. The smelting temperature is 1650-1750°C. During the smelting process, the chemical composition is adjusted until the molten steel meets the chemical composition requirements;

[0051] S2. Continuously pour the smelted molten steel into a high-speed centrifugal forming machine, and throw it into a pool below 40°C under the action of centrifugal force t...

Embodiment 2

[0058] According to the chemical composition of the cast steel shot of two middle carbon content of the present invention is respectively:

[0059] ① 0.46%C, 1.63%Mn, 0.47%Si, 0.11%Ti, 0.07%P, 0.032%S, the balance is Fe and unavoidable impurities and alloy elements brought in by raw materials during smelting;

[0060] ②0.45%C, 1.59%Mn, 0.47%Si, 0.11%Ti, 0.05%Nb, 0.07%P, 0.031%S, the balance is Fe and unavoidable impurities and alloying elements brought in by raw materials during smelting.

[0061] Its preparation steps include:

[0062] S1. Put the raw materials into the medium-frequency induction furnace according to the weight ratio for smelting. The smelting temperature is 1650-1750°C. During the smelting process, the chemical composition is adjusted until the molten steel meets the chemical composition requirements;

[0063] S2. Continuously pour the smelted molten steel into a high-speed centrifugal forming machine, and throw it into a pool below 40°C under the action of...

Embodiment 3

[0070] According to the cast steel shot of two high carbon contents of the present invention, its chemical composition is respectively:

[0071] ① 0.71%C, 1.25%Mn, 0.31%Si, 0.12%Ti, 0.07%P, 0.029%S, the balance is Fe and unavoidable impurities and alloy elements brought in by raw materials during smelting;

[0072] ②0.69%C, 1.22%Mn, 0.30%Si, 0.12%Ti, 0.08%Nb, 0.06%P, 0.029%S, the balance is Fe and unavoidable impurities and alloying elements brought in by raw materials during smelting.

[0073] Its preparation steps include:

[0074] S1. Put the raw materials into the medium-frequency induction furnace according to the weight ratio for smelting. The smelting temperature is 1650-1750°C. During the smelting process, the chemical composition is adjusted until the molten steel meets the chemical composition requirements;

[0075] S2. Continuously pour the smelted molten steel into a high-speed centrifugal forming machine, and throw it into a pool below 40°C under the action of ce...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Diameteraaaaaaaaaa
Hardnessaaaaaaaaaa
Hardnessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a cast steel shot with a low-carbon martensite structure and a preparation process for the cast steel shot. The cast steel shot comprises the following chemical elements in percentage by mass: 0.25-0.75% of C, greater than 1.2% and less than or equal to 2.10% of Mn, 0.25-0.50% of Si, greater than 0.05% and less than or equal to 0.10% of P, less than 0.05% of S and the balance Fe, inevitable impurities and alloy elements brought in by raw materials during smelting. In the preparation process, a high-temperature or ultra-high-temperature quenching heating temperature higher than a conventional quenching heating temperature is adopted, and a quenched metallographic structure is the low-carbon martensite structure containing austenite films among laths. The cast steel shot has the advantages of being higher in obdurability, better in use performance, simple in preparation process, high in yield, good in quality and price advantages, environmentally-friendly and wide in application.

Description

technical field [0001] The invention relates to cast steel shots, in particular to a cast steel shot with a low-carbon martensitic structure and a preparation process thereof. Background technique [0002] There are two main methods of preparing shot blasting steel shot and shot blasting steel shot used to clean the surface of metal (casting) parts, improve the surface quality of metal (casting) parts, or strengthen the surface of metal parts: one is to use scrap steel and other raw materials After smelting and refining, the steel shot obtained by granulating high-temperature molten steel with a certain chemical composition by atomization or centrifugal method is called cast steel shot; Steel wire, the steel shot obtained by cutting into sections and subsequent finishing, is called cut wire shot. Among them, the preparation method of cast steel shot has the characteristics of simple preparation process, low cost, small performance deviation, and is especially suitable for m...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
14 Dec 2021
Publication
CN113789477A
IPC
C22C38/02; C22C38/04; C22C38/12; C22C38/14; C22C38/60; C21D1/18; C21D6/00; C21D9/36; C22C33/04
CPC
C22C38/04; C22C38/02; C22C38/60; C22C38/002; C22C38/14; C22C38/12; C22C33/04; C21D1/18
Inventors
丁志敏; 王小帆